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class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Apsidal precession</span> </div> </a> <ul id="toc-Apsidal_precession-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Nodal_precession" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Nodal_precession"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Nodal precession</span> </div> </a> <ul id="toc-Nodal_precession-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " 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href="https://hy.wikipedia.org/wiki/%D4%BC%D5%B8%D6%82%D5%BD%D5%B6%D5%A1%D5%B5%D5%AB%D5%B6_%D5%BA%D6%80%D5%A5%D6%81%D5%A5%D5%BD%D5%AB%D5%A1" title="Լուսնային պրեցեսիա – Armenian" lang="hy" hreflang="hy" data-title="Լուսնային պրեցեսիա" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%9A%E0%A4%BE%E0%A4%A8%E0%A5%8D%E0%A4%A6%E0%A5%8D%E0%A4%B0_%E0%A4%85%E0%A4%AF%E0%A4%A8" title="चान्द्र अयन – Hindi" lang="hi" hreflang="hi" data-title="चान्द्र अयन" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9B%D1%83%D0%BD%D0%BD%D0%B0%D1%8F_%D0%BF%D1%80%D0%B5%D1%86%D0%B5%D1%81%D1%81%D0%B8%D1%8F" title="Лунная прецессия – Russian" lang="ru" hreflang="ru" data-title="Лунная прецессия" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9C%D1%96%D1%81%D1%8F%D1%86%D0%B5%D0%B2%D0%B0_%D0%BF%D1%80%D0%B5%D1%86%D0%B5%D1%81%D1%96%D1%8F" title="Місяцева прецесія – Ukrainian" lang="uk" hreflang="uk" data-title="Місяцева прецесія" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Ti%E1%BA%BFn_%C4%91%E1%BB%99ng_c%E1%BB%A7a_M%E1%BA%B7t_Tr%C4%83ng" title="Tiến động của Mặt Trăng – Vietnamese" lang="vi" hreflang="vi" data-title="Tiến động của Mặt Trăng" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng 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<div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Changes in the moon's rotation and orbit</div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Lunar_standstill.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/50/Lunar_standstill.svg/220px-Lunar_standstill.svg.png" decoding="async" width="220" height="285" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/50/Lunar_standstill.svg/330px-Lunar_standstill.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/50/Lunar_standstill.svg/440px-Lunar_standstill.svg.png 2x" data-file-width="363" data-file-height="471" /></a><figcaption><a href="/wiki/Lunar_standstill" title="Lunar standstill">Lunar standstill</a>: every 18.6 years, the <a href="/wiki/Declination" title="Declination">declination</a> range of the <a href="/wiki/Moon" title="Moon">Moon</a> reaches a maximum or minimum.</figcaption></figure> <p><b>Lunar precession</b> is a term used for three different <a href="/wiki/Precession" title="Precession">precession</a> motions related to the <a href="/wiki/Moon" title="Moon">Moon</a>. First, it can refer to change in orientation of the lunar rotational axis with respect to a <a href="/wiki/Plane_of_reference" class="mw-redirect" title="Plane of reference">reference plane</a>, following the normal rules of <a href="/wiki/Precession" title="Precession">precession</a> followed by spinning objects. In addition, the <a href="/wiki/Orbit_of_the_Moon" title="Orbit of the Moon">orbit of the Moon</a> undergoes two important types of precessional motion: apsidal and nodal. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Axial_precession">Axial precession</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lunar_precession&action=edit&section=1" title="Edit section: Axial precession"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Axial_precession" title="Axial precession">Axial precession</a></div> <p>The rotational axis of the Moon also undergoes precession. Since the Moon's axial tilt is only 1.5° with respect to the <a href="/wiki/Ecliptic" title="Ecliptic">ecliptic</a> (the plane of <a href="/wiki/Earth%27s_orbit" title="Earth's orbit">Earth's orbit</a> around the Sun), this effect is small. Once every 18.6 years,<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> the lunar north pole describes a small circle around a point in the constellation <a href="/wiki/Draco_(constellation)" title="Draco (constellation)">Draco</a>, while correspondingly, the lunar south pole describes a small circle around a point in the constellation <a href="/wiki/Dorado" title="Dorado">Dorado</a>. Similar to Earth, the Moon's axial precession is westwards <sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> - whereas Apsidal precession is in the same direction as the rotation (meaning apsidal precession is eastward). </p> <div class="mw-heading mw-heading2"><h2 id="Apsidal_precession">Apsidal precession <span class="anchor" id="Apsidal"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lunar_precession&action=edit&section=2" title="Edit section: Apsidal precession"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Apsidal_precession" title="Apsidal precession">Apsidal precession</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Moon_apsidal_precession.