Across
- 2. earth in middle
- 4. the planet that has Olimpus mons
- 5. largest star
- 7. supported the geocentric system
- 9. the largest planet
- 11. simuler to earth in size
- 15. the rocky objects between mars and Jupiter
- 17. the world's first artificial sattilite
- 18. chunks of ice and dust
- 19. half the sun is made out of this gas
Down
- 1. planets that all have rings
- 3. won the space race
- 6. chunks of rock or dust in space
- 8. rocky debris revolving around earth
- 10. sun in the middle
- 12. the planet that is tilted on its axis
- 13. one of the two planets that have no moons
- 14. the planet with the AU of 30.5
- 16. a object that is made out of rock and dust and orbits earth