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Across
  1. 2. Home to the tallest mountain in the Solar System
  2. 5. The Moon has much weaker ... than Earth
  3. 7. Planet What is Mars nickname?
  4. 9. What is our Galaxy called?
  5. 10. Venus is sometimes called the ... Star
  6. 13. Home to the Great Red Spot
Down
  1. 1. What planet has the most obvious rings around it?
  2. 3. How many days is a year on Mercury?
  3. 4. The smallest planet and closest to the Sun
  4. 6. What kind of Star is the Sun?
  5. 8. The four most distant planets are sometimes called
  6. 11. The most similar sized planet to Earth
  7. 12. Which planet turns the opposite way to the rest of the planets?