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meteoroid

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.04 sec.
meteoroid: see meteor meteor, appearance of a small particle flying through space that interacts with the earth's upper atmosphere. While still outside the atmosphere, the particle is known as a meteoroid. Countless meteoroids of varying sizes are moving about the solar system at any time.
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meteoroid
any of the small celestial bodies that are thought to orbit the sun, possibly as the remains of comets. When they enter the earth's atmosphere, they become visible as meteors


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The blast occurred when a meteoroid revolving around the sun smashed into the moon.
Power of Science: Astronomy Teach planets, stars, comets, meteoroids, time zones, and more with this comprehensive kit--even build a space capsule
NASA should solicit more ideas for major space shuttle modifications, including additional efforts to protect the orbiters from meteoroids and space debris, the National Research Council says.
 
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