Gnomon, Lunar, Apollo | National Air and Space Museum

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</defs> </svg> <outline-grid gap-size="small" x-padding="" y-padding="" full-bleed="" slot="iiif-modal"> <outline-column col-span-default="12" class="items-center"> IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. </outline-column> <outline-column col-span-default="12" class="items-center"> More - </outline-column> <outline-column col-span-default="12" class="items-center"> <outline-link> <a href="https://iiif.si.edu/" target="_blank">https://iiif.si.edu</a> </outline-link> </outline-column> <outline-column col-span-default="12"> <outline-link> <a href="https://ids.si.edu/ids/manifest/NASM-A19810890000cp01" target="_blank">View Manifest</a> </outline-link> </outline-column> <outline-column col-span-default="12"> <outline-link> <a href="https://iiif.si.edu/mirador/?manifest=https%3A%2F%2Fids.si.edu%2Fids%2Fmanifest%2FNASM-A19810890000cp01" target="_blank">View in Mirador Viewer</a> </outline-link> </outline-column> </outline-grid> </outline-gallery-slide> <outline-gallery-slide slot="image" data-type="image" detail-page-path="/multimedia-gallery/5275hjpg" image-high-version-path="/sites/default/files/images/5275h.jpg"> <outline-image slot="slide" image-label="Apollo 17 Gnomon" image-href="/sites/default/files/styles/body_large/public/images/5275h.jpg?itok=059D_V1Y"></outline-image> <outline-styled-text slot="conditions">Usage conditions may apply</outline-styled-text> <outline-gallery-download-item text="Download Image" slot="download-item" data-type="download" path="/sites/default/files/images/5275h.jpg"></outline-gallery-download-item> </outline-gallery-slide> </outline-gallery> </outline-container> <outline-container x-padding y-padding class="pb-8"> <outline-grid gap-size="medium"> <outline-column col-span-default="12" col-span-md="8" class=" justify-self-center" content-align="top"> <nasm-styled-text> <p>This gnomon is like those used on the lunar surface by Apollo astronauts during their scientific and photographic tasks. A gnomon is a gimbaled stadia rod mounted on a tripod so that the rod was free to point vertically. When deployed on the lunar surface, the shadow cast by the staff indicated sun angle and, therefore, direction. The rod length and the painted scale provided a reference for estimating the sizes of nearby objects. Shades of gray on the rod ranged in reflectivity from 5% to 35% and a color scale enabled more accurate determination of rock and soil colors by comparison.</p> <p>The gnomon configuration was a little different for each Apollo flight. This particular gnomon was qualified for flight, but never used on a mission. It is similar to the one used on the early lunar missions (Apollo 11, 12, and 14) because it has color scales affixed to the rod and not the legs.</p> <p>NASA transferred this to the Smithsonian in 1974.</p> </nasm-styled-text> </outline-column> <outline-column col-span-default="12" col-span-md="4" content-align="top" class="pl-8 pt-8 border-l-outline-not-gray border-l-2"> <outline-heading level="h6" level-size="base" level-style="semibold" font-family="accent" >Display Status</outline-heading> <p>This object is not on display at the National Air and Space Museum. It is either on loan or in storage.</p> </outline-column> </outline-grid> </outline-container> <section class="c-section u-spaced-bottom-5"> <div class="l-constrain"> <div class="c-section__content"> </div> </div> </section> <outline-container x-padding y-padding container-align="top"> <div class="flex"> <outline-heading level="h4" level-size="3xl" level-style="medium" class="mb-8">Object Details</outline-heading> <span class="text-brand-space inline ml-4 mt-1"> <outline-link aria-label="Download Text File" link-href="https://ids.si.edu/ids/media_view?id=NASM-A19810890000cp01&format=text"> <outline-icon class="text-brand-space" name="get_app" library="material" size="1.5rem"> </outline-icon> </outline-link> </span> </div> <outline-grid gap-size-md="medium"> <outline-column col-span-md="4" content-align="top"> <outline-heading level="h6" level-size="xl" level-style="medium" font-family="accent">Country of Origin</outline-heading> <nasm-styled-text class="mb-8"> United States of America </nasm-styled-text> <outline-heading level="h6" level-size="xl" level-style="medium" font-family="accent">Type</outline-heading> <nasm-styled-text class="mb-8"> EQUIPMENT-Photographic </nasm-styled-text> <outline-heading level="h6" level-size="xl" level-style="medium" font-family="accent">Manufacturer</outline-heading> <nasm-styled-text class="mb-8"> NASA Manned Spacecraft Center<br/> </nasm-styled-text> </outline-column> <outline-column col-span-md="4" content-align="top"> <outline-heading level="h6" level-size="xl" level-style="medium" font-family="accent">Dimensions</outline-heading> <nasm-styled-text class="mb-8"> Overall (deployed): 2ft 7/16in. x 1ft 8 7/8in., 0.6lb. (62 x 53cm, 0.3kg)<br/> </nasm-styled-text> <outline-heading level="h6" level-size="xl" level-style="medium" font-family="accent">Materials</outline-heading> <nasm-styled-text class="mb-8"> Aluminum, paint<br/> </nasm-styled-text> </outline-column> <outline-column col-span-md="4" content-align="top"> <outline-heading level="h6" level-size="xl" level-style="medium" font-family="accent">Inventory Number</outline-heading> <nasm-styled-text class="mb-8"> A19810890000 </nasm-styled-text> <outline-heading level="h6" level-size="xl" level-style="medium" font-family="accent">Credit Line</outline-heading> <nasm-styled-text class="mb-8"> Transferred from NASA, Johnson Space Center </nasm-styled-text> <outline-heading level="h6" level-size="xl" level-style="medium" font-family="accent">Data Source</outline-heading> <nasm-styled-text class="mb-8"> National Air and Space Museum </nasm-styled-text> <outline-heading level="h6" level-size="xl" level-style="medium" font-family="accent">Restrictions & Rights</outline-heading> <nasm-styled-text class="mb-8"> Usage conditions apply <br/> For more information, visit the Smithsonians <a href="https://www.si.edu/Termsofuse">Terms of Use</a>. </nasm-styled-text> </outline-column> </outine-grid> </outline-container>  </main> <div class="nasm-footer-container"> <div class="nasm-footer-left"> <div class="nasm-footer-logo"> <a href="/" target="_blank" aria-label="go to the Air and Space homepage"> <span class="nasm-logo"> <svg viewBox="0 0 430 113" fill="none" xmlns="//www.w3.org/2000/svg"> <g clip-path="url(#clip0_2472_145888)" fill="currentColor"> <path d="m38.84 84.88 11.13-9.312L71.207 57.99l-.113-.35-20.556 9.43-22.032-18.393a.886.886 0 0 1 0-1.396c1.93-1.397 6.473-4.54 9.653-4.657 9.653-.466 38.84 0 47.13-4.074 7.382-3.609 21.578-12.34 29.415-17.229-19.875-24.795-55.535-28.52-79.952-8.265C11.357 32.38 6.928 66.837 23.736 91.75l-22.6 18.742c1.476 1.862 4.202 2.211 6.132.698l19.08-15.831L38.84 84.88Zm93.126-68.565L30.776 100.13a76.497 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3.726l-2.044 1.63Zm22.713-5.122v2.561h-10.789v7.217h9.767v2.561h-9.767v8.033h10.789v2.561h-13.514v-23.05h13.514v.117Zm22.487 0v13.62c0 6.868-3.18 9.662-8.177 9.662s-8.177-2.794-8.177-9.662V88.836h2.84v13.852c0 5.006 1.93 6.985 5.337 6.985s5.338-1.979 5.338-6.985V88.952h2.839Zm15.672 16.878 6.701-16.88h2.725V112h-2.839V95.12l-5.451 14.668h-2.499l-5.337-14.552V112h-2.839V88.95h2.725l6.814 16.88Z"/> </g> <defs> <clipPath id="clip0_2472_145888"> <path fill="#fff" d="M0 0h452v167.63H0z"/> </clipPath> </defs> </svg> </span> </a> </div> <div class="nasm-footer-email"> <div class="nasm-styled-text outline-heading"> Stay up to date on the latest stories and events with our newsletter </div> <div class="contactform"> <form action="https://support.si.edu/site/SSurvey" method="post" class="luminate-signup-form luminate-signup-form-footer" id="luminate-signup-form-footer"> <div class="flex"> <div class="cons-email-wrapper"> <input name="cons_email" title="Enter email address" placeholder="Enter 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} .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-name field--type-string field--label-hidden"> <div class="field__item">National Air and Space Museum</div> </div> </div> </h4> </div> </ul> </div> <div class="nasm-styled-text outline-heading"> <li style="list-style:none;padding-left:0;margin-top:0px;margin-bottom:0px;"><a style="color:#fff!important;font-weight:400; border:none;text-decoration-line: none;" href="https://maps.google.com/?cid=17935525282803673115"> <style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-address-line-1 field--type-string field--label-hidden"> <div class="field__item">6th St. and Independence Ave SW</div> </div> </a></li> <li style="list-style:none;padding-left:0;margin-top:0px;margin-bottom:0px;"><a style="color:#fff!important;font-weight:400; border:none;text-decoration-line: