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Plans</a></li></ul></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/proposing' class="offcanvas__section-link" >Proposing</a><button class="offcanvas__section-toggle" id="Proposing_6_control" type="button" aria-label="Proposing submenu" aria-controls="Proposing_6_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Proposing_6_section" class="offcanvas__list" data-level="3" aria-labelledby="Proposing_6_control"><li class="offcanvas__item hasChildren firstInLevel"><a href='/hst/proposing/phase-i' class="offcanvas__section-link" >Phase I</a><button class="offcanvas__section-toggle" id="Phase_I_7_control" type="button" aria-label="Phase I submenu" aria-controls="Phase_I_7_section" tabindex="-1" 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class="offcanvas__section-link" >Program Information</a></li><li class="offcanvas__item hasChildren lastInLevel"><a href='/hst/observing/post-observation' class="offcanvas__section-link" >Post-Observation</a><button class="offcanvas__section-toggle" id="Post-Observation_11_control" type="button" aria-label="Post-Observation submenu" aria-controls="Post-Observation_11_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Post-Observation_11_section" class="offcanvas__list" data-level="4" aria-labelledby="Post-Observation_11_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/observing/post-observation/data-analysis-toolbox' class="offcanvas__section-link" >Data Analysis Toolbox</a></li><li 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href='/hst/instrumentation/acs/performance/anneal-dates' class="offcanvas__section-link" >Anneal Dates</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/acs/performance/anomalies-and-artifacts' class="offcanvas__section-link" >Anomalies and Artifacts</a><button class="offcanvas__section-toggle" id="Anomalies_and_Artifacts_16_control" type="button" aria-label="Anomalies and Artifacts submenu" aria-controls="Anomalies_and_Artifacts_16_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Anomalies_and_Artifacts_16_section" class="offcanvas__list" data-level="6" aria-labelledby="Anomalies_and_Artifacts_16_control"><li class="offcanvas__item noChildren firstInLevel"><a 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submenu" aria-controls="Prism_-_Grism_18_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Prism_-_Grism_18_section" class="offcanvas__list" data-level="6" aria-labelledby="Prism_-_Grism_18_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/acs/performance/prism--grism/acs-axe-downloadable-files' class="offcanvas__section-link" >ACS aXe Downloadable files</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/performance/prism--grism/wfc-g800l' class="offcanvas__section-link" >WFC G800L</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/performance/prism--grism/hrc-g800l' class="offcanvas__section-link" >HRC G800L</a></li><li 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class="offcanvas__list" data-level="5" aria-labelledby="Proposing_19_control"><li class="offcanvas__item noChildren firstInLevel"><a href='http://etc.stsci.edu/etc/' class="offcanvas__section-link" target='_blank' >ACS ETC</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies' class="offcanvas__section-link" >Dither Strategies</a><button class="offcanvas__section-toggle" id="Dither_Strategies_20_control" type="button" aria-label="Dither Strategies submenu" aria-controls="Dither_Strategies_20_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Dither_Strategies_20_section" class="offcanvas__list" data-level="6" aria-labelledby="Dither_Strategies_20_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-wfc-dither-line' class="offcanvas__section-link" >ACS-WFC-DITHER-LINE</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-wfc-dither-box' class="offcanvas__section-link" >ACS-WFC-DITHER-BOX</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-wfc-mosaic-line' class="offcanvas__section-link" >ACS-WFC-MOSAIC-LINE</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-wfc-mosaic-box' class="offcanvas__section-link" >ACS-WFC-MOSAIC-BOX</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-hrc-dither-line' class="offcanvas__section-link" >ACS-HRC-DITHER-LINE</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-hrc-dither-box' class="offcanvas__section-link" >ACS-HRC-DITHER-BOX</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-hrc-mosaic-line' class="offcanvas__section-link" >ACS-HRC-MOSAIC-LINE</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-hrc-mosaic-box' class="offcanvas__section-link" >ACS-HRC-MOSAIC-BOX</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-sbc-dither-line' class="offcanvas__section-link" >ACS-SBC-DITHER-LINE</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-sbc-dither-box' class="offcanvas__section-link" >ACS-SBC-DITHER-BOX</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-sbc-mosaic-line' class="offcanvas__section-link" >ACS-SBC-MOSAIC-LINE</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/acs/proposing/dither-strategies/acs-sbc-mosaic-box' class="offcanvas__section-link" >ACS-SBC-MOSAIC-BOX</a></li></ul></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/acs/proposing/exception-report-instructions' class="offcanvas__section-link" >Exception Report Instructions</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/acs/data-analysis' class="offcanvas__section-link" >Data Analysis</a><button class="offcanvas__section-toggle" id="Data_Analysis_21_control" type="button" aria-label="Data Analysis submenu" aria-controls="Data_Analysis_21_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Data_Analysis_21_section" class="offcanvas__list" data-level="5" aria-labelledby="Data_Analysis_21_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/acs/data-analysis/aperture-corrections' class="offcanvas__section-link" >Aperture Corrections</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/data-analysis/distortion' class="offcanvas__section-link" >Distortion</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/data-analysis/dq-flag-definitions' class="offcanvas__section-link" >DQ Flag Definitions</a></li><li class="offcanvas__item noChildren"><a href='http://drizzlepac.stsci.edu/' class="offcanvas__section-link" target='_blank' >DrizzlePac</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/data-analysis/pixel-area-maps' class="offcanvas__section-link" >Pixel Area 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Handbook</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/documentation/instrument-science-reports-isrs' class="offcanvas__section-link" >Instrument Science Reports (ISRs)</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/acs/documentation/stsci-analysis-newsletter-stan' class="offcanvas__section-link" >STScI Analysis Newsletter (STAN)</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/acs/documentation/conference-posters' class="offcanvas__section-link" >Conference Posters</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/acs/shortcuts' class="offcanvas__section-link" >Shortcuts</a><button class="offcanvas__section-toggle" id="Shortcuts_25_control" type="button" aria-label="Shortcuts submenu" aria-controls="Shortcuts_25_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use 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>ACS Spectroscopic ETC</a></li><li class="offcanvas__item noChildren"><a href='http://etc.stsci.edu/etc/input/acs/rampfilter/' class="offcanvas__section-link" target='_blank' >ACS Ramp Filter ETC</a></li><li class="offcanvas__item noChildren"><a href='/hst/proposing' class="offcanvas__section-link" target='_self' >HST Proposing</a></li><li class="offcanvas__item noChildren"><a href='/hst/proposing/phase-i' class="offcanvas__section-link" target='_blank' >Phase I Proposals</a></li><li class="offcanvas__item noChildren"><a href='/hst/proposing/phase-ii' class="offcanvas__section-link" target='_self' >Phase II Proposal</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='https://hst-docs.stsci.edu/display/HSP/The+Hubble+Space+Telescope+Primer+for+Cycle+32' class="offcanvas__section-link" target='_blank' >HST Cycle 32 Primer</a></li></ul></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/cos' class="offcanvas__section-link" >Cosmic Origins 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class="offcanvas__section-link" >Spectral Resolution and Line Spread Functions</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/cos/proposing' class="offcanvas__section-link" >Proposing</a><button class="offcanvas__section-toggle" id="Proposing_28_control" type="button" aria-label="Proposing submenu" aria-controls="Proposing_28_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Proposing_28_section" class="offcanvas__list" data-level="5" aria-labelledby="Proposing_28_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/cos/proposing/cos2025-policies' class="offcanvas__section-link" >COS2025 Policies</a></li><li class="offcanvas__item 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aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Calibration_29_section" class="offcanvas__list" data-level="5" aria-labelledby="Calibration_29_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/cos/calibration/airglow' class="offcanvas__section-link" >Airglow</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-31-calibration-plan' class="offcanvas__section-link" >Cycle 31 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-30-calibration-plan' class="offcanvas__section-link" >Cycle 30 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-29-calibration-plan' class="offcanvas__section-link" >Cycle 29 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-28-calibration-plan' class="offcanvas__section-link" >Cycle 28 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-27-calibration-plan' class="offcanvas__section-link" >Cycle 27 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-26-calibration-plan' class="offcanvas__section-link" >Cycle 26 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-25-calibration-plan' class="offcanvas__section-link" >Cycle 25 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-24-calibration-plan' class="offcanvas__section-link" >Cycle 24 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-23-calibration-plan' class="offcanvas__section-link" >Cycle 23 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-22-calibration-plan' class="offcanvas__section-link" >Cycle 22 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-21-calibration-plan' class="offcanvas__section-link" >Cycle 21 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-20-calibration-plan' class="offcanvas__section-link" >Cycle 20 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-19-calibration-plan' class="offcanvas__section-link" >Cycle 19 Calibration Plan</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/calibration/cycle-18-calibration-plan' class="offcanvas__section-link" >Cycle 18 Calibration Plan</a></li><li class="offcanvas__item noChildren lastInLevel"><a 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class="offcanvas__section-link" target='_blank' >COS Instrument Handbook</a></li><li class="offcanvas__item noChildren"><a href='https://hst-docs.stsci.edu/display/COSDHB' class="offcanvas__section-link" target='_blank' >COS Data Handbook</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/documentation/instrument-science-reports-isrs' class="offcanvas__section-link" >Instrument Science Reports (ISRs)</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/documentation/stsci-analysis-newsletter-stan' class="offcanvas__section-link" >STScI Analysis Newsletter (STAN)</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/documentation/exception-report-instructions' class="offcanvas__section-link" >Exception Report Instructions</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/cos/documentation/conference-posters' class="offcanvas__section-link" >Conference Posters</a></li><li 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tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Instrument_Design_34_section" class="offcanvas__list" data-level="5" aria-labelledby="Instrument_Design_34_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/stis/instrument-design/apertures' class="offcanvas__section-link" >Apertures</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/stis/instrument-design/detectors' class="offcanvas__section-link" >Detectors</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/stis/instrument-design/filters' class="offcanvas__section-link" >Filters</a></li><li class="offcanvas__item hasChildren lastInLevel"><a 