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Definition
| A celestial body that orbits the sun, is round because of its own gravity, and has cleared the area around its orbital path. |
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Term
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Definition
| The sun and all of the planets and other bodies that travel around it. |
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Term
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Definition
| A natural or artificial bodt that revolves around a celestial body that is greater in mass. |
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Term
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Definition
| The change in the illuminated area of one celestial body as seen from another celestial body; phases of the moon are caused by the positions of earth, the sun, and the moon. |
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Term
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Definition
| An even in which the shadow of one celestial body falls on another. |
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