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| 1. | This planet has a thin atmosphere and may once have had water. |
| 2. | The direction that the planets orbit around the Sun. |
| 3. | The time it takes the Earth to orbit the Sun one complete time. |
| 5. | Small pieces of rock that have hit a planet/moon. |
| 6. | The color of the hottest stars. |
| 7. | The direction that Venus and Uranus spin on their axis. |
| 9. | The scientific tool that allowed early astronomers to view space. |
| 10. | This planet is covered in thick clouds of sulfuric acid and carbon dioxide |
| 11. | Smaller pieces of rock floating in space. |
| 15. | The term used for the inner planets. |
| 19. | The force that "holds" the planets and other objects around our sun. |
| 20. | This planet also has a raging storm known as the Dark Spot and is blue like the sea. |
| 21. | This planet is in the Goldilocks region of our Solar System. |
| 22. | Gas clouds in space from which stars, planets, etc. are formed. |
| 23. | The action verb of an object that spins around an imaginary line/axis. |
| 28. | A bubbling ball of hydrogen and helium gas. |