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class="offcanvas__item noChildren"><a href='/hst/instrumentation/stis/performance/monitoring' class="offcanvas__section-link" >Monitoring</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/stis/performance/sensitivity' class="offcanvas__section-link" >Sensitivity</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/stis/performance/spectral-resolution' class="offcanvas__section-link" >Spectral Resolution</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/stis/performance/throughput' class="offcanvas__section-link" >Throughput</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/stis/performance/background-noise' class="offcanvas__section-link" >Background Noise</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/stis/proposing' class="offcanvas__section-link" >Proposing</a><button class="offcanvas__section-toggle" id="Proposing_37_control" type="button" aria-label="Proposing submenu" aria-controls="Proposing_37_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Proposing_37_section" class="offcanvas__list" data-level="5" aria-labelledby="Proposing_37_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/stis/proposing/go-wavecal-aperture-selection' class="offcanvas__section-link" >GO Wavecal Aperture Selection</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/stis/proposing/exception-reports' class="offcanvas__section-link" >Exception Reports</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/stis/observing-strategies' class="offcanvas__section-link" >Observing Strategies</a><button class="offcanvas__section-toggle" id="Observing_Strategies_38_control" type="button" aria-label="Observing Strategies submenu" aria-controls="Observing_Strategies_38_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Observing_Strategies_38_section" class="offcanvas__list" data-level="5" aria-labelledby="Observing_Strategies_38_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/stis/observing-strategies/target-acquisition' class="offcanvas__section-link" >Target Acquisition</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/stis/observing-strategies/spectroscopy' class="offcanvas__section-link" >Spectroscopy</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/stis/observing-strategies/imaging' class="offcanvas__section-link" >Imaging</a></li><li class="offcanvas__item hasChildren lastInLevel"><a href='/hst/instrumentation/stis/observing-strategies/available-modes' class="offcanvas__section-link" >Available Modes</a><button class="offcanvas__section-toggle" id="Available_Modes_39_control" type="button" aria-label="Available Modes submenu" aria-controls="Available_Modes_39_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Available_Modes_39_section" class="offcanvas__list" data-level="6" aria-labelledby="Available_Modes_39_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/stis/observing-strategies/available-modes/high-contrast-coronagraphy-at-small-inner-working-angles-with-bar5' class="offcanvas__section-link" >High Contrast Coronagraphy at Small Inner Working Angles with BAR5</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/stis/observing-strategies/available-modes/stis-bar5' class="offcanvas__section-link" >STIS BAR5</a></li></ul></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/stis/data-analysis-and-software-tools' class="offcanvas__section-link" >Data Analysis and Software Tools</a><button class="offcanvas__section-toggle" id="Data_Analysis_and_Software_Tools_40_control" type="button" aria-label="Data Analysis and Software Tools submenu" aria-controls="Data_Analysis_and_Software_Tools_40_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Data_Analysis_and_Software_Tools_40_section" class="offcanvas__list" data-level="5" aria-labelledby="Data_Analysis_and_Software_Tools_40_control"><li class="offcanvas__item noChildren firstInLevel lastInLevel"><a href='/hst/instrumentation/stis/data-analysis-and-software-tools/pixel-based-cti' class="offcanvas__section-link" >Pixel Based CTI</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/stis/calibration' class="offcanvas__section-link" >Calibration</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/stis/documentation' class="offcanvas__section-link" >Documentation</a><button class="offcanvas__section-toggle" id="Documentation_41_control" type="button" aria-label="Documentation submenu" aria-controls="Documentation_41_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Documentation_41_section" class="offcanvas__list" data-level="5" aria-labelledby="Documentation_41_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/stis/documentation/instrument-science-reports' class="offcanvas__section-link" >Instrument Science Reports</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/stis/documentation/stsci-analysis-newsletter-stan' class="offcanvas__section-link" >STScI Analysis Newsletter (STAN)</a></li><li class="offcanvas__item noChildren"><a href='https://hst-docs.stsci.edu/stisihb' class="offcanvas__section-link" target='_blank' >STIS Instrument Handbook</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='https://hst-docs.stsci.edu/stisdhb' class="offcanvas__section-link" target='_blank' >STIS Data Handbook</a></li></ul></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/stis/flux-recalibration' class="offcanvas__section-link" >Flux Recalibration</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3' class="offcanvas__section-link" >Wide Field Camera 3</a><button class="offcanvas__section-toggle" id="Wide_Field_Camera_3_42_control" type="button" aria-label="Wide Field Camera 3 submenu" aria-controls="Wide_Field_Camera_3_42_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Wide_Field_Camera_3_42_section" class="offcanvas__list" data-level="4" aria-labelledby="Wide_Field_Camera_3_42_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/wfc3/instrument-design' class="offcanvas__section-link" >Instrument Design</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/performance' class="offcanvas__section-link" >Performance</a><button class="offcanvas__section-toggle" id="Performance_43_control" type="button" aria-label="Performance submenu" aria-controls="Performance_43_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Performance_43_section" class="offcanvas__list" data-level="5" aria-labelledby="Performance_43_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/wfc3/performance/usage-statistics' class="offcanvas__section-link" >Usage Statistics</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/performance/anomalies' class="offcanvas__section-link" >Anomalies</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/performance/cte' class="offcanvas__section-link" >CTE</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/performance/ground-testing' class="offcanvas__section-link" >Ground Testing</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/performance/monitoring' class="offcanvas__section-link" >Monitoring</a><button class="offcanvas__section-toggle" id="Monitoring_44_control" type="button" aria-label="Monitoring submenu" aria-controls="Monitoring_44_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Monitoring_44_section" class="offcanvas__list" data-level="6" aria-labelledby="Monitoring_44_control"><li class="offcanvas__item noChildren firstInLevel lastInLevel"><a href='/hst/instrumentation/wfc3/performance/monitoring/complete-anneal-history' class="offcanvas__section-link" >Complete Anneal History</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/performance/throughputs' class="offcanvas__section-link" >Throughputs</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/wfc3/performance/cal-subsystem' class="offcanvas__section-link" >Cal Subsystem</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/proposing' class="offcanvas__section-link" >Proposing</a><button class="offcanvas__section-toggle" id="Proposing_45_control" type="button" aria-label="Proposing submenu" aria-controls="Proposing_45_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Proposing_45_section" class="offcanvas__list" data-level="5" aria-labelledby="Proposing_45_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/wfc3/proposing/dithering-strategies' class="offcanvas__section-link" >Dithering Strategies</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/wfc3/proposing/exception-reports' class="offcanvas__section-link" >Exception Reports</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/data-analysis' class="offcanvas__section-link" >Data Analysis</a><button class="offcanvas__section-toggle" id="Data_Analysis_46_control" type="button" aria-label="Data Analysis submenu" aria-controls="Data_Analysis_46_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Data_Analysis_46_section" class="offcanvas__list" data-level="5" aria-labelledby="Data_Analysis_46_control"><li class="offcanvas__item noChildren firstInLevel"><a href='https://github.com/spacetelescope/WFC3Library/tree/master/notebooks/filter_transformations' class="offcanvas__section-link" target='_blank' >Color Conversion Notebook</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/data-analysis/full-well-depth' class="offcanvas__section-link" >Full Well Depth</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/documentation/grism-resources' class="offcanvas__section-link" >Grism Spectroscopy</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/data-analysis/ir-flats' class="offcanvas__section-link" >IR Flats</a><button class="offcanvas__section-toggle" id="IR_Flats_47_control" type="button" aria-label="IR Flats submenu" aria-controls="IR_Flats_47_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="IR_Flats_47_section" class="offcanvas__list" data-level="6" aria-labelledby="IR_Flats_47_control"><li class="offcanvas__item noChildren firstInLevel lastInLevel"><a href='/hst/instrumentation/wfc3/data-analysis/ir-flats/blob-delta-flats-from-earth-flat-calibration-images' class="offcanvas__section-link" >Blob Delta-flats from Earth Flat Calibration Images</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/data-analysis/ir-persistence' class="offcanvas__section-link" >IR Persistence</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/data-analysis/photometric-calibration' class="offcanvas__section-link" >Photometric Calibration</a><button class="offcanvas__section-toggle" id="Photometric_Calibration_48_control" type="button" aria-label="Photometric Calibration submenu" aria-controls="Photometric_Calibration_48_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Photometric_Calibration_48_section" class="offcanvas__list" data-level="6" aria-labelledby="Photometric_Calibration_48_control"><li class="offcanvas__item hasChildren firstInLevel"><a href='/hst/instrumentation/wfc3/data-analysis/photometric-calibration/uvis-photometric-calibration' class="offcanvas__section-link" >UVIS Photometric Calibration</a><button class="offcanvas__section-toggle" id="UVIS_Photometric_Calibration_49_control" type="button" aria-label="UVIS Photometric Calibration submenu" aria-controls="UVIS_Photometric_Calibration_49_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="UVIS_Photometric_Calibration_49_section" class="offcanvas__list" data-level="7" aria-labelledby="UVIS_Photometric_Calibration_49_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/wfc3/data-analysis/photometric-calibration/uvis-photometric-calibration/quad-filter-photometry' class="offcanvas__section-link" >Quad Filter Photometry</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/data-analysis/photometric-calibration/uvis-photometric-calibration/uv-filter-modified-keywords' class="offcanvas__section-link" >UV Filter Modified Keywords</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/wfc3/data-analysis/photometric-calibration/uvis-photometric-calibration/previous-uvis-photometric-calibrations' class="offcanvas__section-link" >Previous UVIS Photometric Calibrations</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/data-analysis/photometric-calibration/uvis-encircled-energy' class="offcanvas__section-link" >UVIS Encircled Energy</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/data-analysis/photometric-calibration/ir-photometric-calibration' class="offcanvas__section-link" >IR Photometric Calibration</a><button class="offcanvas__section-toggle" id="IR_Photometric_Calibration_50_control" type="button" aria-label="IR Photometric Calibration submenu" aria-controls="IR_Photometric_Calibration_50_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="IR_Photometric_Calibration_50_section" class="offcanvas__list" data-level="7" aria-labelledby="IR_Photometric_Calibration_50_control"><li class="offcanvas__item noChildren firstInLevel lastInLevel"><a href='/hst/instrumentation/wfc3/data-analysis/photometric-calibration/ir-photometric-calibration/previous-ir-photometric-calibrations' class="offcanvas__section-link" >Previous IR Photometric Calibrations</a></li></ul></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/wfc3/data-analysis/photometric-calibration/ir-encircled-energy' class="offcanvas__section-link" >IR Encircled Energy</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/data-analysis/pixel-area-maps' class="offcanvas__section-link" >Pixel Area Maps</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/data-analysis/psf' class="offcanvas__section-link" >PSF</a><button class="offcanvas__section-toggle" id="PSF_51_control" type="button" aria-label="PSF submenu" aria-controls="PSF_51_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="PSF_51_section" class="offcanvas__list" data-level="6" aria-labelledby="PSF_51_control"><li class="offcanvas__item noChildren firstInLevel lastInLevel"><a href='/hst/instrumentation/wfc3/data-analysis/psf/psf-search' class="offcanvas__section-link" >PSF Search</a></li></ul></li><li class="offcanvas__item noChildren"><a href='http://archive.stsci.edu/hst/index.html' class="offcanvas__section-link" target='_blank' >Retrieving Data</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/data-analysis/should-i-recalibrate' class="offcanvas__section-link" >Should I Recalibrate?