Space Puzzle

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Across
  1. 2. the center of our solar system.
  2. 4. the smallest planet in our solar system
  3. 5. this planet is Earth's sister planet
  4. 9. Scientists are studying this planet to see if humans can live here one day.
  5. 11. this planet is the furthest away from the sun.
Down
  1. 1. this planet is the biggest planet in the solar system.
  2. 3. this dwarf planet used to be our ninth planet.
  3. 4. the Earth has one ___ , but Jupiter has 79!
  4. 6. this planet is 70% water.
  5. 7. this planet is known for its beautiful rings.
  6. 8. this planet is the coldest planet in our solar system.
  7. 10. we can use this to see planets and stars.