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/53/Moon_apsidal_precession.png/220px-Moon_apsidal_precession.png" decoding="async" width="220" height="191" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/53/Moon_apsidal_precession.png/330px-Moon_apsidal_precession.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/53/Moon_apsidal_precession.png/440px-Moon_apsidal_precession.png 2x" data-file-width="1446" data-file-height="1257" /></a><figcaption><a href="/wiki/Apsidal_precession" title="Apsidal precession">Apsidal precession</a> occurs when the direction of the <a href="/wiki/Major_axis" class="mw-redirect" title="Major axis">major axis</a> of the Moon's <a href="/wiki/Elliptic_orbit" title="Elliptic orbit">elliptic orbit</a> rotates once every 8.85 years in the same direction as the Moon's rotation itself. This image looks upwards depicting Earth's geographic south pole and the elliptical shape of the Moon's orbit (which is vastly exaggerated from its almost circular shape to make the precession evident) is rotating from white to greyer orbits.</figcaption></figure> <style data-mw-deduplicate="TemplateStyles:r1273380762/mw-parser-output/.tmulti">.mw-parser-output .tmulti .multiimageinner{display:flex;flex-direction:column}.mw-parser-output .tmulti .trow{display:flex;flex-direction:row;clear:left;flex-wrap:wrap;width:100%;box-sizing:border-box}.mw-parser-output .tmulti .tsingle{margin:1px;float:left}.mw-parser-output .tmulti .theader{clear:both;font-weight:bold;text-align:center;align-self:center;background-color:transparent;width:100%}.mw-parser-output .tmulti .thumbcaption{background-color:transparent}.mw-parser-output .tmulti .text-align-left{text-align:left}.mw-parser-output .tmulti .text-align-right{text-align:right}.mw-parser-output .tmulti .text-align-center{text-align:center}@media all and (max-width:720px){.mw-parser-output .tmulti .thumbinner{width:100%!important;box-sizing:border-box;max-width:none!important;align-items:center}.mw-parser-output .tmulti .trow{justify-content:center}.mw-parser-output .tmulti .tsingle{float:none!important;max-width:100%!important;box-sizing:border-box;text-align:center}.mw-parser-output .tmulti .tsingle .thumbcaption{text-align:left}.mw-parser-output .tmulti .trow>.thumbcaption{text-align:center}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .tmulti .multiimageinner span:not(.skin-invert-image):not(.skin-invert):not(.bg-transparent) img{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .tmulti .multiimageinner span:not(.skin-invert-image):not(.skin-invert):not(.bg-transparent) img{background-color:white}}</style><div class="thumb tmulti tright"><div class="thumbinner multiimageinner" style="width:222px;max-width:222px"><div class="trow"><div class="tsingle" style="width:220px;max-width:220px"><div class="thumbimage" style="height:163px;overflow:hidden"><span typeof="mw:File"><a href="/wiki/File:Animation_of_Moon_orbit_around_Earth_-_Polar_view.gif" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Animation_of_Moon_orbit_around_Earth_-_Polar_view.gif/218px-Animation_of_Moon_orbit_around_Earth_-_Polar_view.gif" decoding="async" width="218" height="164" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Animation_of_Moon_orbit_around_Earth_-_Polar_view.gif/327px-Animation_of_Moon_orbit_around_Earth_-_Polar_view.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d1/Animation_of_Moon_orbit_around_Earth_-_Polar_view.gif/436px-Animation_of_Moon_orbit_around_Earth_-_Polar_view.gif 2x" data-file-width="560" data-file-height="420" /></a></span></div></div></div><div class="trow"><div class="tsingle" style="width:220px;max-width:220px"><div class="thumbimage" style="height:163px;overflow:hidden"><span typeof="mw:File"><a href="/wiki/File:Animation_of_Moon_orbit_around_Earth_-_Equatorial_view.gif" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/96/Animation_of_Moon_orbit_around_Earth_-_Equatorial_view.gif/218px-Animation_of_Moon_orbit_around_Earth_-_Equatorial_view.gif" decoding="async" width="218" height="164" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/96/Animation_of_Moon_orbit_around_Earth_-_Equatorial_view.gif/327px-Animation_of_Moon_orbit_around_Earth_-_Equatorial_view.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/96/Animation_of_Moon_orbit_around_Earth_-_Equatorial_view.gif/436px-Animation_of_Moon_orbit_around_Earth_-_Equatorial_view.gif 2x" data-file-width="560" data-file-height="420" /></a></span></div></div></div><div class="trow" style="display:flex"><div class="thumbcaption">Animation of Moon orbit around Earth<br /><style data-mw-deduplicate="TemplateStyles:r981673959">.mw-parser-output .legend{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .legend-color{display:inline-block;min-width:1.25em;height:1.25em;line-height:1.25;margin:1px 0;text-align:center;border:1px solid black;background-color:transparent;color:black}.mw-parser-output .legend-text{}</style><span class="legend nowrap"><span class="legend-color mw-no-invert" style="background-color:magenta; color:black;"> </span> <a href="/wiki/Moon" title="Moon">Moon</a></span> <b>·</b> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><span class="legend nowrap"><span class="legend-color mw-no-invert" style="background-color:RoyalBlue; color:white;"> </span> <a href="/wiki/Earth" title="Earth">Earth</a></span><br />Top: Polar view; Bottom: Equatorial view</div></div></div></div> <p>This kind of precession is that of the major axis of the Moon's <a href="/wiki/Elliptic_orbit" title="Elliptic orbit">elliptic orbit</a> (the line of the <a href="/wiki/Apsides" class="mw-redirect" title="Apsides">apsides</a> from <a href="/wiki/Perigee" class="mw-redirect" title="Perigee">perigee</a> to <a href="/wiki/Apogee" class="mw-redirect" title="Apogee">apogee</a>), which <a href="/wiki/Precession" title="Precession">precesses</a> eastward by 360° in approximately 8.85 years. This is the reason that an <a href="/wiki/Anomalistic_month" class="mw-redirect" title="Anomalistic month">anomalistic month</a> (the period the Moon moves from the perigee to the apogee and to the perigee again) is longer than the <a href="/wiki/Lunar_month#Sidereal_month" title="Lunar month">sidereal month</a> (the period the Moon takes to complete one orbit with respect to the fixed stars). This <a href="/wiki/Apsidal_precession" title="Apsidal precession">apsidal precession</a> completes one rotation in the same time as the number of sidereal months exceeds the number of anomalistic months by exactly one, after about 3,233 days (8.85 years). </p> <div class="mw-heading mw-heading2"><h2 id="Nodal_precession">Nodal precession<span class="anchor" id="Nodal"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lunar_precession&action=edit&section=3" title="Edit section: Nodal precession"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Eclipse_vs_new_or_full_moons,_annotated.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Eclipse_vs_new_or_full_moons%2C_annotated.svg/220px-Eclipse_vs_new_or_full_moons%2C_annotated.svg.png" decoding="async" width="220" height="111" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Eclipse_vs_new_or_full_moons%2C_annotated.svg/330px-Eclipse_vs_new_or_full_moons%2C_annotated.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Eclipse_vs_new_or_full_moons%2C_annotated.svg/440px-Eclipse_vs_new_or_full_moons%2C_annotated.svg.png 2x" data-file-width="1536" data-file-height="772" /></a><figcaption>Approximate <a href="/wiki/Axial_parallelism" title="Axial parallelism">axial parallelism</a> of the Moon's orbit results in relative revolution of the <a href="/wiki/Lunar_nodes" class="mw-redirect" title="Lunar nodes">lunar nodes</a> as the Earth revolves around the Sun. This causes an <a href="/wiki/Eclipse_season" title="Eclipse season">eclipse season</a> approximately every six months. Nodal precession occurs every 18.6 years.</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Lunar_eclipse_diagram-en.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/34/Lunar_eclipse_diagram-en.svg/220px-Lunar_eclipse_diagram-en.svg.png" decoding="async" width="220" height="128" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/34/Lunar_eclipse_diagram-en.svg/330px-Lunar_eclipse_diagram-en.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/34/Lunar_eclipse_diagram-en.svg/440px-Lunar_eclipse_diagram-en.svg.png 2x" data-file-width="815" data-file-height="476" /></a><figcaption>The <a href="/wiki/Lunar_nodes" class="mw-redirect" title="Lunar nodes">lunar nodes</a> are the points where the <a href="/wiki/Moon%27s_orbit" class="mw-redirect" title="Moon's orbit">Moon's orbit</a> intersects the <a href="/wiki/Ecliptic" title="Ecliptic">ecliptic</a>.</figcaption></figure> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Nodal_precession" title="Nodal precession">Nodal precession</a></div> <p>Another type of lunar orbit precession is that of the plane of the <a href="/wiki/Orbit_of_the_Moon" title="Orbit of the Moon">Moon's orbit</a>. The period of the lunar <a href="/wiki/Nodal_precession" title="Nodal precession">nodal precession</a> is defined as the time it takes the ascending <a href="/wiki/Orbital_node" title="Orbital node">node</a> to move through 360° relative to the <a href="/wiki/March_equinox" title="March equinox">vernal equinox (autumnal equinox in the Southern Hemisphere)</a>. It is about 18.6 years and the direction of motion is westward, i.e., in the direction opposite to the Earth's orbit around the Sun. This is the reason that a <a href="/wiki/Draconic_month" class="mw-redirect" title="Draconic month">draconic month</a> or <a href="/wiki/Nodal_period" title="Nodal period">nodal period</a> (the period the Moon takes to return to the same node in its orbit) is shorter than the sidereal month. After one nodal precession period, the number of draconic months exceeds the number of sidereal months by exactly one. This period is about 6,793 days (18.60 years).