Earth and space

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Across
  1. 1. one whole spin of an object on its axis
  2. 6. a spacecraft that gathers data without a crew
  3. 8. a group of stars that forms a pattern
Down
  1. 2. any of the four planets beyond Mars
  2. 3. an imaginary line around which an object spins
  3. 4. any of the four closest planets to the sun
  4. 5. one full orbit around the sun
  5. 7. a natural object that revolves around a planet
  6. 9. an explosive eruption of waves and particles
  7. 10. a rocky mass that revolves around the sun