Across
- 1. - The fourth planet from the Sun, often called the "Red Planet."
- 5. - A person who travels and works in space.
- 8. - The third planet from the Sun, the one we live on.
- 9. - Earth's natural satellite that orbits around it.
- 10. - A large celestial body that orbits a star and shines by reflected light.
Down
- 2. - A hot ball of glowing gases that produces its own light.
- 3. - The star at the center of our solar system.
- 4. - A huge collection of stars, gas, and dust held together by gravity.
- 6. - A creature from another planet or extraterrestrial world.
- 7. - A vehicle that is used to travel into space.