Space

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Across
  1. 2. planets
  2. 3. colourful thing in the sky after it rains
  3. 4. year/is the distance that light can travel in one year in a vacuum
  4. 5. planet to the sun
  5. 9. in the night sky
  6. 11. rock flying through space
  7. 13. Belt/distant objects than circle the Sun
  8. 14. is a physical force that pulls objects together
  9. 15. giants/They are the large outer planets of our Solar System
  10. 17. we live
  11. 19. system with stars and dust
  12. 20. a half of the celestial sphere divided into two halves by the horizon
Down
  1. 1. absence of gravity; a condition of weightlessness
  2. 6. biggest planet
  3. 7. smallest planet
  4. 8. a star dies it appears
  5. 10. object, volume
  6. 12. object that supplies heat
  7. 16. is an element with the atomic number 2.
  8. 18. line at which the sky and Earth appear to meet