Term
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Definition
| Sun and all the objects that orbit the Sun |
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Term
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Definition
| cloud of gas and dust in space |
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Term
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Definition
| curved path of one object around another object in space |
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Term
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Definition
| flattened circle, or oval |
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Definition
| point in a planet's orbit at which it is closest to the Sun |
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Term
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Definition
| point in a planet's orbit at which it is farthest from the Sun |
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Definition
| broad, flat plain on the Moon's surface |
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Definition
| round hold on the Moon's surface |
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Definition
| natural or artificial object orbiting another body in space |
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Term
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Definition
| caused by a crack in the crust of a planet |
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Term
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Definition
| large chunk of rock or metal that orbits the Sun |
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Term
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Definition
| small piece of rock or metal that travels through space |
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Definition
| rock or metal that enters Earth's atmosphere |
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Definition
| piece of rock or metal that falls on a planet or moon's surface |
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Definition
| lump of ice, frozen gas, and dust that orbits the Sun |
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Term
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Definition
| head or solid part of a comet |
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Term
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Definition
| gas cloud that surrounds the nucleus of a comet |
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Term
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Definition
| long, ribbonlike trail of comet dust and gas |
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