Astronomy

1. Small,icy solar system body that gives off a tail when passing close to the sun
6. Only planet in our solar system that has intelligent life
8. Powerful explosion that occurs when a star dies
10. Largest moon in our solar system
12. Mons The largest volcano in our solar system
13. Largest of Saturn's moons
15. Hottest planet in our solar system
17. An extended shell of icy objects that exists in the outer part of our solar system
18. Interstellar cloud of dust,hydrogen,helium and other ionized gas
19. First spacecraft to enter interstellar space

1. Creator of the show Cosmos
2. Planet with the longest rotation period in the solar system
3. Body of matter from outer space that enters Earth's atmosphere and manages to strike the ground
4. The biggest planet in our solar system
5. Inner four planets
7. belt Region of space beyond Neptune that contains many comets,asteroids,and other small bodies made mostly of ice
9. a region of space with such an intense gravitational field that no type of matter or radiation can escape
11. Coldest planet in our solar system
14. Outer four planets
16. Body of matter from outer space that enters Earth's atmosphere and burns up