</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/data-analysis/uvis-flats' class="offcanvas__section-link" >UVIS Flats</a></li><li class="offcanvas__item noChildren"><a href='/hst/observing/post-observation' class="offcanvas__section-link" >Post-Observation</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/wfc3/data-analysis/uvis-and-ir-distortion-calibration' class="offcanvas__section-link" >UVIS and IR Distortion Calibration</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/calibration-plan' class="offcanvas__section-link" >Calibration Plan</a><button class="offcanvas__section-toggle" id="Calibration_Plan_52_control" type="button" aria-label="Calibration Plan submenu" aria-controls="Calibration_Plan_52_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Calibration_Plan_52_section" class="offcanvas__list" data-level="5" aria-labelledby="Calibration_Plan_52_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/wfc3/calibration-plan/tv3-results' class="offcanvas__section-link" >TV3 Results</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/calibration-plan/tv2-results' class="offcanvas__section-link" >TV2 Results</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/calibration-plan/tv1-results' class="offcanvas__section-link" >TV1 Results</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/wfc3/calibration-plan/old-versions' class="offcanvas__section-link" >Old Versions</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/software-tools' class="offcanvas__section-link" >Software Tools</a><button class="offcanvas__section-toggle" id="Software_Tools_53_control" type="button" aria-label="Software Tools submenu" aria-controls="Software_Tools_53_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Software_Tools_53_section" class="offcanvas__list" data-level="5" aria-labelledby="Software_Tools_53_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/wfc3/software-tools/crosstalk' class="offcanvas__section-link" >Crosstalk</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/software-tools/cte-tools' class="offcanvas__section-link" >CTE Tools</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/software-tools/exposure-time-calculators' class="offcanvas__section-link" >Exposure Time Calculators</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/wfc3/software-tools/pipeline' class="offcanvas__section-link" >Pipeline</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/documentation' class="offcanvas__section-link" >Documentation</a><button class="offcanvas__section-toggle" id="Documentation_54_control" type="button" aria-label="Documentation submenu" aria-controls="Documentation_54_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Documentation_54_section" class="offcanvas__list" data-level="5" aria-labelledby="Documentation_54_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/wfc3/documentation/instrument-science-reports-isrs' class="offcanvas__section-link" >Instrument Science Reports (ISRs)</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/documentation/stsci-analysis-newsletter-stan' class="offcanvas__section-link" >STScI Analysis Newsletter (STAN)</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/wfc3/documentation/grism-resources' class="offcanvas__section-link" >Grism Resources</a><button class="offcanvas__section-toggle" id="Grism_Resources_55_control" type="button" aria-label="Grism Resources submenu" aria-controls="Grism_Resources_55_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Grism_Resources_55_section" class="offcanvas__list" data-level="6" aria-labelledby="Grism_Resources_55_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/wfc3/documentation/grism-resources/grism-data-analysis' class="offcanvas__section-link" >Grism Data Analysis</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/documentation/grism-resources/wfc3-ir-grism-data-reduction-cookbook' class="offcanvas__section-link" >WFC3 IR Grism Data Reduction Cookbook</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/documentation/grism-resources/grism-frequently-asked-questions' class="offcanvas__section-link" >Grism Frequently Asked Questions</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/documentation/grism-resources/ir-grism-sky-images' class="offcanvas__section-link" >IR Grism Sky Images</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/documentation/grism-resources/wfc3-g141-calibrations' class="offcanvas__section-link" >WFC3 G141 Calibrations</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/documentation/grism-resources/wfc3-g280-calibrations' class="offcanvas__section-link" >WFC3 G280 Calibrations</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/wfc3/documentation/grism-resources/wfc3-g102-calibrations' class="offcanvas__section-link" >WFC3 G102 Calibrations</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/wfc3/documentation/grism-resources/uvis-grism-sky-images' class="offcanvas__section-link" >UVIS Grism Sky Images</a></li></ul></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/wfc3/documentation/conference-posters' class="offcanvas__section-link" >Conference Posters</a></li></ul></li><li 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Model</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/focus-and-pointing/focus/tiny-tim-hst-psf-modeling' class="offcanvas__section-link" >Tiny Tim HST PSF Modeling</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/focus-and-pointing/pointing' class="offcanvas__section-link" >Pointing</a><button class="offcanvas__section-toggle" id="Pointing_58_control" type="button" aria-label="Pointing submenu" aria-controls="Pointing_58_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Pointing_58_section" class="offcanvas__list" data-level="5" aria-labelledby="Pointing_58_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/focus-and-pointing/pointing/jitter-file-format-definition' class="offcanvas__section-link" >Jitter File Format Definition</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/focus-and-pointing/pointing/determining-an-observations-orientation' class="offcanvas__section-link" >Determining an Observation’s Orientation</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/focus-and-pointing/fov-geometry' class="offcanvas__section-link" >FoV Geometry</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/focus-and-pointing/documentation' class="offcanvas__section-link" >Documentation</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/legacy' class="offcanvas__section-link" >Legacy Instruments</a><button class="offcanvas__section-toggle" id="Legacy_Instruments_59_control" type="button" aria-label="Legacy Instruments submenu" 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class="offcanvas__list" data-level="5" aria-labelledby="WFPC2_61_control"><li class="offcanvas__item noChildren firstInLevel lastInLevel"><a href='/hst/instrumentation/legacy/wfpc2/instrument-science-reports-isrs' class="offcanvas__section-link" >Instrument Science Reports (ISRs)</a></li></ul></li></ul></li><li class="offcanvas__item hasChildren lastInLevel"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools' class="offcanvas__section-link" >Reference Data for Calibration and Tools</a><button class="offcanvas__section-toggle" id="Reference_Data_for_Calibration_and_Tools_62_control" type="button" aria-label="Reference Data for Calibration and Tools submenu" aria-controls="Reference_Data_for_Calibration_and_Tools_62_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Reference_Data_for_Calibration_and_Tools_62_section" class="offcanvas__list" data-level="4" aria-labelledby="Reference_Data_for_Calibration_and_Tools_62_control"><li class="offcanvas__item noChildren firstInLevel"><a href='https://hst-crds.stsci.edu/' class="offcanvas__section-link" target='_blank' >Calibration Reference Data System (CRDS)</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/file-and-table-structures' class="offcanvas__section-link" >File and Table Structures</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/reference-file-retreival-instructions' class="offcanvas__section-link" >Reference File Retrieval Instructions</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/legacy-instrument-reference-files' class="offcanvas__section-link" >Legacy Instrument Reference Files</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/synphot-throughput-tables' class="offcanvas__section-link" >Synphot Throughput Tables</a></li><li class="offcanvas__item hasChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs' class="offcanvas__section-link" >Astronomical Catalogs</a><button class="offcanvas__section-toggle" id="Astronomical_Catalogs_63_control" type="button" aria-label="Astronomical Catalogs submenu" aria-controls="Astronomical_Catalogs_63_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Astronomical_Catalogs_63_section" class="offcanvas__list" data-level="5" aria-labelledby="Astronomical_Catalogs_63_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/the-agn-atlas' class="offcanvas__section-link" >The AGN Atlas</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/atmo-2020-atmosphere-models' class="offcanvas__section-link" >ATMO 2020 Atmosphere Models</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/brown-dwarfs-and-substellar-objects' class="offcanvas__section-link" >Brown Dwarfs and Substellar Objects</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/bruzual-atlas' class="offcanvas__section-link" >Bruzual Atlas</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/the-bruzual-charlot-atlas' class="offcanvas__section-link" >The Bruzual-Charlot Atlas</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/bruzual-and-charlot-2003' class="offcanvas__section-link" >Bruzual and Charlot 2003</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/bruzual-persson-gunn-stryker-atlas-list' class="offcanvas__section-link" >Bruzual-Persson-Gunn-Stryker Atlas list</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/buser-kurucz-atlas' class="offcanvas__section-link" >Buser-Kurucz Atlas</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calobs' class="offcanvas__section-link" >CALOBS</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calspec' class="offcanvas__section-link" >CALSPEC</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/castelli-and-kurucz-atlas' class="offcanvas__section-link" >Castelli and Kurucz Atlas</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/composite-qso-spectra-for-nir' class="offcanvas__section-link" >Composite QSO Spectra for NIR</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/the-galactic-emission-line-object-atlas' class="offcanvas__section-link" >The Galactic Emission Line Object Atlas</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/gunn-stryker-atlas-list' class="offcanvas__section-link" >Gunn-Stryker Atlas list</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/interstellar-extinction-curves' class="offcanvas__section-link" >Interstellar Extinction Curves</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/jacoby-hunter-christian-atlas' class="offcanvas__section-link" >Jacoby-Hunter-Christian Atlas</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/the-kinney-calzetti-spetral-atlas' class="offcanvas__section-link" >The Kinney-Calzetti Spectral Atlas</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/kinney-models' class="offcanvas__section-link" >Kinney