Space!

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Across
  1. 3. the farthest planet from the sun
  2. 4. Einsteins equation
  3. 6. what is the end result of the solar nebula?
  4. 7. how many years for solar systems to form?
  5. 8. planet most like Earth
  6. 11. the first celestial body
  7. 12. the pull that allows the objects in a solar system to rotate
  8. 13. the star that our solar system revolves around
  9. 14. planet with rings
Down
  1. 1. the theory that the universe is expanding from a center point
  2. 2. the part of the nebula that gains mass and compresses matter until nuclear fusion
  3. 5. the first atom and most abundant in the universe
  4. 9. what are stars surrounded by?
  5. 10. how many planets are in our solar system