Ultimate Space Crossword Puzzle

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Across
  1. 1. This is the planet that we live on!
  2. 4. There are _______ planets in our solar system.
  3. 8. All of our planets and our Sun are called the _________.
  4. 9. A space cloud is called a ___________.
  5. 10. The study of space is called ______.
  6. 11. This is the biggest planet in our solar system.
  7. 12. This is the hottest planet in our solar system!
Down
  1. 2. People that go to space are called _________.
  2. 3. Everything that we know of is called the ______.
  3. 5. People that study space are called ________.
  4. 6. This is the closest planet to the Sun.
  5. 7. This is the name of the moon.
  6. 13. This is the name of the Sun.