#meteoroid  (astronomy) any of the small solid extraterrestrial bodies that hits the earth's atmosphere
  supertype:  extraterrestrial_object__estraterrestrial_body  a natural object existing outside the earth and outside the earth's atmosphere
  subtype:  meteorite  stony or metallic object that is the remains of a meteoroid that has reached the earth's surface
     subtype:  aerolite  a stony meteorite consisting of silicate minerals
     subtype:  micrometeorite  a meteorite so small that it drifts down to earth without becoming intensely heated in the atmosphere
     subtype:  pallasite  a meteorite composed principally of olivine and metallic iron
     subtype:  siderite  a meteorite consisting principally of nickel and iron
  subtype:  meteor_swarm  a group of meteoroids with similar paths

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