none;" href="https://maps.google.com/?cid=17935525282803673115"> <style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-address-line-2 field--type-string field--label-hidden"> <div class="field__item">Washington, DC 20560</div> </div> </a></li> <li style="list-style:none;padding-left:0;"><style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-telephone field--type-string field--label-hidden"> <div class="field__item">202-633-2214</div> </div> </li> </div> </div> <div class="outline-column outline-column--col-span-default-12 outline-column--col-span-md-5 outline-column--row-span-1 outline-column--content-align-top"> <li style="list-style:none;"><style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-status field--type-string field--label-hidden"> <div class="field__item">Open daily</div> </div> </li> <li style="list-style:none;"><style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-open-hours field--type-string field--label-hidden"> <div class="field__item">10:00 am - 5:30 pm</div> </div> </li> <li style="list-style:none;"><a style="color:#fff!important;font-weight:400; border:none;" href="https://www.etix.com/ticket/e/1029945/timed-entry-washington-the-smithsonian-national-air-and-space-museum-general-public"> Free Timed-Entry Passes </br> Required </a></li> </div> </div> </div> <div style= "padding-top:1.25rem;padding-bottom:1.25rem" > <div id="block-museumva-2" class="outline-grid outline-grid--gap-size-small"> <div class="outline-column outline-column--col-span-default-12 outline-column--col-span-md-7 outline-column--row-span-1 outline-column--content-align-middle"> <div class="outline-list"> <ul role="list" class="list column" > <div class="outline-heading mb-2"> <h4 class="outline-text outline-text--lg outline-font--semibold font-family--display"> <div style="color:var(--brand-air)"> <style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-name field--type-string field--label-hidden"> <div class="field__item">Steven F. Udvar-Hazy Center</div> </div> </div> </h4> </div> </ul> </div> <div class="nasm-styled-text outline-heading"> <li style="list-style:none;padding-left:0;margin-top:0px;margin-bottom:0px;"><a style="color:#fff!important;font-weight:400; border:none;text-decoration-line: none;" href="https://goo.gl/maps/9MCYQS8VggDhMST69"> <style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-address-line-1 field--type-string field--label-hidden"> <div class="field__item">14390 Air and Space Museum Parkway</div> </div> </a></li> <li style="list-style:none;padding-left:0;margin-top:0px;margin-bottom:0px;"><a style="color:#fff!important;font-weight:400; border:none;text-decoration-line: none;" href="https://goo.gl/maps/9MCYQS8VggDhMST69"> <style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-address-line-2 field--type-string field--label-hidden"> <div class="field__item">Chantilly, VA 20151</div> </div> </a></li> <li style="list-style:none;padding-left:0;"><style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-telephone field--type-string field--label-hidden"> <div class="field__item">703-572-4118</div> </div> </li> </div> </div> <div class="outline-column outline-column--col-span-default-12 outline-column--col-span-md-5 outline-column--row-span-1 outline-column--content-align-top"> <li style="list-style:none;"><style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-status field--type-string field--label-hidden"> <div class="field__item">Open daily</div> </div> </li> <li style="list-style:none;"><style> .field{ margin-bottom: 0px; } .field--name-field-museum-telephone { color: #fff!important; font-weight: 400; } </style> <div class="field field--name-field-museum-open-hours field--type-string field--label-hidden"> <div class="field__item">10:00 am - 5:30 pm</div> </div> </li> </div> </div> </div> </div> </div> </div> </div> <div class="nasm-footer-contact-si-logo-container"> <div class="nasm-footer-contact-si-logo-wrapper"> <a href="https://www.si.edu/" target="_blank" aria-label="go to the smithsonian website"> <span class="nasm-logo"> <svg viewBox="0 0 148 57" fill="none" xmlns="//www.w3.org/2000/svg"> <g clip-path="url(#a)" fill="currentColor"> <path d="M50.284 38.743v-.656c1.416-.148 1.68-.254 1.68-2.033v-4.236c0-1.78-.598-2.913-2.115-2.913a4.37 4.37 0 0 0-2.682 1.303c.05.35.074.705.071 1.059v4.903c0 1.578.212 1.737 1.538 1.885v.657h-5.14v-.657c1.487-.148 1.7-.275 1.7-1.938v-4.289c0-1.864-.617-2.89-2.085-2.89a4.403 4.403 0 0 0-2.62 1.302v5.909c0 1.63.192 1.79 1.366 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