Across
- 3. a remotely operated vehicle
- 8. A collection of the Sun, eight planets, and their moons, comets, asteroids, meteroids,and dwarf planets revolving around the Sun.
- 9. the person who supervises a space mission from Mission control
- 12. Colonizing
- 13. a layer of gases surrounding a planet
- 15. Earth is _than Mars
Down
- 1. an artificial body placed in orbit around earth or moon or another planet in order to collect information or for communication
- 2. A multi-step process that allows a safe landing
- 4. A day on mars is
- 5. than a day on Earth
- 6. Mars is _ than Earth
- 7. The condition of being populated with excessively large numbers
- 10. The amount of time it takes to get to Mars
- 11. to bring into action and make usable
- 14. It could_ the problems of overpopulation on Earth