Space

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Across
  1. 5. orbits a star
  2. 8. our atar
  3. 9. our galaxy
  4. 11. orbits a planet
  5. 12. star, with planets, moons and asteroids orbiting it
  6. 14. ball of rock moving through space
  7. 15. hottest planet
Down
  1. 1. force that pulls everything together
  2. 2. collection of stars
  3. 3. everything exists here
  4. 4. nuclear reactions in stars
  5. 6. biggest planet
  6. 7. burning ball of gas making light and heat
  7. 10. dust ice and rock moving through space
  8. 13. planet with most rings
  9. 16. our planet