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meteoroid

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.07 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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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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