Te Solar System: Comets
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| Coma | A cloud of dust and gases that surrounds the nucleus of a comet
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| Comet | A ball of dust, ice, and gases that travels around the sun. It is much smaller than a planet
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| Dust tail | This type of comet tail forms when solar wind separates dust from the coma, pushing it outward away from the Sun in a slightly curved path
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| Nucleus | The center of the head of a comet: consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail
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| Short period comet | A comet that orbits the Sun in less than 200 years
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| Ion tail | This type of comet tail forms when solar wind separates gases from the coma, pushing them outward away from the Sun in a straight path
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| Hydrogen envelope | Hydrogen gas surrounds the coma of the comet and trails along for millions of miles
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