Models</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/kurucz-1993-models' class="offcanvas__section-link" >Kurucz 1993 Models</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/non-stellar-spectra' class="offcanvas__section-link" >Non-Stellar Spectra</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/novae-models' class="offcanvas__section-link" >Novae Models</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/phoenix-models-available-in-synphot' class="offcanvas__section-link" >Phoenix Models available in Synphot</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/planetary-nebula-spectra' class="offcanvas__section-link" >Planetary Nebula Spectra</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/pickles-atlas' class="offcanvas__section-link" >Pickles Atlas</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/simple-stellar-population-atlas' class="offcanvas__section-link" >Simple Stellar Population Atlas</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/solar-system-objects-spectra' class="offcanvas__section-link" >Solar System Objects Spectra</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/swire-galaxies' class="offcanvas__section-link" >SWIRE Galaxies</a></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/the-trds-brown-atlas' class="offcanvas__section-link" >The TRDS Brown Atlas</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/trds-brown19-spectra-of-agns' class="offcanvas__section-link" >TRDS Brown19 Spectra of AGNs</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/modewave-data' class="offcanvas__section-link" >Modewave Data</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/hst/instrumentation/reference-data-for-calibration-and-tools/documentation' class="offcanvas__section-link" 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aria-controls="History_68_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="History_68_section" class="offcanvas__list" data-level="4" aria-labelledby="History_68_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/about-jwst/history/historical-sensitivity-estimates' class="offcanvas__section-link" >Historical Sensitivity Estimates</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/jwst-advisory-committee-jstac' class="offcanvas__section-link" >JWST Advisory Committee (JSTAC)</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/flyers' class="offcanvas__section-link" >Flyers</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/white-papers' class="offcanvas__section-link" >White Papers</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/design-reference-mission-drm' class="offcanvas__section-link" >Design Reference Mission (DRM)</a></li><li class="offcanvas__item hasChildren lastInLevel"><a href='/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm' class="offcanvas__section-link" >Science Operations Design Reference Mission (SODRM)</a><button class="offcanvas__section-toggle" id="Science_Operations_Design_Reference_Mission_-SODRM-_69_control" type="button" aria-label="Science Operations Design Reference Mission (SODRM) submenu" aria-controls="Science_Operations_Design_Reference_Mission_-SODRM-_69_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Science_Operations_Design_Reference_Mission_-SODRM-_69_section" class="offcanvas__list" data-level="5" aria-labelledby="Science_Operations_Design_Reference_Mission_-SODRM-_69_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm/solar-system-programs' class="offcanvas__section-link" >Solar System Programs</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm/exoplanet-programs' class="offcanvas__section-link" >Exoplanet Programs</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm/galactic-programs' class="offcanvas__section-link" >Galactic Programs</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm/nearby-galaxies-programs' class="offcanvas__section-link" >Nearby Galaxies Programs</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm/distant-galaxies-and-cosmology-programs' class="offcanvas__section-link" >Distant Galaxies and Cosmology Programs</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm/instrumentation-calibration-programs' class="offcanvas__section-link" >Instrumentation Calibration Programs</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm/observation-calibration-programs' class="offcanvas__section-link" >Observation Calibration Programs</a></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/history/science-operations-design-reference-mission-sodrm/statistical-summary' class="offcanvas__section-link" >Statistical Summary</a></li></ul></li></ul></li><li class="offcanvas__item noChildren"><a href='/jwst/about-jwst/stsci-and-jwst' class="offcanvas__section-link" >STScI and JWST</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/jwst/about-jwst/science-themes' class="offcanvas__section-link" >Science Themes</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/jwst/news-events' class="offcanvas__section-link" >News & Events</a><button class="offcanvas__section-toggle" id="News_and_Events_70_control" type="button" aria-label="News and Events submenu" aria-controls="News_and_Events_70_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="News_and_Events_70_section" class="offcanvas__list" data-level="3" aria-labelledby="News_and_Events_70_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/news-events/news' class="offcanvas__section-link" >News</a></li><li class="offcanvas__item noChildren"><a href='/jwst/news-events/events' class="offcanvas__section-link" >Events</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/jwst/news-events/articles' class="offcanvas__section-link" >Articles</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/jwst/instrumentation' class="offcanvas__section-link" >Instrumentation</a><button class="offcanvas__section-toggle" id="Instrumentation_71_control" type="button" aria-label="Instrumentation submenu" aria-controls="Instrumentation_71_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Instrumentation_71_section" class="offcanvas__list" data-level="3" aria-labelledby="Instrumentation_71_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/instrumentation/instruments' class="offcanvas__section-link" >Science Instruments</a></li><li class="offcanvas__item noChildren"><a href='/jwst/instrumentation/imaging-modes' class="offcanvas__section-link" >Imaging Modes</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/jwst/instrumentation/spectroscopic-modes' class="offcanvas__section-link" >Spectroscopic Modes</a></li></ul></li><li class="offcanvas__item hasChildren"><a href='/jwst/science-planning' class="offcanvas__section-link" >Science Planning</a><button class="offcanvas__section-toggle" id="Science_Planning_72_control" type="button" aria-label="Science Planning submenu" aria-controls="Science_Planning_72_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Science_Planning_72_section" class="offcanvas__list" data-level="3" aria-labelledby="Science_Planning_72_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/science-planning/calls-for-proposals-and-policy' class="offcanvas__section-link" >Calls for Proposals and Policy</a></li><li class="offcanvas__item hasChildren"><a href='/jwst/science-planning/proposal-planning-toolbox' class="offcanvas__section-link" >Proposal Planning Toolbox</a><button class="offcanvas__section-toggle" id="Proposal_Planning_Toolbox_73_control" type="button" aria-label="Proposal Planning Toolbox submenu" aria-controls="Proposal_Planning_Toolbox_73_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Proposal_Planning_Toolbox_73_section" class="offcanvas__list" data-level="4" aria-labelledby="Proposal_Planning_Toolbox_73_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/science-planning/proposal-planning-toolbox/exposure-time-calculator' class="offcanvas__section-link" >Exposure Time Calculator</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-planning/proposal-planning-toolbox/target-visibility-tools' class="offcanvas__section-link" >Target Visibility Tools</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-planning/proposal-planning-toolbox/psf-simulation-tool' class="offcanvas__section-link" >PSF Simulation Tool</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-planning/proposal-planning-toolbox/jist' class="offcanvas__section-link" >JIST</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-planning/proposal-planning-toolbox/sensitivity-and-saturation-limits' class="offcanvas__section-link" >Sensitivity and Saturation Limits</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-planning/proposal-planning-toolbox/mirage' class="offcanvas__section-link" >Mirage</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-planning/proposal-planning-toolbox/mirisim' class="offcanvas__section-link" >MIRISim</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-planning/proposal-planning-toolbox/simulated-data' class="offcanvas__section-link" >Simulated Data</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/jwst/science-planning/proposal-planning-toolbox/proposal-training' class="offcanvas__section-link" >Proposal Training</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/jwst/science-planning/tools-from-the-community' class="offcanvas__section-link" >Tools from the Community</a></li><li class="offcanvas__item hasChildren lastInLevel"><a href='/jwst/science-planning/user-committees' class="offcanvas__section-link" >User Committees</a><button class="offcanvas__section-toggle" id="User_Committees_74_control" type="button" aria-label="User Committees submenu" aria-controls="User_Committees_74_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="User_Committees_74_section" class="offcanvas__list" data-level="4" aria-labelledby="User_Committees_74_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/science-planning/user-committees/jwst-users-committee' class="offcanvas__section-link" >JWST Users Committee</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/jwst/science-planning/user-committees/jwst-science-working-group' class="offcanvas__section-link" >JWST Science Working Group</a></li></ul></li></ul></li><li class="offcanvas__item hasChildren"><a href='/jwst/science-execution' class="offcanvas__section-link" >Science Execution</a><button class="offcanvas__section-toggle" id="Science_Execution_75_control" type="button" aria-label="Science Execution submenu" aria-controls="Science_Execution_75_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Science_Execution_75_section" class="offcanvas__list" data-level="3" aria-labelledby="Science_Execution_75_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/science-execution/program-information' class="offcanvas__section-link" >Program Information</a></li><li class="offcanvas__item hasChildren"><a href='/jwst/science-execution/approved-programs' class="offcanvas__section-link" >Approved Programs</a><button class="offcanvas__section-toggle" id="Approved_Programs_76_control" type="button" aria-label="Approved Programs submenu" aria-controls="Approved_Programs_76_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Approved_Programs_76_section" class="offcanvas__list" data-level="4" aria-labelledby="Approved_Programs_76_control"><li class="offcanvas__item hasChildren firstInLevel"><a href='/jwst/science-execution/approved-programs/general-observers' class="offcanvas__section-link" >General Observers</a><button class="offcanvas__section-toggle" id="General_Observers_77_control" type="button" aria-label="General Observers submenu" aria-controls="General_Observers_77_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="General_Observers_77_section" class="offcanvas__list" data-level="5" aria-labelledby="General_Observers_77_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/science-execution/approved-programs/general-observers/cycle-1-go' class="offcanvas__section-link" >Cycle 1 GO</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/general-observers/cycle-2-go' class="offcanvas__section-link" >Cycle 2 GO</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/general-observers/cycle-3-go' class="offcanvas__section-link" >Cycle 3 GO</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/jwst/science-execution/approved-programs/general-observers/cycle-4-go' class="offcanvas__section-link" >Cycle 4 GO</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/guaranteed-time-observations' class="offcanvas__section-link" >Guaranteed Time Observations</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/directors-discretionary-time' class="offcanvas__section-link" >Director's Discretionary Time</a></li><li class="offcanvas__item hasChildren"><a