The Big Bang Theory Vocabulary

2. The small portion of the electromagnetic spectrum that human eyes can see.
5. A massive system of stars, gas, and dust held together by gravity.
9. The entire range of all types of radiation, from long radio waves to short gamma rays.
11. An astronomer who actually preferred a "Steady State" model but ironically coined the term "Big Bang" during a radio broadcast to mock the theory.
12. scientist who accidentally discovered the Cosmic Microwave Background Radiation in 1964 with Robert Wilson, with evidence.
13. The simplest and lightest chemical element, consisting of only one proton and one electron.
15. An American astronomer who, along with Arno Penzias, accidentally discovered the Cosmic Microwave Background radiation in 1964.
17. A pioneering American astronomer who realized and proved that other galaxies are moving away from us.

1. The "afterglow" or faint remnant heat from the Big Bang that fills all of space.
3. A theory that states that the universe was created about 13.8 billion years ago.
4. A scientific instrument used to break light down into its component colors.
6. One of the most influential figures in the history of science, particularly regarding our understanding of the universe he also developed the General Theory of Relativity.
7. The branch of science that studies celestial objects and the physical universe as a whole.
8. The phenomenon where light from distant galaxies shifts toward the longer wavelength end of the spectrum, indicating they are moving away from us.
10. The capacity to do work.
14. All of space, time, matter, and energy that exists.
16. One of the lightest and most abundant element in the universe, formed shortly after the Big Bang.
18. The phenomenon where light shifts toward the shorter wavelength end of the spectrum, indicating an object is moving toward the observer.