Universe

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Across
  1. 4. what is a huge collection of gas, dust, and billions of stars
  2. 5. The ____formed 13.7 billion years ago
  3. 8. the initials for cosmic magnetic radiation
  4. 9. the theory of how the universe formed
  5. 10. the ____of red light is longer than that for blue light
  6. 11. galaxy that contains our solar system
  7. 13. galaxies formed from
  8. 15. the entire universe is bathed with this leftover radiation
  9. 16. the distance light travels in a year
  10. 18. type of light humans can see
  11. 19. located on ______ visible light is broken into a band of colors when it passes through a prism
  12. 20. planet inhabited by us
  13. 21. the Hubble telescope is named after Edwin
Down
  1. 1. the type of satellite created
  2. 2. this indicates that a star or galaxy is moving away from the observer
  3. 3. Humans can see only the energy in the visible light part of the ________
  4. 6. planets orbit this star
  5. 7. if two galaxies collide they can form a _____galaxy
  6. 12. the galaxy with arms
  7. 14. galaxies formed from
  8. 17. our planet is part of what system