Space rocks

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Across
  1. 4. clue elliptical
  2. 6. clue meteors
  3. 8. clue revolution
  4. 9. clue meteoroids
  5. 10. (for the puzzle you will have to make dwarf planet one word)clue dwarfplanet
Down
  1. 1. clue heliocentric
  2. 2. clue asteroids
  3. 3. clue penumbra
  4. 5. clue comets
  5. 7. clue satellite