Across
- 2. A dwarf planet that is found in the Kuiper Belt
- 6. A small dwarf planet found in the Asteroid Belt
- 7. A region of asteroids found between Mars and Jupiter
- 9. This planet spins on its side
- 12. A small object that enter's Earth's atmosphere and causing a bright light
- 15. Nicknamed 'The Red Planet'
- 16. The four outer planets
- 19. The largest and fastest spinning planet
- 20. The only planet with living things on it
- 21. A small object that passes through the atmosphere and hits Earth
- 22. The smallest planet in our solar system with a revolution of 88 days
- 23. The movement of a planet around its central axis
Down
- 1. The first four planets of our solar system
- 3. A small object flying through space
- 4. The furthest planet in the solar system
- 5. The average distance between the Sun and Earth
- 7. A large object made of rock and ice
- 8. The movement of a planet around the sun
- 10. Central star of our solar system
- 11. The hottest planet in the solar system
- 13. An object of smaller pieces that are comprised of rock, ice, and dust
- 14. A large region of asteroids and dwarf planets behind Neptune
- 17. The only planet with a visible ring system
- 18. A large circular region of ice and other debris well beyond our solar system