<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>As a result of this nodal precession, the time for the Sun to return to the same lunar node, the <a href="/wiki/Eclipse_cycle" title="Eclipse cycle">eclipse year</a>, is about 18.6377 days shorter than a <a href="/wiki/Sidereal_year" title="Sidereal year">sidereal year</a>. The number of solar orbits (years) during one lunar nodal precession period equals the period of orbit (one year<sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources"><span title="Sidereal? Synodic? Seems tropical was used but no source given. (October 2022)">specify</span></a></i>]</sup>) divided by this difference, minus one: <style data-mw-deduplicate="TemplateStyles:r1214402035">.mw-parser-output .sfrac{white-space:nowrap}.mw-parser-output .sfrac.tion,.mw-parser-output .sfrac .tion{display:inline-block;vertical-align:-0.5em;font-size:85%;text-align:center}.mw-parser-output .sfrac .num{display:block;line-height:1em;margin:0.0em 0.1em;border-bottom:1px solid}.mw-parser-output .sfrac .den{display:block;line-height:1em;margin:0.1em 0.1em}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}</style><span class="sfrac">⁠<span class="tion"><span class="num">365.2422</span><span class="sr-only">/</span><span class="den">18.6377</span></span>⁠</span> − 1.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (October 2022)">citation needed</span></a></i>]</sup> </p><p>The precession cycle affects the heights of tides. During half the cycle, the high and low tides are less extreme; in the other half of the cycle, they are amplified, with high tides greater than average and low tides lower than average.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lunar_precession&action=edit&section=4" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Lunar_theory" title="Lunar theory">Lunar theory</a></li> <li><a href="/wiki/Orbit_of_the_Moon" title="Orbit of the Moon">Orbit of the Moon</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lunar_precession&action=edit&section=5" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFPatrick_Moore1983" class="citation book cs1"><a href="/wiki/Patrick_Moore" title="Patrick Moore">Patrick Moore</a> (1983). <i>The Guinness Book of Astronomy Facts & Feats</i>. p. 29. <q>In 1968 the north pole star of the Moon was Omega Draconis; by 1977 it was 36 Draconis. The south pole star is Delta Doradus.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Guinness+Book+of+Astronomy+Facts+%26+Feats&rft.pages=29&rft.date=1983&rft.au=Patrick+Moore&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALunar+precession" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.madsci.org/posts/archives/2001-09/1001187215.As.r.html">"Re: Can precession occur in the opposite direction?"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2021-10-20</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Re%3A+Can+precession+occur+in+the+opposite+direction%3F&rft_id=http%3A%2F%2Fwww.madsci.org%2Fposts%2Farchives%2F2001-09%2F1001187215.As.r.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALunar+precession" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://epod.usra.edu/blog/2024/04/equinoxal-crossover-of-the-spring-full-moon.html">"Equinoxal crossover of the spring full moon"</a>. <i>Universities Space Research Association</i>. 2024-04-22<span class="reference-accessdate">. Retrieved <span class="nowrap">2024-10-29</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Universities+Space+Research+Association&rft.atitle=Equinoxal+crossover+of+the+spring+full+moon&rft.date=2024-04-22&rft_id=https%3A%2F%2Fepod.usra.edu%2Fblog%2F2024%2F04%2Fequinoxal-crossover-of-the-spring-full-moon.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALunar+precession" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGreicius2021" class="citation web cs1">Greicius, Tony (7 July 2021). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220603031628/https://www.nasa.gov/feature/jpl/study-projects-a-surge-in-coastal-flooding-starting-in-2030s/">"Study Projects a Surge in Coastal Flooding, Starting in 2030s"</a>. <i>NASA</i>. Archived from <a rel="nofollow" class="external text" href="https://www.nasa.gov/feature/jpl/study-projects-a-surge-in-coastal-flooding-starting-in-2030s">the original</a> on 2022-06-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2021-07-15</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=NASA&rft.atitle=Study+Projects+a+Surge+in+Coastal+Flooding%2C+Starting+in+2030s&rft.date=2021-07-07&rft.aulast=Greicius&rft.aufirst=Tony&rft_id=http%3A%2F%2Fwww.nasa.gov%2Ffeature%2Fjpl%2Fstudy-projects-a-surge-in-coastal-flooding-starting-in-2030s&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALunar+precession" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPengHillMeltznerSwitzer2019" class="citation journal cs1">Peng, Dongju; Hill, Emma M.; Meltzner, Aron J.; Switzer, Adam D. (2019-01-10). <a rel="nofollow" class="external text" href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018JC014695">"Tide Gauge Records Show That the 18.61-Year Nodal Tidal Cycle Can Change High Water Levels by up to 30 cm"</a>. <i>Journal of Geophysical Research: Oceans</i>. <b>124</b> (1): <span class="nowrap">736–</span>749. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1029%2F2018JC014695">10.1029/2018JC014695</a>. <a href="/wiki/Hdl_(identifier)" class="mw-redirect" title="Hdl (identifier)">hdl</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://hdl.handle.net/10220%2F49096">10220/49096</a></span>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/2169-9275">2169-9275</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+Geophysical+Research%3A+Oceans&rft.atitle=Tide+Gauge+Records+Show+That+the+18.61-Year+Nodal+Tidal+Cycle+Can+Change+High+Water+Levels+by+up+to+30+cm&rft.volume=124&rft.issue=1&rft.pages=%3Cspan+class%3D%22nowrap%22%3E736-%3C%2Fspan%3E749&rft.date=2019-01-10&rft_id=info%3Ahdl%2F10220%2F49096&rft.issn=2169-9275&rft_id=info%3Adoi%2F10.1029%2F2018JC014695&rft.aulast=Peng&rft.aufirst=Dongju&rft.au=Hill%2C+Emma+M.