Solar systems and Planets

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Across
  1. 5. A terrestrial planet that we live on
  2. 7. Group of stars born from the same cosmic cloud
  3. 8. Belt Between Mars and Jupiter
  4. 11. The number of planets in our solar system
  5. 12. Dwarf planet between Mars and Jupiter in the asteroid belt
  6. 13. Tilted on it's side
  7. 15. Used to be a planet now is a dwarf planet
  8. 16. Our solar system
  9. 18. The smallest planet and the first planet in the solar system
  10. 19. 4th planet from the sun and the second smallest Planet
Down
  1. 1. How old is our solar system
  2. 2. Planets are luminous
  3. 3. Jupiter, Saturn, Uranus, Neptune
  4. 4. The planet Pluto's orbit crosses
  5. 6. Mercury, Venus, Earth, Mars
  6. 7. Second biggest planet and has rings
  7. 9. Must orbit around a star, has enough mass to be pulled into a sphere and have gravity, and it dominates it's orbit
  8. 10. The Hottest planet that has an atmosphere of gas
  9. 14. Biggest star in our solar system
  10. 17. Biggest Planet