Referring to the sun

Moon phase when more than half the moon can be seen

Darker, cooler areas on the Sun's surface

Moon phase when less that half the moon can be seen

Pull of one body on another: it keeps the planets in orbit around the sun.

Appearance of the moon due to the reflection and place of its orbit

Referring to the Moon

Imaginary line a planet spins on. It passes through the poles

A bowl-shaped impression made by a meteorite on a planet or moon

The rise and fall of the oceans-caused by the pull of the Moon's gravity.

The principal that explains why objects in motion stay in motion

Time of the year with similar temperatures due to amount of direct sunlight

A rock from space that impacts a planet or natural satellite

The path that an object makes around another object

An object that orbits a planet

The circular movement of one object around another object.

To spin on an axis.

A rock from space that burns up in a planet's atmosphere. A.K.A. a falling star

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