Across
- 2. Twin of Earth in size but hotter
- 5. Red planet known for dust storms
- 7. Rocky objects mostly found between Mars and Jupiter
- 10. Moon of Jupiter, believed to have a subsurface ocean
- 11. Bright tail-bearing space traveler
- 14. Fifth planet from the Sun
- 15. Planets made mostly of gas
- 16. Coldest and most distant known planet
- 18. The star at the center of our solar system
- 19. A minor planet, often found in the asteroid belt
- 20. Earth's natural satellite
Down
- 1. A dwarf planet in the Kuiper belt
- 3. Blue planet with a tilted axis
- 4. Largest planet in the solar system
- 6. Sixth planet from the Sun
- 8. Spacecraft that carries instruments
- 9. The planet famous for its rings
- 12. The closest planet to the Sun
- 13. The path a planet follows around the Sun
- 17. The largest moon of Saturn