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The Moon

node · earth · Moon

Earth's only natural satellite and the only body beyond Earth that humans have visited. Mean radius 1,737.4 km, mean distance from Earth about 384,400 km, surface gravity 1.62 m/s². It rotates synchronously, so one hemisphere permanently faces Earth. It has effectively no atmosphere: surface temperatures swing from roughly 120 °C in sunlight to below −170 °C at night, and its spin axis is tilted only about 1.5° to the ecliptic, so polar crater floors that have not seen sunlight for billions of years sit below about 100 K. Those cold traps are why the Moon, long assumed bone dry, is now understood to hold accessible water ice.

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Evidence · 1
Timeline

No dated observations are stored for this object. Atlas shows what was observed and when — it does not infer a history.

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    Assembled narrative · 1

    Assembled from 12 blocks · 1 evidence · 5 related

    1. Story
    2. Earth's only natural satellite and the only body beyond Earth that humans have visited. Mean radius 1,737.4 km, mean distance from Earth about 384,400 km, surface gravity 1.62 m/s². It rotates synchronously, so one hemisphere permanently faces Earth. It has effectively no atmosphere: surface temperatures swing from roughly 120 °C in sunlight to below −170 °C at night, and its spin axis is tilted only about 1.5° to the ecliptic, so polar crater floors that have not seen sunlight for billions of years sit below about 100 K. Those cold traps are why the Moon, long assumed bone dry, is now understood to hold accessible water ice.
    3. Knowledge
    4. The Moon
    5. Connections
    6. Tranquility Base (Apollo 11 landing site)
    7. Apollo 8 enters lunar orbit and photographs Earthrise
    8. Challenger lands in the Taurus–Littrow valley
    9. Eugene Cernan becomes the last person to stand on the Moon
    10. Artemis II rounds the lunar far side and breaks the Apollo 13 distance record
    11. Evidence
    12. Source for lunar mean radius (1,737.4 km), mean Earth–Moon distance (384,400 km), surface gravity (1.62 m/s²), synchronous rotation and axial tilt.
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    Observed changes · 0

    No public Signals are attached to this object. Signals show what changed and when it was observed — never a direction or a rank.

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    Read the assembled narrativeContinue in StudioOpen TwinTwin does not start a decision from this kind of object.ShareSaveSaved objects are part of the authenticated projection, which is declared and not yet built.

    /atlas?object=BODY_MOON&experience=BODY_MOON