Across
- 2. There is little in space
- 5. Keeps the earth warm
- 7. A piece of metal or rock that falls from space
- 8. A planet that has three moons
- 9. Closest planet to earth
Down
- 1. Humans live here
- 2. Name for a collection of millions of stars
- 3. Used to look at stars during the night
- 4. The biggest planet in our solar system
- 6. How astronauts travel to the moon