Astronomy

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Across
  1. 1. Small,icy solar system body that gives off a tail when passing close to the sun
  2. 6. Only planet in our solar system that has intelligent life
  3. 8. Powerful explosion that occurs when a star dies
  4. 10. Largest moon in our solar system
  5. 12. Mons The largest volcano in our solar system
  6. 13. Largest of Saturn's moons
  7. 15. Hottest planet in our solar system
  8. 17. An extended shell of icy objects that exists in the outer part of our solar system
  9. 18. Interstellar cloud of dust,hydrogen,helium and other ionized gas
  10. 19. First spacecraft to enter interstellar space
Down
  1. 1. Creator of the show Cosmos
  2. 2. Planet with the longest rotation period in the solar system
  3. 3. Body of matter from outer space that enters Earth's atmosphere and manages to strike the ground
  4. 4. The biggest planet in our solar system
  5. 5. Inner four planets
  6. 7. belt Region of space beyond Neptune that contains many comets,asteroids,and other small bodies made mostly of ice
  7. 9. a region of space with such an intense gravitational field that no type of matter or radiation can escape
  8. 11. Coldest planet in our solar system
  9. 14. Outer four planets
  10. 16. Body of matter from outer space that enters Earth's atmosphere and burns up