href='/jwst/science-execution/approved-ers-programs' class="offcanvas__section-link" >DD-ERS</a><button class="offcanvas__section-toggle" id="DD-ERS_78_control" type="button" aria-label="DD-ERS submenu" aria-controls="DD-ERS_78_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="DD-ERS_78_section" class="offcanvas__list" data-level="5" aria-labelledby="DD-ERS_78_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1288' class="offcanvas__section-link" >ERS Program 1288</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1309' class="offcanvas__section-link" >ERS Program 1309</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1324' class="offcanvas__section-link" >ERS Program 1324</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1328' class="offcanvas__section-link" >ERS Program 1328</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1334' class="offcanvas__section-link" >ERS Program 1334</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1335' class="offcanvas__section-link" >ERS Program 1335</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1345' class="offcanvas__section-link" >ERS Program 1345</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1349' class="offcanvas__section-link" >ERS Program 1349</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1355' class="offcanvas__section-link" >ERS Program 1355</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1364' class="offcanvas__section-link" >ERS Program 1364</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1366' class="offcanvas__section-link" >ERS Program 1366</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1373' class="offcanvas__section-link" >ERS Program 1373</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/jwst/science-execution/approved-programs/dd-ers/program-1386' class="offcanvas__section-link" >ERS Program 1386</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/approved-programs/calibration' class="offcanvas__section-link" >Calibration</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/jwst/science-execution/approved-programs/webb-first-image-observations' class="offcanvas__section-link" >Webb First Image Observations</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/observing-schedules' class="offcanvas__section-link" >Observing Schedules</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/jwebbinars' class="offcanvas__section-link" >JWebbinars</a></li><li class="offcanvas__item noChildren"><a href='/jwst/science-execution/data-analysis-toolbox' class="offcanvas__section-link" >Data Analysis Toolbox</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/jwst/science-execution/science-publications' class="offcanvas__section-link" >Science Publications</a></li></ul></li><li class="offcanvas__item hasChildren lastInLevel"><a href='/jwst/documentation' class="offcanvas__section-link" >Documentation</a><button class="offcanvas__section-toggle" id="Documentation_79_control" type="button" aria-label="Documentation submenu" aria-controls="Documentation_79_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Documentation_79_section" class="offcanvas__list" data-level="3" aria-labelledby="Documentation_79_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/jwst/documentation/technical-documents' class="offcanvas__section-link" >Technical Documents</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='https://jwst-docs.stsci.edu/' class="offcanvas__section-link" target='_blank' >JDox</a></li></ul></li></ul></li><li class="offcanvas__item hasChildren"><a href='/roman' class="offcanvas__section-link" >Nancy Grace Roman Space Telescope</a><button class="offcanvas__section-toggle" id="Nancy_Grace_Roman_Space_Telescope_80_control" type="button" aria-label="Nancy Grace Roman Space Telescope submenu" aria-controls="Nancy_Grace_Roman_Space_Telescope_80_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Nancy_Grace_Roman_Space_Telescope_80_section" class="offcanvas__list" data-level="2" aria-labelledby="Nancy_Grace_Roman_Space_Telescope_80_control"><li class="offcanvas__item hasChildren firstInLevel"><a href='/roman/about' class="offcanvas__section-link" >About</a><button class="offcanvas__section-toggle" id="About_81_control" type="button" aria-label="About submenu" aria-controls="About_81_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="About_81_section" class="offcanvas__list" data-level="3" aria-labelledby="About_81_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/roman/about/science-themes' class="offcanvas__section-link" >Science Themes</a></li><li class="offcanvas__item noChildren"><a href='/roman/about/take-part-in-the-mission' class="offcanvas__section-link" >Take Part in the Mission</a></li><li class="offcanvas__item noChildren"><a href='/roman/about/partners' class="offcanvas__section-link" >Partners</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='/roman/about/roman-advisory-committee-rstac' class="offcanvas__section-link" >Roman Space Telescope Advisory Committee (RSTAC)</a></li></ul></li><li class="offcanvas__item noChildren"><a href='/roman/surveys-and-programs' class="offcanvas__section-link" >Surveys and Programs</a></li><li class="offcanvas__item noChildren"><a href='/roman/observatory' class="offcanvas__section-link" >Observatory</a></li><li class="offcanvas__item noChildren"><a href='/roman/science-planning-toolbox' class="offcanvas__section-link" >Science Planning Toolbox</a></li><li class="offcanvas__item hasChildren"><a href='/roman/documentation' class="offcanvas__section-link" >Documentation</a><button class="offcanvas__section-toggle" id="Documentation_82_control" type="button" aria-label="Documentation submenu" aria-controls="Documentation_82_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="Documentation_82_section" class="offcanvas__list" data-level="3" aria-labelledby="Documentation_82_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/roman/documentation/technical-documentation' class="offcanvas__section-link" >Technical Documentation</a></li><li class="offcanvas__item noChildren"><a href='/roman/documentation/science-publications' class="offcanvas__section-link" >Science Publications</a></li><li class="offcanvas__item noChildren"><a href='https://roman-docs.stsci.edu/' class="offcanvas__section-link" target='_blank' >RDox</a></li><li class="offcanvas__item noChildren lastInLevel"><a href='https://archive.stsci.edu/missions-and-data/roman/' class="offcanvas__section-link" target='_blank' >Roman at MAST</a></li></ul></li><li class="offcanvas__item hasChildren lastInLevel"><a href='/roman/news-and-events' class="offcanvas__section-link" >News & Events</a><button class="offcanvas__section-toggle" id="News_and_Events_83_control" type="button" aria-label="News and Events submenu" aria-controls="News_and_Events_83_section" tabindex="-1" aria-expanded="false"><span class="svg-sprite -plus"><svg role="img" aria-label="open section"><use xlink:href="#plus"></use></svg></span><span class="svg-sprite -slider-dash"><svg role="img" aria-label="close section"><use xlink:href="#slider-dash"></use></svg></span></button><ul role="list" id="News_and_Events_83_section" class="offcanvas__list" data-level="3" aria-labelledby="News_and_Events_83_control"><li class="offcanvas__item noChildren firstInLevel"><a href='/roman/news-and-events/news' class="offcanvas__section-link" 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>2018</option> <option value="2017" >2017</option> <option value="2016" >2016</option> <option value="2015" >2015</option> <option value="2014" >2014</option> <option value="2013" >2013</option> <option value="2012" >2012</option> <option value="2011" >2011</option> <option value="2010" >2010</option> <option value="2009" >2009</option> <option value="2008" >2008</option> <option value="2007" >2007</option> <option value="2006" >2006</option> <option value="2005" >2005</option> <option value="2004" >2004</option> <option value="2003" >2003</option> <option value="2002" >2002</option> <option value="2001" >2001</option> <option value="2000" >2000</option> <option value="1999" >1999</option> <option value="1998" >1998</option> <option value="1997" >1997</option> <option value="1996" >1996</option> <option value="1995" >1995</option> <option value="1994" >1994</option> <option value="1993" >1993</option> <option value="1992" >1992</option> <option value="1991" >1991</option> <option value="1990" >1990</option> </select> <div class="filter-bar__wrapper"> <input class="filter-bar__filter" data-filter="text" name="keyword" placeholder="Enter Keyword" value='' type="text" /> <span class="svg-sprite -search"><svg role="img" aria-label="Search Icon" focusable="false"><use xlink:href="#search"></use></svg></span> </div> <select class="filter-bar__filter__hide" data-placeholder="Tag" data-plural="Tags" id="filter-group-Tag" multiple="multiple" data-filter="select" name="Tag" size="1"> <option value="en Español" lang="es">en Español</option> <option value="Wide Field Infrared Survey Telescope" >Wide Field Infrared Survey Telescope</option> <option value="White Dwarfs" >White Dwarfs</option> <option value="Webb Mission" >Webb Mission</option> <option value="Venus" >Venus</option> <option value="Variable Stars" >Variable Stars</option> <option value="Uranus" >Uranus</option> <option value="Universe Age/Size" >Universe Age/Size</option> <option value="Universe" >Universe</option> <option value="ULLYSES" >ULLYSES</option> <option value="Survey" >Survey</option> <option value="Supernovae" >Supernovae</option> <option value="Supernova Remnants" >Supernova Remnants</option> <option value="Stellar Jets" >Stellar Jets</option> <option value="Stellar Disks" >Stellar Disks</option> <option value="Stars" >Stars</option> <option value="Starburst Galaxies" >Starburst Galaxies</option> <option value="Star Forming Regions" >Star Forming Regions</option> <option value="Star Fields" >Star Fields</option> <option value="Star Clusters" >Star Clusters</option> <option value="Spiral Galaxies" >Spiral Galaxies</option> <option value="Spectroscopy" >Spectroscopy</option> <option value="Solar System" >Solar System</option> <option value="Small Solar System Bodies" >Small Solar System Bodies</option> <option value="Saturn" >Saturn</option> <option value="SWEEPS" >SWEEPS</option> <option value="Roman Space Telescope" >Roman Space Telescope</option> <option value="Reflection Nebulas" >Reflection Nebulas</option> <option value="Red Dwarf Stars" >Red Dwarf Stars</option> <option value="Pulsars" >Pulsars</option> <option value="Protostars" >Protostars</option> <option value="Pluto" >Pluto</option> <option value="Planets" >Planets</option> <option value="Planetary Rings" >Planetary Rings</option> <option value="Planetary Nebulas" >Planetary Nebulas</option> <option value="Planetary Atmospheres/Weather" >Planetary Atmospheres/Weather</option> <option value="PHAT" >PHAT</option> <option value="Open Clusters" >Open Clusters</option> <option value="Observatories" >Observatories</option> <option value="Novae" >Novae</option> <option value="Neutron Stars" >Neutron Stars</option> <option value="Neptune" >Neptune</option> <option value="Nebulas" >Nebulas</option> <option value="Nearby Galaxies" >Nearby Galaxies</option> <option value="Multiwavelength" >Multiwavelength</option> <option value="Multiple Star Systems" >Multiple Star Systems</option> <option value="Multimission" >Multimission</option> <option value="Moons" >Moons</option> <option value="Miscellaneous" >Miscellaneous</option> <option value="Milky Way Center" >Milky Way Center</option> <option value="Milky Way" >Milky Way</option> <option value="Medium Deep Survey" >Medium Deep Survey</option> <option value="Massive Stars" >Massive Stars</option> <option value="Mars" >Mars</option> <option value="Magellanic Clouds" >Magellanic Clouds</option> <option value="Kuiper Belt Objects" >Kuiper Belt Objects</option> <option value="Kepler" >Kepler</option> <option value="Jupiter" >Jupiter</option> <option value="Irregular Galaxies" >Irregular Galaxies</option> <option value="Intergalactic Gas" >Intergalactic Gas</option> <option value="Interacting Galaxies" >Interacting Galaxies</option> <option value="Hubble Ultra Deep Field" >Hubble Ultra Deep Field</option> <option value="Hubble Mission" >Hubble Mission</option> <option value="Hubble Deep Field" >Hubble Deep Field</option> <option value="Gravitational Lensing" >Gravitational Lensing</option> <option value="Globular Clusters" >Globular Clusters</option> <option value="Gamma Ray Bursts" >Gamma Ray Bursts</option> <option value="Galaxy Formation" >Galaxy Formation</option> <option value="Galaxy Evolution" >Galaxy Evolution</option> <option value="Galaxy Clusters" >Galaxy Clusters</option> <option value="Galaxies" >Galaxies</option> <option