Night Sky Review Puzzle

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Across
  1. 2. Not a planet, but a dwarf planet
  2. 4. An egg shaped moon
  3. 5. The red plane... covered in iron oxide (rust)
  4. 10. A scientist who studies space
  5. 12. The hottest planet, because of thick clouds of poisonous gas
  6. 13. A person who travels to space
  7. 15. a fingernail shaped moon (sliver)
  8. 16. To travel around an object
Down
  1. 1. The planet with the big red spot
  2. 3. A hot ball of gas and dust that is the center of the Solar System
  3. 6. The planet with the brightest rings
  4. 7. To spin in place around an imaginary axis
  5. 8. The planet that is tipped on its side
  6. 9. The only planet in our Solar System that can sustain life
  7. 11. The closest planet to the Sun
  8. 14. The coldest planet and farthest from the sun