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Structure of a Comet |
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| As a comet approaches the Sun, ice begins to boil, releasing dust and gas from the rocky nucleus. The dust and gas create tails millions of times larger than the nucleus. The tails of some comets are large enough and reflect enough light to be visible from Earth. | ||||||
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| Appears in these articles: | ||||||
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| Astronomy; Solar System; Comet | ||||||
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