Space rocks

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Across
  1. 4. the revolution of one object around another
  2. 6. small body of matter from outer space
  3. 8. the objects orbital motion around another object
  4. 9. small body moving in the solar system
  5. 10. small planet
Down
  1. 1. a model in which the sun is assumed
  2. 2. a small body orbiting the sun
  3. 3. the outer part of a conical shadow
  4. 5. a tail of gas and dust particles pointing away from the sun
  5. 7. placed in orbit to around the earth or moon or a planet