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10 Cards in this Set

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Imaginary line that passes through the Earth's center and its North and South Poles.
Axis
Holes on the surface of a moon or a planet formed when meteors hit the planet or moon.
Crater
What occurs when one object passes through the shadow of another.
Eclipse
The force that pulls all objects in the universe toward one another.
Gravity
The path a heavenly body takes as it revolves around a star or a planet.
Orbit
To turn completely around, such as the Earth rotating on its axis.
Rotate
To travel in a closed path.
Revolve
Any natural body, like the moon, or artificial object that orbits another object.
Satellite
It takes the moon about 28-29 days to go through a lunar cycle as it revolves around the earth.
Lunar Cycle
Has one Sun and nine planets
Solar System