Planets

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