the galaxy?

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Across
  1. 3. Things we use to observe on mars
  2. 6. Bright objects in the sky
  3. 7. floating chunk of space rock that orbits the sun
  4. 9. this thing orbits earth and has phases
  5. 11. is the sun a panet
  6. 12. the planet we live on
  7. 13. how many planets are their in our solar systems
  8. 14. this star is the center of the solar system
  9. 15. what is a star made of?
  10. 17. what is the 4th planet from the sun?
  11. 20. Things we use to observe the stars
Down
  1. 1. floating chunk of space rock that does not orbit the sun
  2. 2. about how many moons dose Jupiter have?
  3. 4. What is our galaxy called
  4. 5. what is the 7th planet from the sun?
  5. 6. this planet is most known for its rings
  6. 8. what is pluto?
  7. 10. what color is the sun
  8. 14. What are asteroids?
  9. 16. Can a star turn into a planet?
  10. 18. this was declared not a planet in 2006
  11. 19. Does sound travel in space