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Solar System Crossword

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Across
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Explored Mars in 1971
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Comet that appears in Earth's sky every 76 years
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Theory of the origin of our solar system in which planets were formed from a rotating disk of dust and gasses
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Mercury, Venus, Earth, Mars
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Encircled by winds exceeding 1000 kilometers
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Planet on which scientists found water recently
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Jupiter, Saturn, Uranus, Neptune
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The most prominent feature of Saturn
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Space rover that roved the surface of Mars
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Rotates on its side
Down
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Planet closest to the sun
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Known as "earth's twin"
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Colliding matter from irregularly shaped bodies colliding
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A telescope that travels through space
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Flying mountains
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The glowing head of the frozen gases traveling through the solar syatem
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Shooting stars
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Has a mass of 2 1/2 times greater than all other planets
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Cloud of dust and gas in space
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Current science states that it is not a planet in our solar system
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A moon of Neptune
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Rocky and metallic materials held together by frozen gasses