Lorelei McArthur's Space Crossword

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Across
  1. 2. The process of 2 or more things merging together
  2. 5. Large cloud of dust and dust in space
  3. 7. Dirty space iceberg
  4. 8. A rock from space crashing towards the Earth
  5. 9. Space circulation
  6. 10. The distance from the center of the Earth to the center of the Sun: ________ unit
  7. 12. A world that orbits a star
  8. 14. Luminous ball of gas
  9. 16. Circulate in place
  10. 17. A device to see space and stars
  11. 19. A formation or group of stars
Down
  1. 1. A world that orbits a planet
  2. 3. A device that measures the spectrum of light
  3. 4. The belief that stars have power
  4. 6. Rocks found in space between Jupiter and Mars
  5. 10. The study of space
  6. 11. The name for circling around something
  7. 13. The distance light travels in an year
  8. 14. When a star explodes
  9. 15. When objects move by being seen
  10. 18. Twinkle,twinkle little ____