Across
- 2. One Mars day
- 7. the biggest explosion that humans have ever seen.
- 9. A mission that put the first man on the moon
- 10. Sometimes called shooting stars
- 11. Used to be the ninth planet from the sun
Down
- 1. has an event horizon
- 3. When an object crashes into a larger solid object
- 4. First spacecraft to leave the solar system
- 5. relating to the moon
- 6. Surrounds the solar system
- 8. These are made of ice and have tails