Across
- 2. Jupiter's largest moon.
- 5. Where the Apollo missions were launched from.
- 7. Layer of gases that surrounds the Earth.
- 10. The large volcano on Mars.
- 12. Person trained to be on a spacecraft.
- 13. The closest planet to the Sun.
- 14. First to walk on the moon.
- 15. Planet that spins on its side.
- 17. When the moon passes in front of the Sun.
- 19. The sixth planet from the Sun.
- 20. Program that took astronauts to the moon.
Down
- 1. Our galaxy.
- 2. Discovered most of the planets.
- 3. This is known as a shooting star.
- 4. The planet with the highest gravity.
- 6. Where most space missions were/are controlled from.
- 8. Natural satellite of the Earth.
- 9. The hottest planet.
- 11. Where people are currently living in space.
- 16. Center of the solar system.
- 18. Orbit around the sun takes 365 days.