Moon

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.

Industry: Astronomy

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Moon

Waxing Moon

Astronomy; Moon

The period of the Moon's monthly cycle as it moves from a new Moon to a full Moon, increasing in visibility with respect to an Earth-bound observer.

Tides

Astronomy; Moon

The cyclical movement of bodies of water or land on the Earth or the Moon caused by the gravitational pull of the Earth, Moon, and Sun.

Transit

Astronomy; Moon

The point when the path of the Moon, the Sun, a star, or a planet takes it across the meridian.

Apogean tide

Astronomy; Moon

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

Celestial equator

Astronomy; Moon

An imaginary projection of the Earth's equator into the sky. The celestial equator is 90 degrees from each of Earth's celestial poles.

Breccia

Astronomy; Moon

A composite rock found on the moon and formed from small pieces of different materials, minerals and fragments of other rocks. Breccia is also found on the earth.