UNIVERSE
ASTEROIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When a comet nears the sun, what happens to the nucleus?
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Becomes solid
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Becomes visibile
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Becomes gas
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It disappears
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Explanation:
Detailed explanation-1: -The nucleus contains icy chunks, frozen gases with bits of embedded dust. A comet warms up as it nears the Sun and develops an atmosphere, or coma. The Sun’s heat causes the comet’s ices to change to gases so the coma gets larger. The coma may extend hundreds of thousands of kilometers.
Detailed explanation-2: -The coma is a halo of evaporated gas (water vapor, ammonia, carbon dioxide) and dust that surrounds the nucleus. The coma is made as the comet warms up and is often 1, 000 times larger than the nucleus. It can even become as big as Jupiter or Saturn (100, 000 kilometers).
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