Solar System and The Universe

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Across
  1. 4. theory that the universe started as a tiny point and has been expanding ever since
  2. 6. feature of the sun
  3. 8. the last stage of our suns life cycle
  4. 10. galaxy galaxy with arms like a pinwheel
  5. 11. innermost layer of the sun
  6. 13. measurement that astronomers use when measuring distances in space
  7. 14. round or oval shape galaxy
  8. 15. the first stage of a star's life cycle
Down
  1. 1. center of our solar system
  2. 2. an object from space that lands on Earth's surface
  3. 3. outermost layer of the sun
  4. 5. galaxy with a featureless appearance
  5. 7. theory that the universe could stop expanding and collapse in on itself
  6. 9. galaxy with no clear shape
  7. 12. color of the sun when viewed from space