&rft.au=Meltzner%2C+Aron+J.&rft.au=Switzer%2C+Adam+D.&rft_id=https%3A%2F%2Fagupubs.onlinelibrary.wiley.com%2Fdoi%2F10.1029%2F2018JC014695&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALunar+precession" class="Z3988"></span></span> </li> </ol></div></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSeidelmann,_P.K.1992" class="citation book cs1">Seidelmann, P.K., ed. (1992). <i>Explanatory Supplement to the <a href="/wiki/Astronomical_Almanac" title="Astronomical Almanac">Astronomical Almanac</a></i>. <a href="/wiki/United_States_Naval_Observatory" title="United States Naval Observatory">U.S. Naval Observatory</a> / University Science Books. pp. <span class="nowrap">114–</span>115, 701.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Explanatory+Supplement+to+the+Astronomical+Almanac&rft.pages=%3Cspan+class%3D%22nowrap%22%3E114-%3C%2Fspan%3E115%2C+701&rft.pub=U.S.+Naval+Observatory+%2F+University+Science+Books&rft.date=1992&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALunar+precession" class="Z3988"></span></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist 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href="/wiki/Template:The_Moon" title="Template:The Moon"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:The_Moon" title="Template talk:The Moon"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:The_Moon" title="Special:EditPage/Template:The Moon"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Moon412" style="font-size:114%;margin:0 4em"><a href="/wiki/Moon" title="Moon">Moon</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="3"><div><a href="/wiki/Outline_of_the_Moon" title="Outline of the Moon">Outline</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Physical<br />properties</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap"><a href="/wiki/Internal_structure_of_the_Moon" title="Internal structure of the Moon">Internal structure</a></span></li> <li><span class="nowrap"><a href="/wiki/Selenography" title="Selenography">Topography</a></span></li> <li><span class="nowrap"><a href="/wiki/Atmosphere_of_the_Moon" title="Atmosphere of the Moon">Atmosphere</a></span></li> <li><span class="nowrap"><a href="/wiki/Gravitation_of_the_Moon" title="Gravitation of the Moon">Gravity field</a></span> <ul><li><span class="nowrap"><a href="/wiki/Hill_sphere" title="Hill sphere">Hill sphere</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Magnetic_field_of_the_Moon" title="Magnetic field of the Moon">Magnetic field</a></span></li> <li><span class="nowrap"><a href="/wiki/Sodium_tail_of_the_Moon" title="Sodium tail of the Moon">Sodium tail</a></span></li> <li><span class="nowrap"><a href="/wiki/Moonlight" title="Moonlight">Moonlight</a></span> <ul><li><span class="nowrap"><a href="/wiki/Earthlight_(astronomy)" title="Earthlight (astronomy)">Earthshine</a></span></li></ul></li></ul> </div></td><td class="noviewer navbox-image" rowspan="9" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:FullMoon2010.jpg" class="mw-file-description" title="A full moon"><img alt="A full moon" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e1/FullMoon2010.jpg/90px-FullMoon2010.jpg" decoding="async" width="90" height="86" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e1/FullMoon2010.jpg/135px-FullMoon2010.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e1/FullMoon2010.jpg/180px-FullMoon2010.jpg 2x" data-file-width="2580" data-file-height="2452" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Orbit_of_the_Moon" title="Orbit of the Moon">Orbit</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap"><a href="/wiki/Lunar_distance_(astronomy)" class="mw-redirect" title="Lunar distance (astronomy)">Lunar distance</a></span></li> <li><span class="nowrap"><a href="/wiki/Orbital_elements" title="Orbital elements">Orbital elements</a></span> <ul><li><span class="nowrap"><a href="/wiki/Lunar_distance_(astronomy)" class="mw-redirect" title="Lunar distance (astronomy)">Distance</a></span> <ul><li><span class="nowrap"><a href="/wiki/Apsis" title="Apsis">Perigee and apogee</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Libration" title="Libration">Libration</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_node" title="Lunar node">Nodes</a></span> <ul><li><span class="nowrap"><a href="/wiki/Nodal_period" title="Nodal period">Nodal period</a></span></li></ul></li> <li><span class="nowrap"><a class="mw-selflink selflink">Precession</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Syzygy_(astronomy)" title="Syzygy (astronomy)">Syzygy</a></span> <ul><li><span class="nowrap"><a href="/wiki/New_moon" title="New moon">New moon</a></span></li> <li><span class="nowrap"><a href="/wiki/Full_moon" title="Full moon">Full moon</a></span></li> <li><span class="nowrap"><a href="/wiki/Eclipse" title="Eclipse">Eclipses</a></span> <ul><li><span class="nowrap"><a