The Solar System

3. A word that best describes the texture of an asteroid
5. A body from outer space that is able to pass through the Earth's atmosphere and strike at the ground
10. The envelope of gases surrounding Earth or another planet
12. The red planet
13. A small part broken off of something
15. Not even or balanced
17. A straight line that goes directly through a circle of sorts
19. When two or more objects crash into each-other
20. The planet that is 'exactly right for humans'
21. The giant star in which the planets orbit around

1. Was named a dwarf planet in 2006
2. To move in a circular motion around something
4. What an object is made out of
6. The planet closest to the sun
7. A celestial object made of ice and dust
8. The largest gas giant
9. A planet that is most famous for its bright rings
11. One of the names for the three types of galaxies
14. When this body from outer space enters Earth's atmosphere, it becomes ablaze
16. Earth's sister planet
18. The natural satellite of the Earth
19. The largest asteroid ever found