SPACE ADVENTURE

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Across
  1. 2. Smallest planet of all which is 4879km wide
  2. 4. Mainly made from hydrogen and helium gas
  3. 9. Found between the planets Mars and Jupiter
  4. 10. Planet that has largest volcano in solar system called Olympus Mons
Down
  1. 1. This planet surrounded by thick and acidic clouds
  2. 3. Oberon and Titania moons belongs to this planet
  3. 5. This mostly made of snow, ice and dust
  4. 6. Mars has two moons, Deimos and
  5. 7. The Great Red Spot on Jupiter is
  6. 8. The least dense planet and the second largest planet solar system