href="/wiki/Lunar_eclipse" title="Lunar eclipse">Lunar eclipse</a></span> <ul><li><span class="nowrap"><a href="/wiki/Total_penumbral_lunar_eclipse" title="Total penumbral lunar eclipse">Total penumbral lunar eclipse</a></span></li> <li><span class="nowrap"><a href="/wiki/Tetrad_(astronomy)" title="Tetrad (astronomy)">Tetrad</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Solar_eclipse" title="Solar eclipse">Solar eclipse</a></span></li> <li><span class="nowrap"><a href="/wiki/Solar_eclipses_on_the_Moon" title="Solar eclipses on the Moon">Solar eclipses on the Moon</a></span></li> <li><span class="nowrap"><a href="/wiki/Eclipse_cycle" title="Eclipse cycle">Eclipse cycle</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Supermoon" title="Supermoon">Supermoon</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Tide" title="Tide">Tide</a></span> <ul><li><span class="nowrap"><a href="/wiki/Tidal_force" title="Tidal force">Tidal force</a></span></li> <li><span class="nowrap"><a href="/wiki/Tidal_locking" title="Tidal locking">Tidal locking</a></span></li> <li><span class="nowrap"><a href="/wiki/Tidal_acceleration" title="Tidal acceleration">Tidal acceleration</a></span></li> <li><span class="nowrap"><a href="/wiki/Tidal_range" title="Tidal range">Tidal range</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Lunar_station" title="Lunar station">Lunar station</a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Surface and<br /><a href="/wiki/List_of_lunar_features" title="List of lunar features">features</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap"><a href="/wiki/Selenography" title="Selenography">Selenography</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_terminator" class="mw-redirect" title="Lunar terminator">Terminator</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_limb" title="Lunar limb">Limb</a></span></li> <li><span class="nowrap">Hemispheres</span> <ul><li><span class="nowrap"><a href="/wiki/Near_side_of_the_Moon" title="Near side of the Moon">Near side</a></span></li> <li><span class="nowrap"><a href="/wiki/Far_side_of_the_Moon" title="Far side of the Moon">Far side</a></span></li></ul></li> <li><span class="nowrap">Poles</span> <ul><li><span class="nowrap"><a href="/wiki/Lunar_north_pole" title="Lunar north pole">North pole</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_south_pole" title="Lunar south pole">South pole</a></span> <ul><li><span class="nowrap"><a href="/wiki/Face_on_Moon_South_Pole" title="Face on Moon South Pole">Face</a></span></li></ul></li></ul></li> <li><span class="nowrap"><a href="/wiki/Lunar_mare" title="Lunar mare">Maria</a></span> <ul><li><span class="nowrap"><a href="/wiki/List_of_maria_on_the_Moon" title="List of maria on the Moon">List</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/List_of_mountains_on_the_Moon" title="List of mountains on the Moon">Mountains</a></span> <ul><li><span class="nowrap"><a href="/wiki/Peak_of_eternal_light" title="Peak of eternal light">Peak of eternal light</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/List_of_valleys_on_the_Moon" title="List of valleys on the Moon">Valleys</a></span></li> <li><span class="nowrap"><a href="/wiki/Volcanism_on_the_Moon#Features" title="Volcanism on the Moon">Volcanic features</a></span> <ul><li><span class="nowrap"><a href="/wiki/Lunar_dome" title="Lunar dome">Domes</a></span></li> <li><span class="nowrap"><a href="/wiki/Caldera#The_Moon" title="Caldera">Calderas</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_lava_tube" title="Lunar lava tube">Lava tubes</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Lunar_craters" title="Lunar craters">Craters</a></span> <ul><li><span class="nowrap"><a href="/wiki/List_of_craters_on_the_Moon" title="List of craters on the Moon">List</a></span></li> <li><span class="nowrap"><a href="/wiki/Ray_system#Lunar_rays" title="Ray system">Ray systems</a></span></li> <li><span class="nowrap"><a href="/wiki/Permanently_shadowed_crater" title="Permanently shadowed crater">Permanently shadowed craters</a></span></li> <li><span class="nowrap"><a href="/wiki/South_Pole%E2%80%93Aitken_basin" title="South Pole–Aitken basin">South Pole–Aitken basin</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Lunar_soil" class="mw-redirect" title="Lunar soil">Soil</a></span> <ul><li><span class="nowrap"><a href="/wiki/Lunar_swirls" title="Lunar swirls">swirls</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Rille" title="Rille">Rilles</a></span></li> <li><span class="nowrap"><a href="/wiki/Wrinkle_ridge" title="Wrinkle ridge">Wrinkle ridges</a></span></li> <li><span class="nowrap"><a href="/wiki/Moon_rock" title="Moon rock">Rocks</a></span> <ul><li><span class="nowrap"><a href="/wiki/Lunar_basalt_70017" title="Lunar basalt 70017">Lunar basalt 70017</a></span></li> <li><span class="nowrap"><a href="/wiki/Changesite-(Y)" title="Changesite-(Y)">Changesite-(Y)</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Lunar_water" title="Lunar water">Water</a></span></li> <li><span class="nowrap"><a href="/wiki/Space_weathering" title="Space weathering">Space weathering</a></span> <ul><li><span class="nowrap"><a