Across
- 5. searched for microorganisms on the martian surface
- 7. mass of 4x the Earth
- 9. Earth has all three forms of this
- 10. One of Saturn's moons and atmosphere made of nitrogen
Down
- 1. the presence of ____ indicates life on the planet
- 2. Life is based on ____ and water
- 3. the paradox asking where the aliens are
- 4. equation used find the amount of extraterrestrial life
- 6. 600 light years away
- 7. permanent day and night side
- 8. One of Jupiter's moons