SPACE AND UNIVERSE

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Across
  1. 4. A rock which turns around the Earth
  2. 5. A gathering of planets
  3. 7. A ship to travel in space
  4. 9. A ball in the solar system
Down
  1. 1. Nothingness
  2. 2. A sort of rock
  3. 3. Similar to the sun
  4. 5. A big star around which planets revolve
  5. 6. It is an event on time per year
  6. 8. living creature which lives on another planet