Crossword... IN SPACE!

1234567891011121314151617181920
Across
  1. 2. orbits a galactic center
  2. 5. a celestial body once it has crashed into the ground
  3. 7. the largest planet in our solar system
  4. 8. the closest planet to our Sun
  5. 10. the planet with the most famous rings
  6. 11. the elliptical movement of one celestial body around another
  7. 12. has a toxic atmosphere and extreme surface temperature
  8. 17. what happens when a massive star finally dies
  9. 20. ___________ space station
Down
  1. 1. gravity is so strong here that light cannot escape
  2. 3. a celestial body before it hits the atmosphere
  3. 4. the process powering a star
  4. 6. a moon orbiting Jupiter, a future potential home
  5. 9. the largest asteroid in our solar system
  6. 13. a star nursery
  7. 14. orbits a star
  8. 15. orbits a planet
  9. 16. a collection of hundreds of thousands of stars
  10. 18. known as the red planet
  11. 19. orbits a star, has a long tail