science

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Across
  1. 2. millions of stars
  2. 5. measure of time
  3. 6. displacement of an object by pov
  4. 7. empty space
  5. 9. thermodynamic temp
  6. 12. subatomic particles
  7. 13. change in frequency
  8. 14. region or climate characterized by temp
  9. 15. strong,weak,elec,grav
Down
  1. 1. blue wavelengths
  2. 3. radiation and gravity domination
  3. 4. nonluminous material
  4. 8. separation of charges
  5. 10. no radiation or matter can escape
  6. 11. astronomical distances