value="Galactic Center Survey" >Galactic Center Survey</option> <option value="GOODS" >GOODS</option> <option value="Frontier Fields" >Frontier Fields</option> <option value="First Galaxies" >First Galaxies</option> <option value="Exoplanets" >Exoplanets</option> <option value="Exomoons" >Exomoons</option> <option value="Emission Nebulas" >Emission Nebulas</option> <option value="Elliptical Galaxies" >Elliptical Galaxies</option> <option value="Earth" >Earth</option> <option value="Early Release Science program" >Early Release Science program</option> <option value="Early Release Observation" >Early Release Observation</option> <option value="Dwarf Planets" >Dwarf Planets</option> <option value="Dwarf Galaxies" >Dwarf Galaxies</option> <option value="Dust" >Dust</option> <option value="Distant Galaxies" >Distant Galaxies</option> <option value="Deep Fields" >Deep Fields</option> <option value="Dark Nebulas" >Dark Nebulas</option> <option value="Dark Matter" >Dark Matter</option> <option value="Dark Energy" >Dark Energy</option> <option value="Cosmology" >Cosmology</option> <option value="Cosmochemistry" >Cosmochemistry</option> <option value="Comets" >Comets</option> <option value="COSMOS" >COSMOS</option> <option value="CLASH" >CLASH</option> <option value="CANDELS" >CANDELS</option> <option value="Brown Dwarfs" >Brown Dwarfs</option> <option value="Bow Shocks" >Bow Shocks</option> <option value="Black Holes" >Black Holes</option> <option value="Binary Stars" >Binary Stars</option> <option value="Astronomy Basics" >Astronomy Basics</option> <option value="Asteroids" >Asteroids</option> <option value="Active Galaxies/Quasars" >Active Galaxies/Quasars</option> </select> <select class="filter-bar__filter__hide" style="display:none;" data-placeholder="Topic" data-plural="Topics" id="filter-group-Topic" multiple="multiple" data-filter="select" name="Topic" size="1"> <option value="101-solar-system">Solar System</option><option value="103-exoplanets">Exoplanets</option><option value="104-stars-and-nebulas">Stars and Nebulas</option><option value="105-galaxies">Galaxies</option><option value="106-universe">Universe</option><option value="107-cosmic-wonders">Cosmic Wonders</option><option value="109-the-telescope">The Telescope</option><option value="02-cosmology">Cosmology</option><option value="03-galaxies">Galaxies</option><option value="04-nebulas">Nebulas</option><option value="05-stars">Stars</option><option value="06-exoplanets">Exoplanets</option><option value="07-solar-system">Solar System</option><option value="08-webb-mission">Webb Mission</option><option value="09-miscellaneous">Miscellaneous</option></select> <select class="filter-bar__filter__hide" data-placeholder="Collection" data-plural="Collections" id="filter-group-Collection" multiple="multiple" data-filter="select" name="Collection" size="1"> <option value="News Nugget" >News Nugget</option> <option value="NASA Science Update" >NASA Science Update</option> <option value="Image Release" >Image Release</option> <option value="Guaranteed Time Observation" >Guaranteed Time Observation</option> <option value="First Images" >First Images</option> <option value="Early Release Science" >Early Release Science</option> <option value="Con traducción al español" lang="es">Con traducción al español</option> <option value="Announcements" >Announcements</option> <option value="American Astronomical Society Meeting" >American Astronomical Society Meeting</option> </select><button class="btn btn-hexagon gold filter-bar__clear-all" type="button" data-clear-all> <span>Clear All</span> </button> </div> <button class="btn btn-hexagon gold" type="button" data-submit-filters> <span>Apply</span> </button> </div> </section> </div> </section> </div> <section id="section-filter-before-results-7e167e3d-f127-4cdd-89bc-4ec7d88f2df0"> <div class="component-block container-fluid"> <div class="filter-bar__before-results"> <div id="filter-bar__items-per-page-7e167e3d-f127-4cdd-89bc-4ec7d88f2df0" class="filter-bar__items-per-page"> <label for="itemsPerPage-7e167e3d-f127-4cdd-89bc-4ec7d88f2df0" id="itemsPerPage-7e167e3d-f127-4cdd-89bc-4ec7d88f2df0_label"> <span>Items per page:</span> <select id="itemsPerPage-7e167e3d-f127-4cdd-89bc-4ec7d88f2df0" class="items-per-page" name="itemsPerPage" data-module-dynamic="selectmenuapply"> <option value="15" selected='selected'>15</option> <option value="25" >25</option> <option value="50" >50</option> <option value="100" >100</option> </select> </label> <strong>(1539 total)</strong> </div> <div data-applied-filters ></div> </div> </div> </section> <div id="matching-items-message-7e167e3d-f127-4cdd-89bc-4ec7d88f2df0" class="sr-only" aria-live="polite"></div> <section id="section-filter-listing-results-7e167e3d-f127-4cdd-89bc-4ec7d88f2df0" data-name="section-filter-listing-results" class="section-row none" data-showing-results="15" data-total-results="1539"> <div class="component-block container-fluid"> <nav class="pagination" aria-labelledby="Pagination-Top"> <h3 id="Pagination-Top" class="sr-only">Pagination Top</h3> <ol role="list" class="no-marker pagination-list" aria-labelledby="Pagination-Top"> <li class="pagination-link pagination-link__first disabled" aria-hidden='true'> <span class="sr-only-mobile">First</span> <span class="sr-only">Page</span> </li> <li class="pagination-link pagination-link__previous disabled" aria-hidden='true'> <span class="sr-only-mobile">Previous</span> <span class="sr-only">Page</span> </li> <li class="pagination-link " aria-current='page'> <a href="javascript:void(0)" data-form-data="itemsPerPage=15&page=1"> <span class="sr-only">Page</span> 1</a> </li> <li class="pagination-link " > <a href="javascript:void(0)" data-form-data="itemsPerPage=15&page=2"> <span class="sr-only">Page</span> 2</a> </li> <li class="pagination-link " > <a href="javascript:void(0)" data-form-data="itemsPerPage=15&page=3"> <span class="sr-only">Page</span> 3</a> </li> <li class="pagination-link " > <a href="javascript:void(0)" data-form-data="itemsPerPage=15&page=4"> <span class="sr-only">Page</span> 4</a> </li> <li class="pagination-link hide-mobile" > <a href="javascript:void(0)" data-form-data="itemsPerPage=15&page=5"> <span class="sr-only">Page</span> 5</a> </li> <li class="pagination-link pagination-link__next " > <a href="javascript:void(0)" data-form-data="itemsPerPage=15&page=2"> <span class="sr-only-mobile">Next</span> <span class="sr-only">Page</span> </a> </li> <li class="pagination-link pagination-link__last " > <a href="javascript:void(0)" data-form-data="itemsPerPage=15&page=103"> <span class="sr-only-mobile">Last</span> <span class="sr-only">Page</span> </a> </li> </ol> </nav> <h3 id="h3-sr-only-7e167e3d-f127-4cdd-89bc-4ec7d88f2df0" data-name="h3-sr-only-filter-listing-results" class="sr-only" data-include-in-navigation="false"> Filter Results</h3> <div data-module-dynamic="news-listing item-numbering" data-item-numbering='{ "event-item" : 9, "listing-item" : 15 }'> <ol role="list" class="no-marker" aria-labelledby="h3-sr-only-7e167e3d-f127-4cdd-89bc-4ec7d88f2df0"> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-f8bc777b-a1d4-46ab-95a0-271c5bb1583c" aria-describedby="card-read-more-f8bc777b-a1d4-46ab-95a0-271c5bb1583c"> <a class="card-link" href="/contents/news-releases/2025/news-2025-114"> NASA's Webb Images Young, Giant Exoplanets, Detects Carbon Dioxide</a> </h4> <div class="news-release-information"><span class="news-release-date">March 17, 2025</span><span class="news-release-id">Release ID: 2025-114</span> <span class="news-release-missions"> Missions: Webb</span> </div> <p> Findings suggest giant exoplanets in HR 8799 system likely formed like Jupiter and Saturn.</p><span id="card-read-more-f8bc777b-a1d4-46ab-95a0-271c5bb1583c" data-href="/contents/news-releases/2025/news-2025-114" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="This image shows the planetary system HR 8799. The background is black. At the center there is a symbol representing a star labeled HR 8799. The star’s light is blocked. There are four exoplanets, which look like fuzzy dots, pictured surrounding the star. Furthest from the star is a fuzzy, faint blue dot, labeled b, at the 10 o’clock position. At the 1 o’clock position, second furthest from the star is a blueish-white fuzzy dot labeled c. Just below that is an orange dot labeled e. At the 4 o’clock position, still near the star, is another fuzzy white dot labeled d." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JNH68NQSKK3352G6EKG4MPYM.png" /></picture><noscript><img alt="This image shows the planetary system HR 8799. The background is black. At the center there is a symbol representing a star labeled HR 8799. The star’s light is blocked. There are four exoplanets, which look like fuzzy dots, pictured surrounding the star. Furthest from the star is a fuzzy, faint blue dot, labeled b, at the 10 o’clock position. At the 1 o’clock position, second furthest from the star is a blueish-white fuzzy dot labeled c. Just below that is an orange dot labeled e. At the 4 o’clock position, still near the star, is another fuzzy white dot labeled d." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JNH68NQSKK3352G6EKG4MPYM.png" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-afa62947-8d58-4083-905d-1a5dd2410774" aria-describedby="card-read-more-afa62947-8d58-4083-905d-1a5dd2410774"> <a class="card-link" href="/contents/news-releases/2025/news-2025-105"> NASA's Webb Peers Deeper into Mysterious Flame Nebula</a> </h4> <div class="news-release-information"><span class="news-release-date">March 10, 2025</span><span class="news-release-id">Release ID: 2025-105</span> <span class="news-release-missions"> Missions: Webb</span> </div> <p> New population census answers the question: How small can you go when forming stars and brown dwarfs?</p><span id="card-read-more-afa62947-8d58-4083-905d-1a5dd2410774" data-href="/contents/news-releases/2025/news-2025-105" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="A collage of three near-infrared images showing a dusty nebula. The left two-thirds of the collage is taken up by a Hubble image of the nebula. The remaining third is taken up by two Webb images, one atop the other. The Hubble image has a pillar of dense brown dust running through the nebula at a diagonal from 5 o’clock to 11 o’clock. Wispy plumes appear to fly off from the pillar toward the sides amid blue clouds of the same material, which are whiter near the pillar. There are many white stars spread throughout. Two separate, white squares, tilted about 30 degrees, outline two areas in the pillar. The upper square has the letter “A” to the top right, while the lower square is marked by the letter “B”. These labels correspond to the two, magnified images of the nebula at right, with the top image also labeled “A” and the bottom image labeled “B”. Both images contain a mixture of reds, blues and browns, and show red, blue, and white stars." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JKRRQBT33DDPKSEN303A8T0Y.png" /></picture><noscript><img alt="A collage of three near-infrared images showing a dusty nebula. The left two-thirds of the collage is taken up by a Hubble image of the nebula. The remaining third is taken up by two Webb images, one atop the other. The Hubble image has a pillar of dense brown dust running through the nebula at a diagonal from 5 o’clock to 11 o’clock. Wispy plumes appear to fly off from the pillar toward the sides amid blue clouds of the same material, which are whiter near the pillar. There are many white stars spread throughout. Two separate, white squares, tilted about 30 degrees, outline two areas in the pillar. The upper square has the letter “A” to the top right, while the lower square is marked by the letter “B”. These labels correspond to the two, magnified images of the nebula at right, with the top image also labeled “A” and the bottom image labeled “B”. Both images contain a mixture of reds, blues and browns, and show red, blue, and white stars." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JKRRQBT33DDPKSEN303A8T0Y.png" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-92259753-a306-4d72-a5b4-45ad017e6b74" aria-describedby="card-read-more-92259753-a306-4d72-a5b4-45ad017e6b74"> <a class="card-link" href="/contents/news-releases/2025/news-2025-111"> NASA Webb Wows With Incredible Detail in Actively Forming Star System</a> </h4> <div class="news-release-information"><span class="news-release-date">March 07, 2025</span><span class="news-release-id">Release ID: 2025-111</span> <span class="news-release-missions"> Missions: Webb</span> </div> <p> This near-infrared image shows the history of ejections from the two actively forming stars in Lynds 483.