href="/wiki/Micrometeorite" title="Micrometeorite">Micrometeorite</a></span></li> <li><span class="nowrap"><a href="/wiki/Sputtering" title="Sputtering">Sputtering</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Quake_(natural_phenomenon)#Moonquake" title="Quake (natural phenomenon)">Quakes</a></span></li> <li><span class="nowrap"><a href="/wiki/Transient_lunar_phenomenon" title="Transient lunar phenomenon">Transient lunar phenomenon</a></span></li> <li><span class="nowrap"><a href="/wiki/Selenographic_coordinate_system" title="Selenographic coordinate system">Selenographic coordinate system</a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Science</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap"><a href="/wiki/Lunar_observation" title="Lunar observation">Observation</a></span></li> <li><span class="nowrap"><a href="/wiki/Libration#Lunar_libration" title="Libration">Libration</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_theory" title="Lunar theory">Lunar theory</a></span></li> <li><span class="nowrap"><a href="/wiki/Origin_of_the_Moon" title="Origin of the Moon">Origin</a></span> <ul><li><span class="nowrap"><a href="/wiki/Giant-impact_hypothesis" title="Giant-impact hypothesis">Giant-impact hypothesis</a></span> <ul><li><span class="nowrap"><a href="/wiki/Theia_(planet)" title="Theia (planet)">Theia</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_magma_ocean" title="Lunar magma ocean">Lunar magma ocean</a></span></li></ul></li></ul></li> <li><span class="nowrap"><a href="/wiki/Geology_of_the_Moon" title="Geology of the Moon">Geology</a></span> <ul><li><span class="nowrap"><a href="/wiki/Lunar_geologic_timescale" title="Lunar geologic timescale">Timescale</a></span> <ul><li><span class="nowrap"><a href="/wiki/Late_Heavy_Bombardment" title="Late Heavy Bombardment">Late Heavy Bombardment</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Lunar_meteorite" title="Lunar meteorite">Lunar meteorites</a></span></li> <li><span class="nowrap"><a href="/wiki/KREEP" title="KREEP">KREEP</a></span></li> <li><span class="nowrap"><a href="/wiki/Volcanism_on_the_Moon" title="Volcanism on the Moon">Volcanism</a></span></li></ul></li> <li><span class="nowrap">Experiments</span> <ul><li><span class="nowrap"><a href="/wiki/Lunar_Laser_Ranging_experiment" class="mw-redirect" title="Lunar Laser Ranging experiment">Lunar laser ranging</a></span></li> <li><span class="nowrap"><a href="/wiki/Apollo_Lunar_Surface_Experiments_Package" title="Apollo Lunar Surface Experiments Package">ALSEP</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Lunar_sample_displays" title="Lunar sample displays">Lunar sample displays</a></span> <ul><li><span class="nowrap"><a href="/wiki/Apollo_11_lunar_sample_display" title="Apollo 11 lunar sample display">Apollo 11</a></span></li> <li><span class="nowrap"><a href="/wiki/Apollo_17_lunar_sample_display" title="Apollo 17 lunar sample display">Apollo 17</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Lunar_seismology" title="Lunar seismology">Lunar seismology</a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Exploration_of_the_Moon" title="Exploration of the Moon">Exploration</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap"><a href="/wiki/List_of_missions_to_the_Moon" title="List of missions to the Moon">Missions</a></span> <ul><li><span class="nowrap"><a href="/wiki/Apollo_program" title="Apollo program">Apollo program</a></span></li> <li><span class="nowrap"><a href="/wiki/List_of_people_who_have_walked_on_the_Moon" class="mw-redirect" title="List of people who have walked on the Moon">Explorers</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/List_of_lunar_probes" title="List of lunar probes">Probes</a></span></li> <li><span class="nowrap"><a href="/wiki/Moon_landing" title="Moon landing">Landing</a></span></li> <li><span class="nowrap"><a href="/wiki/Colonization_of_the_Moon" title="Colonization of the Moon">Colonization</a></span> <ul><li><span class="nowrap"><a href="/wiki/Moonbase" title="Moonbase">Moonbase</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Tourism_on_the_Moon" title="Tourism on the Moon">Tourism</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_resources" title="Lunar resources">Lunar resources</a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Time-telling <br />and <a href="/wiki/Celestial_navigation" title="Celestial navigation">navigation</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap"><a href="/wiki/Lunar_calendar" title="Lunar calendar">Lunar calendar</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunisolar_calendar" title="Lunisolar calendar">Lunisolar calendar</a></span></li> <li><span class="nowrap"><a href="/wiki/Month" title="Month">Month</a></span> <ul><li><span class="nowrap"><a href="/wiki/Lunar_month" title="Lunar month">Lunar month</a></span> <ul><li><span class="nowrap"><a href="/wiki/Nodal_period" title="Nodal period">Nodal period</a></span></li></ul></li></ul></li> <li><span class="nowrap"><a href="/wiki/Fortnight" title="Fortnight">Fortnight</a></span></li> <li><span class="nowrap"><a href="/wiki/Week" title="Week">Sennight</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_station" title="Lunar