- Types:
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comet
(astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit
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meteor, meteoroid
(astronomy) any of the small solid extraterrestrial bodies that hits the earth's atmosphere
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meteorite
stony or metallic object that is the remains of a meteoroid that has reached the earth's surface
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meteor swarm
a group of meteoroids with similar paths
