The Milky Way

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Across
  1. 2. what is jupiter's nickname?
  2. 7. who was the first man on the moon?
  3. 9. what is the biggest planet?
  4. 10. what is the hottest planet?
  5. 12. how long does it take mercury to orbit the sun in days?
Down
  1. 1. how far is the earth tilted on its axis in degrees?
  2. 3. what is the biggest star?
  3. 4. what two things were formed around 4.6 billion years ago?
  4. 5. what is the smallest planet in our solar system?
  5. 6. how many planets are in our solar system?
  6. 8. how many times larger is the sun than the earth?
  7. 11. which two planets do not have any moons?