Crossword... IN SPACE!

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Across
  1. 5. orbits a planet
  2. 6. a celestial body once it has crashed into the ground
  3. 7. has a toxic atmosphere and extreme surface temperature
  4. 10. orbits a star, has a long tail
  5. 11. a collection of hundreds of thousands of stars
  6. 12. the largest asteroid in our solar system
  7. 14. the process powering a star
  8. 15. what happens when a massive star finally dies
Down
  1. 1. orbits a star
  2. 2. a moon orbiting Jupiter, a future potential home
  3. 3. the closest planet to our Sun
  4. 4. a star nursery
  5. 5. a celestial body before it hits the atmosphere
  6. 8. orbits a galactic center
  7. 9. known as the red planet
  8. 13. the planet with the most famous rings