The universe

123456789101112131415
Across
  1. 4. Planets revolve around this
  2. 6. How long did the creation of the solar system take?
  3. 7. Second element created
  4. 12. E=MC^2
  5. 13. Compresses _____ until Nuclear fusion
  6. 14. Center of Nebula
  7. 15. Most abundant element in the universe
Down
  1. 1. Everything came from one point 13.8 billion years ago
  2. 2. What the sun is made up of
  3. 3. How stars are formed
  4. 5. Stars are surrounded by ____ and rotates
  5. 8. Number of planets in our solar system
  6. 9. Building blocks of matter
  7. 10. planet closest to the sun
  8. 11. Biggest planet