Across
- 4. third planet from the sun; only planet humans have walked on
- 5. place where astronauts live and work in space
- 6. dwarf planet with two moons
- 7. planet closest to the sun
- 8. Saturn, Jupiter, Uranus, and Neptune have ____ around them
- 10. the red planet; humans have sent robots here
- 13. planet that rotates on its side
- 14. number of planets in our solar system
- 15. planet with the brightest rings
- 17. instrument used for seeing stars and planets clearly
- 19. Neil Armstrong was the first person to walk on the _____.
Down
- 1. the force that pulls you to the center of a planet or star
- 2. warmest planet; cloudy planet
- 3. large planet known for the Great Red Spot
- 5. our sun and the objects that orbit around it
- 9. furthest planet from the sun
- 11. to turn on an axis
- 12. the star closest to Earth
- 16. an American space traveler
- 18. it takes Earth 365 days to ____ the sun
- 20. number of stars in our solar system