</p><span id="card-read-more-92259753-a306-4d72-a5b4-45ad017e6b74" data-href="/contents/news-releases/2025/news-2025-111" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="At the center is a thin vertical cloud known as Lynds 483 (L483) that is roughly shaped like an hourglass with irregular edges. The lower lobe is slightly cut off. The top lobe is seen in full, petering out at the top." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JM03AA7MNW8WWXBDPVXAVACM.png" /></picture><noscript><img alt="At the center is a thin vertical cloud known as Lynds 483 (L483) that is roughly shaped like an hourglass with irregular edges. The lower lobe is slightly cut off. The top lobe is seen in full, petering out at the top." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JM03AA7MNW8WWXBDPVXAVACM.png" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-4c7d52a6-3bf0-4ce6-9522-1671f8b8fb8f" aria-describedby="card-read-more-4c7d52a6-3bf0-4ce6-9522-1671f8b8fb8f"> <a class="card-link" href="/contents/news-releases/2025/news-2025-007"> NASA's Hubble Finds Kuiper Belt Duo May Be Trio</a> </h4> <div class="news-release-information"><span class="news-release-date">March 04, 2025</span><span class="news-release-id">Release ID: 2025-007</span> <span class="news-release-missions"> Missions: Hubble</span> </div> <p> A potential triple system of Kuiper Belt objects, only the second ever found, would support the theory that these rocky bodies form by gravitational collapse, like stars.</p><span id="card-read-more-4c7d52a6-3bf0-4ce6-9522-1671f8b8fb8f" data-href="/contents/news-releases/2025/news-2025-007" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="Illustration of two large, cratered rocks in the foreground right. Another rock is seen in the distance to the left. The black background of space shows the hazy Sun and zodiacal light due to dust in the solar system, as well as scattered distant stars. The words "Artist's Concept" appear in gray at the bottom left." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01HXVS1V8YBQME4BFETCFDZ9KF.jpg" /></picture><noscript><img alt="Illustration of two large, cratered rocks in the foreground right. Another rock is seen in the distance to the left. The black background of space shows the hazy Sun and zodiacal light due to dust in the solar system, as well as scattered distant stars. The words "Artist's Concept" appear in gray at the bottom left." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01HXVS1V8YBQME4BFETCFDZ9KF.jpg" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-56d066e4-f8e2-4542-9ff2-6423e36b5b81" aria-describedby="card-read-more-56d066e4-f8e2-4542-9ff2-6423e36b5b81"> <a class="card-link" href="/contents/news-releases/2025/news-2025-106"> NASA's Webb Exposes Complex Atmosphere of Starless Super-Jupiter</a> </h4> <div class="news-release-information"><span class="news-release-date">March 03, 2025</span><span class="news-release-id">Release ID: 2025-106</span> <span class="news-release-missions"> Missions: Webb</span> </div> <p> Webb has captured evidence for patchy cloud layers, high-altitude hot spots, and variations in chemistry around a rapidly rotating, free-floating object 20 light-years from Earth. </p><span id="card-read-more-56d066e4-f8e2-4542-9ff2-6423e36b5b81" data-href="/contents/news-releases/2025/news-2025-106" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="Illustration of a gas giant planet or brown dwarf on a background of distant stars." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JMZ7T35STFWQ07R0KEFDX46M.jpg" /></picture><noscript><img alt="Illustration of a gas giant planet or brown dwarf on a background of distant stars." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JMZ7T35STFWQ07R0KEFDX46M.jpg" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-5ebb1b30-3d21-45a3-8844-75d5bc0e0998" aria-describedby="card-read-more-5ebb1b30-3d21-45a3-8844-75d5bc0e0998"> <a class="card-link" href="/contents/news-releases/2025/news-2025-009"> NASA's Hubble Provides Bird's-Eye View of Andromeda Galaxy's Ecosystem</a> </h4> <div class="news-release-information"><span class="news-release-date">February 27, 2025</span><span class="news-release-id">Release ID: 2025-009</span> <span class="news-release-missions"> Missions: Hubble</span> </div> <p> A Swarm of Dwarf Galaxies Buzz Around Our Milky Way's Twin</p><span id="card-read-more-5ebb1b30-3d21-45a3-8844-75d5bc0e0998" data-href="/contents/news-releases/2025/news-2025-009" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="Telescope image with infographic overlays. At top left the text reads, Hubble Space Telescope, Survey of Andromeda's Satellite galaxies. A large field of galaxies take up the left three-quarters. This portion shows hundreds scattered across the black background of space. Most are tiny white dots. Thirty-six tiny galaxies are circled in yellow. Four have labels. From top to bottom, left to right: NGC 185, NGC 147, NGC 205 (M110), NGC 221 (M32). NGC 221 appears slightly lower than a larger, angled oblong galaxy, which is labeled Andromeda Galaxy (M31). Along the right is a column separated into four boxes, each a zoomed in portrait of the labeled galaxies. From top to bottom: NGC 185 looks like a dim blue haze that takes up most of the frame; NGC 147 like a small, very dim oval, with scattered dots nearby; NGC 221 is large and bright white, and takes up most of the box; NGC 205 is not quite as large as NGC 221, and is pinker, with larger dots throughout the frame." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JMFY6RNSRTRQ4ZPB75XPXCGB.jpg" /></picture><noscript><img alt="Telescope image with infographic overlays. At top left the text reads, Hubble Space Telescope, Survey of Andromeda's Satellite galaxies. A large field of galaxies take up the left three-quarters. This portion shows hundreds scattered across the black background of space. Most are tiny white dots. Thirty-six tiny galaxies are circled in yellow. Four have labels. From top to bottom, left to right: NGC 185, NGC 147, NGC 205 (M110), NGC 221 (M32). NGC 221 appears slightly lower than a larger, angled oblong galaxy, which is labeled Andromeda Galaxy (M31). Along the right is a column separated into four boxes, each a zoomed in portrait of the labeled galaxies. From top to bottom: NGC 185 looks like a dim blue haze that takes up most of the frame; NGC 147 like a small, very dim oval, with scattered dots nearby; NGC 221 is large and bright white, and takes up most of the box; NGC 205 is not quite as large as NGC 221, and is pinker, with larger dots throughout the frame." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JMFY6RNSRTRQ4ZPB75XPXCGB.jpg" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-edf87583-25f9-43f1-a100-135362965ba3" aria-describedby="card-read-more-edf87583-25f9-43f1-a100-135362965ba3"> <a class="card-link" href="/contents/news-releases/2025/news-2025-110"> Webb Reveals Rapid-Fire Light Show From Milky Way's Central Black Hole</a> </h4> <div class="news-release-information"><span class="news-release-date">February 18, 2025</span><span class="news-release-id">Release ID: 2025-110</span> <span class="news-release-missions"> Missions: Webb</span> </div> <p> Observations revealed ongoing fireworks featuring short bursts and longer flares.</p><span id="card-read-more-edf87583-25f9-43f1-a100-135362965ba3" data-href="/contents/news-releases/2025/news-2025-110" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="A large, black circle representing a black hole occupies the right third of the frame in this illustration. Thick, clumpy orange streaks arc above and below it, essentially surrounding it. The top arc extends down to the lower left and then curves around in front of the black hole to form a disk that is tilted toward the viewer. Near the inner edge of the disk, several bright, whiter spots have blue filaments looping above them, representing flares. The words “Artist’s Concept” appear below the illustration." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JKREW93PPANKR13RF1WQKH7Y.png" /></picture><noscript><img alt="A large, black circle representing a black hole occupies the right third of the frame in this illustration. Thick, clumpy orange streaks arc above and below it, essentially surrounding it. The top arc extends down to the lower left and then curves around in front of the black hole to form a disk that is tilted toward the viewer. Near the inner edge of the disk, several bright, whiter spots have blue filaments looping above them, representing flares. The words “Artist’s Concept” appear below the illustration." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JKREW93PPANKR13RF1WQKH7Y.png" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-a52f0c03-be96-4930-ba79-b9bd1cbeec4e" aria-describedby="card-read-more-a52f0c03-be96-4930-ba79-b9bd1cbeec4e"> <a class="card-link" href="/contents/news-releases/2025/news-2025-107"> Webb Maps Full Picture of How Phoenix Galaxy Cluster Forms Stars</a> </h4> <div class="news-release-information"><span class="news-release-date">February 13, 2025</span><span class="news-release-id">Release ID: 2025-107</span> <span class="news-release-missions"> Missions: Webb</span> </div> <p> Discovery proves decades-old theory of galaxy feeding cycle.</p><span id="card-read-more-a52f0c03-be96-4930-ba79-b9bd1cbeec4e" data-href="/contents/news-releases/2025/news-2025-107" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="A galaxy cluster. The center of the cluster is bright white with short red jets that point toward the top right and bottom left, and several blue filaments that spread throughout the center. Outside the bright center is purple gas that is bright toward the center of the image and dimmer further from the center. There are contour lines overlayed in different colors. A key on the bottom indicates what each outline is representing. On the left side of the key, green irregular concentric lines shaped like a mountain on a topographic map are shown with the text cooling gas. Those same contours are placed overtop the center of the galaxy cluster. At the right side of the key, purple dashed lines are shaped in two ovals with the text jet-inflated bubbles. These oval outlines are place above and below the green contours at the center of the image." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JKDQABVK79V1BBDZ8KHSDTJ9.jpg" /></picture><noscript><img alt="A galaxy cluster. The center of the cluster is bright white with short red jets that point toward the top right and bottom left, and several blue filaments that spread throughout the center. Outside the bright center is purple gas that is bright toward the center of the image and dimmer further from the center. There are contour lines overlayed in different colors. A key on the bottom indicates what each outline is representing. On the left side of the key, green irregular concentric lines shaped like a mountain on a topographic map are shown with the text cooling gas. Those same contours are placed overtop the center of the galaxy cluster. At the right side of the key, purple dashed lines are shaped in two ovals with the text jet-inflated bubbles. These oval outlines are place above and below the green contours at the center of the image." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JKDQABVK79V1BBDZ8KHSDTJ9.jpg" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-85d1d1a4-f44c-4a31-94ad-156c471d344a" aria-describedby="card-read-more-85d1d1a4-f44c-4a31-94ad-156c471d344a"> <a class="card-link" href="/contents/news-releases/2025/news-2025-006"> Straight Shot: Hubble Investigates Galaxy with Nine Rings</a> </h4> <div class="news-release-information"><span class="news-release-date">February 04, 2025</span><span class="news-release-id">Release ID: 2025-006</span> <span class="news-release-missions"> Missions: Hubble</span> </div> <p> Hubble’s high-resolution imagery allowed researchers to hone in on more of the Bullseye galaxy’s rings — and helped confirm which galaxy dove through its core.</p><span id="card-read-more-85d1d1a4-f44c-4a31-94ad-156c471d344a" data-href="/contents/news-releases/2025/news-2025-006" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="A large galaxy is at center, and a significantly smaller galaxy is to its immediate left. Both are set on the black background of space, which is dotted with a range of galaxies in different shapes and sizes, along with a few foreground stars." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JJADMXSS90D5ZYY7XDAP9DJV.jpg" /></picture><noscript><img alt="A large galaxy is at center, and a significantly smaller galaxy is to its immediate left. Both are set on the black background of space, which is dotted with a range of galaxies in different shapes and sizes, along with a few foreground stars." