vocabulary

1. radiation left over from the big bang
4. a person who played a big role in helping to prove that the universe is constantly expanding
5. the thing that holds all of the existing known matter
6. a scale of how much light the human eye can see
7. the branch of science that deals with space
9. a man who developed the theory of relativity
11. one of the first elements formed and is used to generate electricity
13. light shifts in different diretions as galaxies move
15. two men who discovered cmb while working on a radio

2. a theory that the universe is constantly expanding
3. splits light from something in space so that the wavelength can be recorded
8. the range of frequencies of electromagnetic radiation
10. what is needed to do work
11. one of the first elements formed and people use it to make balloons float
12. a system of stars and planets help together by gravity
14. a man who denied the big bang theory and instead promote the theory of stellar nucleosynthesis