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| travel in a closed path around an object such as Earth does as it moves around the sun |
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| the path that an object takes as it revolves around another object |
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| the spinning of earth on its axis |
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| an imaginary line that passes through earth's center and its north and south poles |
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| the passing of an object through the shadow of another |
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an instrument that magnifies, or makes larger, distant objects |
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| any natural body like the moon that orbits another object |
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| everything that exists in space: planets, stars, dust, gases and energy |
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| group of stars, gas and dust (ex: Milky Way) |
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| spots on the sun that are darker because they are cooler |
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