Space

2. sphere An imaginary rotating sphere where all of the night sky’s objects sit
4. Study of everything within the physical universe.
6. Bang The theory of how the universe began, involving the rapid growth of something small.
9. A configuration of stars that form patters in the sky.
14. Tool used to magnify and view distant objects in space.
15. The star located at the centre of our galaxy, the point that our planets revolve around.
16. A sphere of gas held together by its own gravity, consisting mostly of hydrogen and helium.
19. Way The galaxy that we live in, containing planets such as Earth, Mars, Uranus, etc.

1. Everything, the space in which, matter, energy, planets, life, stars and more exist.
3. Matter Particles that cannot be seen, have no reactivity with light.
5. A large mass that orbits a planet, or other objects that are not stars.
7. Universal force of attraction for all matter.
8. years Unit of distance, measures how far light moves in an Earth year
10. cluster A group of stars that allow astronomers to study the age/evolution of stars.
11. Word used to describe the brightness of stars.
12. hole An area with such intense gravitational pull that even light cannot escape.
13. nova Explosion where a stars outer portion gets blown off.
17. A vast collection of gasses, dust, stars and other interstellar matter gravitationally bound together.
18. (Abbr.) Radiation left after the Big Bang.