Across
- 2. Mercury's exosphere is mostly made of _______
- 4. the closest planet to the Sun
- 6. the nearest moon of Jupiter which may have water
- 7. the second planet from the Sun
- 9. the 5th planet from the Sun
Down
- 1. the direction of rotation of Venus
- 3. the number of moons of Venus
- 4. the fourth planet from the Sun
- 5. Venus' atmosphere is mostly ________________
- 8. the third planet from the Sun