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

crescent Moon

Astronomy; Moon

A phase of the Moon just before and after the new moon, when only a thin curved section is illuminated by the Sun. The last crescent moon before the new moon is called the old crescent moon, and the ...

dark of the Moon

Astronomy; Moon

Another name given to the new moon. It's so named because during this phase, the Moon is not visible in the sky.

declination

Astronomy; Moon

The angle measured between the celestial equator and a celestial body, such as the moon, in the sky.

diurnal

Astronomy; Moon

A reference to a period of one day. In astronomy, diurnal generally refers to the motion of an object in a 24 hour period. An example would be Moon-rise. These activities repeat every 24 hours. ...

earthshine

Astronomy; Moon

The light of the sun that is reflected back into space by the Earth, and which can illuminate other objects such as the Moon. Earthshine can illuminate a young crescent moon so that the whole face ...

eclipse

Astronomy; Moon

The blocking of light from the sun when the earth comes between the sun and moon or the moon between the sun and earth. The Moon frequently moves between the Earth and the Sun, blocking out the ...

ecliptic

Astronomy; Moon

The imaginary plane formed by the earth's orbit around the sun or the plane formed by the apparent motion of the sun through the sky during a full year.