Quiz from another planet

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Across
  1. 2. an ancient greek god
  2. 3. the fastest thing in the known universe
  3. 6. the most prety godness out of the twelve
  4. 8. the first human made sattlite to reaach out of our planet system
  5. 12. the source of life in our planet
  6. 13. our home
  7. 14. the power that keep the planets 'organised'
  8. 16. the ice giant and one of the ancient greek gods
  9. 18. biggest star in our planet system
  10. 19. earth's satelite
Down
  1. 1. the power that spaceships use
  2. 4. the rays of power that sun releases
  3. 5. the most famous comet
  4. 7. krono's biggest satellite
  5. 9. the most common gas in our planet
  6. 10. most phenomenal including moon and the sun
  7. 11. the black 'things' on moon
  8. 15. collection of spaceships sent in space with astronauts with them
  9. 17. the protective filter that keep us safe from the sun's rays