Asteroids, meteors, and comets

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Across
  1. 3. Small, irregularly shaped chunks of rock
  2. 8. a regular, repeating path that one object in space takes around another one
  3. 9. A meteor that hits earth's surface.
  4. 10. the sun together with the group of celestial bodies that are held by its attraction and revolve around it
Down
  1. 1. a junkyard of countless icy bodies left over from the solar system's formation
  2. 2. a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere
  3. 4. hundreds of thousands of asteroids in disk shaped region between mars and jupiter.
  4. 5. A shooting star
  5. 6. Small objects that orbit our sun
  6. 7. a vast shell of billions of comets