Across
- 2. fifth biggest satellite
- 4. first space station of USA
- 6. planet of oceans
- 8. biggest satellite in the solar system
- 11. exploding stars
- 13. the most abundant element in the universe
- 14. biggest satellite of the dwarf planet Pluto
- 15. nearest Star on Earth next to sun
- 17. phobos and Deimos are its satellite
- 18. the coldest planet
- 20. fastest spinning planet
Down
- 1. hottest planet
- 3. it is a Latin term for "clouds"
- 5. located between Mars and Jupiter
- 7. nearest galaxy to Milky Way
- 9. name of the first animal sent into the space
- 10. the fastest revolving planet around the sun
- 12. a belt of Constellations
- 16. planet known for its "great dark spot"
- 19. latin name for sun