Outer Space, No Capitals in the answers.

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Across
  1. 3. How many moons does Neptune have?
  2. 4. This is one of the things are caused by Earth's rotation on its axis
  3. 5. What is the star closest to us?
  4. 6. How many moons does Venus have?
  5. 7. This is one of Mars's Moons
  6. 9. This planet takes the shortest time to revolve around the sun.
  7. 10. What galaxy are we located in?
  8. 12. A giant storm located on Jupiter.
Down
  1. 1. The biggest planet in our solar system
  2. 2. The hottest planet in our solar system
  3. 3. This is caused by Earth's revolution around the sun
  4. 8. They have no true surface
  5. 11. They have a rocky surface