Across
- 2. The planet with highest number of moons
- 5. the sixth largest planet, and the hottest one
- 6. name for vehicles designed to move around on the surface of a planet
- 7. the trajectory or path of a planet
- 9. ____ comet, last seen in 1986
- 10. name for vehicles like Maven and Mars Odyssesy
- 12. the first
Down
- 1. number of people who have walked on moon
- 3. rocky remnants from the early formation of our solar system
- 4. the first animals sent in space
- 8. The space program that launched the first artificial satellite
- 11. Sun is a _____