Space

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Across
  1. 3. Invented by Galileo
  2. 5. A theory Einstein came up with
  3. 6. The most likely way for the universe to die
  4. 9. The sun
  5. 11. The moon
  6. 12. A planet in our solar system with huge ring
  7. 13. Tries to pull the universe apart
  8. 14. A particle of light
  9. 15. Death of a huge star
  10. 16. Pale blue dot
  11. 17. At the center of the black hole
Down
  1. 1. Inescapable
  2. 2. All the universe we can see and interact with
  3. 4. Sphere of burning gas (mostly hydrogen)
  4. 7. Can only interact with other stuff with gravity
  5. 8. The closest star to the sun
  6. 10. Uranus