Space terms

1. A broadly accepted theory for the origin and evolution of our universe (no space)
4. The biggest gas giant in our Solar system, home to the great red spot
9. An instrument used to observe distant objects
10. Matter that is too dim to be detected by telescopes. Astronomers infer its existence by measuring its gravitational influence (no space)
12. Space rocks that lie in the Kuiper Belt, that occasionally come flying into the inner Solar system
14. The orbital motion of one object around another
16. The planet we live on
18. The planet that has a density less than water, and is famous for having rings.
19. The totality of space and time, along with all the matter and energy in it
20. A force considerably weaker than the rest, that keeps us from floating into space
21. A bowl-shaped depression caused by a comet or meteorite colliding with the surface of a planet, moon, or asteroid

2. A scientist who studies the universe and the celestial bodies residing in it
3. A collection of stars, gas, and dust bound together by gravity
5. The dwarf planet that used to be considered a planet
6. The second planet in the Solar system
7. An adjective that means “beyond the Earth." used to describe things from space
8. The layer of gases surrounding the surface of a planet, moon, or star
11. The planet closest to the Kuiper belt in the Inner solar system
13. The innermost moon of Jupiter four largest moons
15. The planet in our solar system that has 2 ways of pronouncing it's name because of the rude sounding name
17. The first planet in the Solar system