| Down |
| 1. | The third of the gas giants |
| 2. | First man on the moon |
| 3. | What does a U.F.O. stand for |
| 4. | more than 8,000 artificial of these in the sky |
| 6. | It is now the smallest planet in our solar system |
| 7. | Man made robotic machine that explores planets |
| 10. | Its atmosphere traps in the heat |
| 12. | Name of the first ship on moon |
| 13. | Made up of dirty ice and and rock |
| 15. | Every planet in our solar system revolves around it |
| 19. | Only planet with know life |
| 20. | What are the two main elements that makes up the ring around saturn |
| 21. | A massive explosion that created our solar system |
| 23. | Made up of astroids that go around a planet |
| 24. | Is the biggest planet in our solar system |
| 29. | True or false, water existed on mars. |
| 30. | when was pluto classified a dwaf planet |