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        Sublimation of Comets | Comet Encounter

        Astronomers can use high-powered telescopes to discover amazing details about comets. Hubble images of Comet Ison show that it has formed a coma of gas in a thin atmosphere around its rocky core: a process known as sublimation. By looking at this data, scientists on earth can look deeper into the origins of the comet, even when millions of miles away.

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