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| a large cloud of gas and dust in intersteller space a region in space where stars are vegas |
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| a rotating cloud of gas and dust from which the sun and planets formed |
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| the avarage distance between earth and the sun approximately 150 million kilometers |
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| on of the highly dense plants nearnest to the sun mercury, venus, mars and earth |
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| the counterclockwise spin of a planet or moon as seen from above the planet north pole |
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| the clockwise spin of a planet or moon as seen from above the planets north pole |
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| a planet that has a deep, massive atomosphere, such as jupiter saturn uranus or neptune |
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| a natural or artificial body that revolves around a planet |
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| the change in the sunlit area of one celetial body as seen from another celestial body |
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| an event in which the shadow of onecelestrial body falls on another |
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| a small body of ice, rock, and cosmic dust that follows an elliptical orbit around the sun and that gives off gas and dust in the form of a tail as it passes close to the sun |
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