station">Lunar station</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_distance_(navigation)" title="Lunar distance (navigation)">Lunar distance</a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lunar_phase" title="Lunar phase">Phases</a> and<br />names</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap"><a href="/wiki/New_moon" title="New moon">New</a></span></li> <li><span class="nowrap"><a href="/wiki/Full_moon" title="Full moon">Full</a></span> <ul><li><span class="nowrap"><a href="/wiki/Full_moon#Full_moon_names" title="Full moon">Names</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Crescent" title="Crescent">Crescent</a></span></li> <li><span class="nowrap"><a href="/wiki/Supermoon" title="Supermoon">Super and micro</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_eclipse" title="Lunar eclipse">Blood</a></span></li> <li><span class="nowrap"><a href="/wiki/Blue_moon" title="Blue moon">Blue</a></span></li> <li><span class="nowrap"><a href="/wiki/Black_moon" title="Black moon">Black</a></span></li> <li><span class="nowrap"><a href="/wiki/Dark_moon" title="Dark moon">Dark</a></span></li> <li><span class="nowrap"><a href="/wiki/Wet_moon" title="Wet moon">Wet</a></span></li> <li><span class="nowrap"><a href="/wiki/Tetrad_(astronomy)" title="Tetrad (astronomy)">Tetrad</a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Daily phenomena</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap"><a href="/wiki/Moonrise_and_moonset" title="Moonrise and moonset">Moonrise</a></span></li> <li><span class="nowrap"><a href="/wiki/Culmination" title="Culmination">Meridian passage</a></span></li> <li><span class="nowrap"><a href="/wiki/Moonrise_and_moonset" title="Moonrise and moonset">Moonset</a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span class="nowrap"><a href="/wiki/Lunar_deity" title="Lunar deity">Lunar deities</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_effect" title="Lunar effect">Lunar effect</a></span></li> <li><span class="nowrap"><a href="/wiki/Earth_phase" title="Earth phase">Earth phase</a></span></li> <li><span class="nowrap"><a href="/wiki/Moon_illusion" title="Moon illusion">Moon illusion</a></span></li> <li><span class="nowrap"><a href="/wiki/Lunar_pareidolia" title="Lunar pareidolia">Pareidolia</a></span> <ul><li><span class="nowrap"><a href="/wiki/Man_in_the_Moon" title="Man in the Moon">Man in the Moon</a></span></li> <li><span class="nowrap"><a href="/wiki/Moon_rabbit" title="Moon rabbit">Moon rabbit</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/List_of_people_with_craters_of_the_Moon_named_after_them" title="List of people with craters of the Moon named after them">Craters named after people</a></span></li> <li><span class="nowrap"><a href="/wiki/List_of_artificial_objects_on_the_Moon" title="List of artificial objects on the Moon">Artificial objects on the Moon</a></span></li> <li><span class="nowrap"><a href="/wiki/List_of_extraterrestrial_memorials#The_Moon" title="List of extraterrestrial memorials">Memorials on the Moon</a></span></li> <li><span class="nowrap"><a href="/wiki/Moon_in_science_fiction" title="Moon in science fiction">Moon in science fiction</a></span> <ul><li><span class="nowrap"><a href="/wiki/List_of_appearances_of_the_Moon_in_fiction" title="List of appearances of the Moon in fiction">list</a></span></li> <li><span class="nowrap"><a href="/wiki/List_of_fictional_astronauts_(Project_Apollo_era)" title="List of fictional astronauts (Project Apollo era)">Apollo era</a></span></li> <li><span class="nowrap"><a href="/wiki/List_of_fictional_astronauts_(futuristic_exploration_of_Moon)" title="List of fictional astronauts (futuristic exploration of Moon)">futuristic exploration</a></span></li> <li><span class="nowrap"><a href="/wiki/Hollow_Moon" title="Hollow Moon">Hollow Moon</a></span></li></ul></li> <li><span class="nowrap"><a href="/wiki/Moon_landing_conspiracy_theories" title="Moon landing conspiracy theories">Moon landing conspiracy theories</a></span></li> <li><span class="nowrap"><a href="/wiki/Moon_Treaty" title="Moon Treaty">Moon Treaty</a></span></li> <li><span class="nowrap">"<a href="/wiki/The_Moon_is_made_of_green_cheese" title="The Moon is made of green cheese">Moon is made of green cheese</a>"</span></li> <li><span class="nowrap"><a href="/wiki/Natural_satellite" title="Natural satellite">Natural satellite</a></span></li> <li><span class="nowrap"><a href="/wiki/Double_planet" title="Double planet">Double planet</a></span></li> <li><span class="nowrap"><a href="/wiki/Planetary_objects_proposed_in_religion,_astrology,_ufology_and_pseudoscience#Lilith" title="Planetary objects proposed in religion, astrology, ufology and pseudoscience">Lilith (hypothetical second moon)</a></span></li> <li><span class="nowrap"><a href="/wiki/Splitting_of_the_Moon" title="Splitting of the Moon">Splitting of the Moon</a></span></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><span class="nowrap"><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Moon" title="Category:Moon">Category</a></span></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img 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