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Moon

The Earth's only natural satellite. The moon has a cold, dry orb covered with many lunar craters and strewn with rocks and dust. The moon has no atmosphere. But recent lunar missions have found plenty frozen water on the moon.

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Moon

anomalistic month

Astronomy; Moon

The period of time it takes the Moon to pass between perigee (or apogee) passages - that is, the 27. 55455 day period during which the Moon moves from its closest (or farthest) point to the Earth, ...

anorthositic rock

Astronomy; Moon

A type of rocks found on the Moon in abundance at higher elevations which is calcium-rich.

aphelion

Astronomy; Moon

The point in a planet's orbit around the Sun when it is farthest from the Sun (opposite of perihelion).

apogean tide

Astronomy; Moon

The name for low tide when the Moon is at it's farthest point from the Earth.

apogean

Astronomy; Moon

Tide The low tide of the month that occurs when the Moon is at tide apogee (farthest from Earth).

apogee

Astronomy; Moon

The point in the Moon's orbit when it is farthest from the Earth (opposite of perigee).

apolune

Astronomy; Moon

The point in the orbit of an object around the Moon (such as a spacecraft) when it is farthest from the Moons surface.

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