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JJADMXSS90D5ZYY7XDAP9DJV.jpg" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-1b746eed-5831-4858-a7d0-a48211cfa257" aria-describedby="card-read-more-1b746eed-5831-4858-a7d0-a48211cfa257"> <a class="card-link" href="/contents/news-releases/2025/news-2025-401"> This Tiny Galaxy Is Answering Some Big Questions</a> </h4> <div class="news-release-information"><span class="news-release-date">January 16, 2025</span><span class="news-release-id">Release ID: 2025-401</span> <span class="news-release-missions"> Missions: STScI</span> </div> <p> Researchers used the James Webb Space Telescope to reveal patterns of star formation in an isolated dwarf galaxy.</p><span id="card-read-more-1b746eed-5831-4858-a7d0-a48211cfa257" data-href="/contents/news-releases/2025/news-2025-401" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="A concentration of bright blue stars occupies the bottom right corner of the image. At bottom center within them is a small blue bubble. The stars and bubble are part of a diffuse dwarf galaxy that extends beyond the image border. Background galaxies are scattered across the image, with some particularly prominent spirals located at upper left and upper right. The background of space is black." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JH0V1P4YE8MA5MK0X4XRQJ00.jpg" /></picture><noscript><img alt="A concentration of bright blue stars occupies the bottom right corner of the image. At bottom center within them is a small blue bubble. The stars and bubble are part of a diffuse dwarf galaxy that extends beyond the image border. Background galaxies are scattered across the image, with some particularly prominent spirals located at upper left and upper right. The background of space is black." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JH0V1P4YE8MA5MK0X4XRQJ00.jpg" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-fc1941cb-58ed-4c3d-9f88-78f93cdffc34" aria-describedby="card-read-more-fc1941cb-58ed-4c3d-9f88-78f93cdffc34"> <a class="card-link" href="/contents/news-releases/2025/news-2025-005"> NASA's Hubble Traces Hidden History of Andromeda Galaxy</a> </h4> <div class="news-release-information"><span class="news-release-date">January 16, 2025</span><span class="news-release-id">Release ID: 2025-005</span> <span class="news-release-missions"> Missions: Hubble</span> </div> <p> Panorama of Nearest Galaxy Unveils Hundreds of Millions of Stars</p><span id="card-read-more-fc1941cb-58ed-4c3d-9f88-78f93cdffc34" data-href="/contents/news-releases/2025/news-2025-005" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="The Andromeda galaxy, a spiral galaxy, spreads across the width. It is tilted nearly edge-on to our line of sight so that it appears as an extreme oval on its side. The borders of the galaxy are jagged because the image is a mosaic of smaller, square images. The outer edges are blue, while the inner two-thirds are yellowish with a bright, central core. Dark, dusty filamentary clouds wrap around the outer half of the galaxy’s disk. At 10 o'clock, a smaller dwarf elliptical galaxy forms a fuzzy, yellow blob. Hubble's sharp vision distinguishes about 200 million stars within the image. The background of space is black. There are what appears to be steps toward the bottom, mainly toward the middle, which indicates where no data were taken." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JHEHT4SWRCPVK8M5WCB96GZR.jpg" /></picture><noscript><img alt="The Andromeda galaxy, a spiral galaxy, spreads across the width. It is tilted nearly edge-on to our line of sight so that it appears as an extreme oval on its side. The borders of the galaxy are jagged because the image is a mosaic of smaller, square images. The outer edges are blue, while the inner two-thirds are yellowish with a bright, central core. Dark, dusty filamentary clouds wrap around the outer half of the galaxy’s disk. At 10 o'clock, a smaller dwarf elliptical galaxy forms a fuzzy, yellow blob. Hubble's sharp vision distinguishes about 200 million stars within the image. The background of space is black. There are what appears to be steps toward the bottom, mainly toward the middle, which indicates where no data were taken." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JHEHT4SWRCPVK8M5WCB96GZR.jpg" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-8a9f3a78-453b-4a94-a45c-14a0d2fad4c4" aria-describedby="card-read-more-8a9f3a78-453b-4a94-a45c-14a0d2fad4c4"> <a class="card-link" href="/contents/news-releases/2025/news-2025-001"> NASA Celebrates Edwin Hubble's Discovery of a New Universe</a> </h4> <div class="news-release-information"><span class="news-release-date">January 15, 2025</span><span class="news-release-id">Release ID: 2025-001</span> <span class="news-release-missions"> Missions: Hubble</span> </div> <p> Pinpointing a Milepost Marker Star that Opened the Realm of Galaxies</p><span id="card-read-more-8a9f3a78-453b-4a94-a45c-14a0d2fad4c4" data-href="/contents/news-releases/2025/news-2025-001" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="A Hubble image of the Andromeda galaxy, tilted from the bottom left to top right. The outer edges of the galaxy are blue, while the inner two-thirds is yellowish with a bright, central core. Four inset boxes form an arc along the top portion of the galaxy, each showing a bright white star in the center surrounded by other stars. Each box has a correlating date at the bottom: Dec. 17, 2020, Dec. 21, 2010, Dec. 30, 2019, and Jan. 26, 2011. The center star in the boxes appears brighter with each passing date. An arrow from galaxy’s right center spiral arm points to the boxes, indicating where the star originates in the galaxy." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JH0TB2K7DCRGYDZES1KXNCJ4.png" /></picture><noscript><img alt="A Hubble image of the Andromeda galaxy, tilted from the bottom left to top right. The outer edges of the galaxy are blue, while the inner two-thirds is yellowish with a bright, central core. Four inset boxes form an arc along the top portion of the galaxy, each showing a bright white star in the center surrounded by other stars. Each box has a correlating date at the bottom: Dec. 17, 2020, Dec. 21, 2010, Dec. 30, 2019, and Jan. 26, 2011. The center star in the boxes appears brighter with each passing date. An arrow from galaxy’s right center spiral arm points to the boxes, indicating where the star originates in the galaxy." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JH0TB2K7DCRGYDZES1KXNCJ4.png" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-c08bc4ae-61d3-4af5-974f-90c8294370eb" aria-describedby="card-read-more-c08bc4ae-61d3-4af5-974f-90c8294370eb"> <a class="card-link" href="/contents/news-releases/2025/news-2025-102"> NASA's Webb Reveals Intricate Layers of Interstellar Dust, Gas</a> </h4> <div class="news-release-information"><span class="news-release-date">January 14, 2025</span><span class="news-release-id">Release ID: 2025-102</span> <span class="news-release-missions"> Missions: Webb</span> </div> <p> A supernova flashbulb illuminated otherwise unseen material between the stars.</p><span id="card-read-more-c08bc4ae-61d3-4af5-974f-90c8294370eb" data-href="/contents/news-releases/2025/news-2025-102" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="Three rows show Webb images of the same region taken on three different dates. The top row is labeled August 19, 2024. The middle row is labeled September 16, 2024. The bottom row is labeled September 30, 2024. Each row shows two images split by a vertical black bar where there is no data. Each image is speckled with dozens of white stars, some showing Webb’s signature 8-point diffraction spikes, against the black background of space. The images also show tightly packed, glowing red filaments that resemble muscle fibers or wood grain. While the background stars are the same in every row, the filaments change noticeably. In the top row, the filaments extend horizontally from upper left to lower right. In the middle and bottom rows, the filaments extend from lower left to upper right, and seem to shift slightly downward in position, with the last the lowest." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JFG61B1CCT1HV15F8HQ99RSZ.jpg" /></picture><noscript><img alt="Three rows show Webb images of the same region taken on three different dates. The top row is labeled August 19, 2024. The middle row is labeled September 16, 2024. The bottom row is labeled September 30, 2024. Each row shows two images split by a vertical black bar where there is no data. Each image is speckled with dozens of white stars, some showing Webb’s signature 8-point diffraction spikes, against the black background of space. The images also show tightly packed, glowing red filaments that resemble muscle fibers or wood grain. While the background stars are the same in every row, the filaments change noticeably. In the top row, the filaments extend horizontally from upper left to lower right. In the middle and bottom rows, the filaments extend from lower left to upper right, and seem to shift slightly downward in position, with the last the lowest." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JFG61B1CCT1HV15F8HQ99RSZ.jpg" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-365a01b9-6ea2-4093-a3aa-2f0c2a3abe6c" aria-describedby="card-read-more-365a01b9-6ea2-4093-a3aa-2f0c2a3abe6c"> <a class="card-link" href="/contents/news-releases/2025/news-2025-101"> Newfound Galaxy Class May Indicate Early Black Hole Growth, Webb Finds</a> </h4> <div class="news-release-information"><span class="news-release-date">January 14, 2025</span><span class="news-release-id">Release ID: 2025-101</span> <span class="news-release-missions"> Missions: Webb</span> </div> <p> Scientists compile large sample of an unusual class of objects in an effort to connect the dots to the early universe.</p><span id="card-read-more-365a01b9-6ea2-4093-a3aa-2f0c2a3abe6c" data-href="/contents/news-releases/2025/news-2025-101" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="Six Webb images of little red dots are combined in a two-row mosaic. Each little red dot is centered within a square frame and lies against the black background of space. Each dot has a yellow-white circular core surrounded by a red, fuzzy ring. White text in the top left corner of each box lists the source’s name from the Webb surveys, and its redshift. From left to right, the top row reads CEERS 14448, z = 4.75; NGDEEP 4321, z = 8.92; and PRIMER-COS 10539, z = 7.48. The bottom row reads CEERS 20320, z = 5.27; JADES 9186, z = 4.99; and PRIMER-UDS 17818, z = 6.40." class="lazyload embedded-img__component" loading="lazy" src="//stsci-opo.org/STScI-01JHGDMH8CB1MEXBEW6AJEVXHZ.jpg" /></picture><noscript><img alt="Six Webb images of little red dots are combined in a two-row mosaic. Each little red dot is centered within a square frame and lies against the black background of space. Each dot has a yellow-white circular core surrounded by a red, fuzzy ring. White text in the top left corner of each box lists the source’s name from the Webb surveys, and its redshift. From left to right, the top row reads CEERS 14448, z = 4.75; NGDEEP 4321, z = 8.92; and PRIMER-COS 10539, z = 7.48. The bottom row reads CEERS 20320, z = 5.27; JADES 9186, z = 4.99; and PRIMER-UDS 17818, z = 6.40." class="noscript-img embedded-img__component" src="//stsci-opo.org/STScI-01JHGDMH8CB1MEXBEW6AJEVXHZ.jpg" /></noscript></div> </div> </div></li> <li> <div class="news-listing card" data-module-dynamic="card"> <div class="row"> <div class="text col-sm-8 "> <h4 id="press-release-14803fd3-b0dc-4129-9131-f928b0a0beac" aria-describedby="card-read-more-14803fd3-b0dc-4129-9131-f928b0a0beac"> <a class="card-link" href="/contents/news-releases/2025/news-2025-103"> Webb Watches Carbon-Rich Dust Shells Form, Expand in Star System</a> </h4> <div class="news-release-information"><span class="news-release-date">January 13, 2025</span><span class="news-release-id">Release ID: 2025-103</span> <span class="news-release-missions"> Missions: Webb</span> </div> <p> The telescope shows that the winds of two massive stars are producing carbon-rich dust, which may eventually “seed” new stars and planets.</p><span id="card-read-more-14803fd3-b0dc-4129-9131-f928b0a0beac" data-href="/contents/news-releases/2025/news-2025-103" class="arrow-link" aria-hidden="true">Read the release</span> </div> <div class="img col-sm-4"> <picture ><img alt="A three-part graphic showing observations of Wolf-Rayet 140, two massive stars with 17 dust shells around them. 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