Across
- 2. "The red planet"
- 6. The closest planet to the Sun
- 7. The brightest planet in the solar system
- 10. The theory that the universe started from a large explosion
- 11. The collapsed core of a supergiant star
- 13. When a planet is most made of rock and minerals
- 15. Earth's natural satellite
- 17. When a planet is made of mostly gas
- 18. The furthest planet from the sun
- 19. The largest planet in the solar system
Down
- 1. What the "SA" in NASA stands for
- 3. Famous for its rings
- 4. The most well known dwarf planet, shares a name with a dog
- 5. Tool used to look at the stars
- 6. Large spiral galaxy where we live
- 8. It rotates on its side
- 9. The family of constellations that lie along the ecliptic
- 12. Someone who explores space
- 14. The only planet with life
- 16. A room containing tools to study the stars