astronomy

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Across
  1. 2. bunch of stars with no pattern
  2. 5. the idea of the universe
  3. 6. the main part of an hr diagram
  4. 7. the hotness or coldness of something
  5. 10. brightness
  6. 11. blank arms
  7. 12. a system of stars, gas, and dust
  8. 13. our gallaxy
  9. 14. round-like shape
Down
  1. 1. the cycle of a star
  2. 3. it shows the range of electromagnetic radiation
  3. 4. the impact of a forces
  4. 8. a hole of nothingness
  5. 9. when objects to appear to shift toward the red
  6. 10. a distance light travels in a year