Comet (Comet) is a type of object in the solar system orbit the sun. Contributed to sublimate into gas when they approach the sun. The layer of dust and gas that surrounds hazy. And fried until the outside looks like a tail stretched out. The phenomenon of solar radiation on the nucleus of the comet. A comet nucleus, or center "Dirty snowballs" composed of ice. Carbon dioxide, methane, ammonia and dust with hard rock mixed together. With diameters ranging from a few kilometers to tens of kilometers.
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