Astronomy Review

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Across
  1. 3. used to be planet nine but now is a dwarf planet
  2. 5. smallest planet in the solar system
  3. 6. season that occurs when the north pole tilts away from the sun
  4. 8. the changing face of the moon each night
  5. 11. theory that the universe began with a huge explosion over 13 billion years ago
  6. 13. the only planet with life on it
  7. 16. force of attraction between objects
  8. 17. largest planet in the solar system
  9. 18. when the face of the moon is completely lit up
  10. 22. mainly found between Mars and Jupiter
  11. 23. the movement of a planet around the sun
  12. 24. when the face of the moon is completely dark
  13. 25. hottest planet in the solar system
Down
  1. 1. when the shadow of one object in space falls on another object
  2. 2. Earth in the center of the universe
  3. 4. the red planet
  4. 7. the spinning of a planet on its axis
  5. 9. planet with the most moons
  6. 10. space rocks that burn up in Earth's atmosphere
  7. 12. used a telescope to explore space
  8. 14. season that occurs when the north pole tilts toward the sun
  9. 15. planet with a storm known as the Great Dark Spot
  10. 19. planet made of smelly gases like methane and ammonia
  11. 20. sun in the center of the solar system
  12. 21. the cause of seasons on Earth