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4 Cards in this Set
- Front
- Back
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solar system |
system of eight planets enormous other objects that orbit our sun,all held in place by the sun's gravity. |
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astronomical unit |
unit of measure that equals 150 million km, which is the mean distance from earth to the sun. |
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comet |
large body of ice and rock that orbits the sun. |
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meteorite |
any rock from space that survives its plunge through the atmosphere and leads on earth's surface. |
