Space Stuff

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Across
  1. 4. The densest thing we know.
  2. 10. Everything we know
  3. 12. The planet with the largest rings
  4. 13. The study of space
  5. 15. The smallest planet
  6. 17. cluster A group of galaxies
  7. 18. The largest planet
  8. 19. Age of universe (in billion years
Down
  1. 1. A system with two stars orbiting each other in a solar system
  2. 2. Closest star to our solar system
  3. 3. The hottest planet
  4. 4. The color of the hottest stars
  5. 5. The “False Planet”
  6. 6. A collection of stars, black holes, planets, gas, and other space debris
  7. 7. The sideways planet
  8. 8. Created by the death of some stars, any denser would make it a black hole.
  9. 9. The color of the coolest giant stars
  10. 11. Nickname “The Red Planet”
  11. 14. The farthest planet
  12. 16. Our home planet