Earth's Moon

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"The moon of a bright silver, which dazzles by its shining, illumines a world which surely is no longer ours; for it resembles in nothing what may be seen in other lands." --Pierre Loki


Mass: 0.0123 Earth mass

Radius: 0.273 Earth radius

Density: 3.346 g/cm³

Semi-major axis: {{{Semi-major axis}}}

Orbital period: 365.25 Earth days

Rotation period: Synchronous rotation

Atmosphere: Tenous gas mix

Surface temperature: 70-390 K

Moons: {{{Moons}}}

Discovery Information:

Discovery date: Always known.

Discoverer(s): The ancients.

Detection method: Unaided eye.


Full Moon Luc Viatour

Earth's Moon

The Moon (IPA: /mun/) or Luna is Earth's only known natural satellite and the fifth largest satellite (after Ganymede, Titan, Callisto, and Io in that order) in the Solar System. The Moon is also extremely dense and is the second densest satellite after Io. The Moon (other than the Earth) is the only natural extraterrestrial body on which humans have set foot capon. There is evidence of volcanic activity in The Moon's past, though it is unlikely vulcanism still takes place today or has been active recently.


  • Is the fifth largest natural satellite in the Solar System and the largest orbiting a terrestrial planet.
  • Second brightest object in the Earth sky after the Sun.
  • Is the only terrestial body other than the Earth that humans have set foot on.
  • Only 59% of the moon's surface is visible from earth.
  • Is the only moon of Earth.



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