Space

3. Universal force of attraction for all matter.
4. A group of stars that allow astronomers to study the age/evolution of stars.
6. An imaginary rotating sphere where all of the night sky’s objects sit
9. An area with such intense gravitational pull that even light cannot escape.
12. A configuration of stars that form patters in the sky.
16. A sphere of gas held together by its own gravity, consisting mostly of hydrogen and helium.
18. Everything, the space in which, matter, energy, planets, life, stars and more exist.
19. Study of everything within the physical universe.

1. Unit of distance, measures how far light moves in an Earth year
2. Particles that cannot be seen, have no reactivity with light.
5. The theory of how the universe began, involving the rapid growth of something small.
7. A large mass that orbits a planet, or other objects that are not stars.
8. The galaxy that we live in, containing planets such as Earth, Mars, Uranus, etc.
10. (Abbr.) Radiation left after the Big Bang.
11. Word used to describe the brightness of stars.
13. Tool used to magnify and view distant objects in space.
14. Explosion where a stars outer portion gets blown off.
15. The star located at the centre of our galaxy, the point that our planets revolve around.
17. A vast collection of gasses, dust, stars and other interstellar matter gravitationally bound together.