Across
- 1. lies at the very center of our solar system
- 3. first satellite launched (by Russians)
- 5. name of the galaxy in which we live
- 6. closet planet to sun
- 7. hottest planet
- 9. first manned mission to moon
- 10. rocks that fly through space
- 11. planet with most moons
Down
- 2. first man to walk on moon
- 4. planet with lots of rings
- 8. rocket that lifts spacecraft into orbit