Cosmic Camera

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Across
  1. 2. Group of thousands of stars
  2. 3. A nebula is...
  3. 6. Machine you use to see things
  4. 9. Someone who studies stars
  5. 10. Another word for "meeting"
  6. 11. The distance light travels in one year
  7. 15. A mysterious substance
Down
  1. 1. How many miles is a lightyear?
  2. 4. Place where astronomers work
  3. 5. Revealed means what?
  4. 7. The Sun is a what?
  5. 8. Giant cloud of gas
  6. 12. Huge rock flying through space
  7. 13. Another word for "find"
  8. 14. Another word for "picture"