Big Bang Theory Vocab

3. The totality of all space, time, matter, and energy that exists.
7. The scientific study of everything beyond Earth's atmosphere, including planets, stars, galaxies, and the universe's origin.
8. A theoretical physicist who revolutionized modern physics by developing the theories of special and general relativity.
10. The entire range of all possible frequencies, wavelengths, and photon energies of electromagnetic radiation, extending from low energy radio waves to high energy gamma rays.
14. The ability to do work, cause change, or move matter. measured in joules.
15. An instrument that breaks up a wave into a frequency spectrum.
17. A German-American radio astronomer and physicist.
18. An odorless and invisible element gas found on the periodic table of elements.

1. Fundamentally changed our understanding of the universe by proving the existence of other galaxies and establishing that the universe is expanding.
2. Shorter wavelengths in the light coming from distant celestial objects moving toward the observer.
4. The prevailing cosmological model explaining that the universe began about 13.8 billion years ago from an extremely hot, dense singularity.
5. The lightest, simplest, and most abundant chemical element.
6. The faint, nearly uniform, and isotropic electromagnetic radiation filling all space.
9. The segment of the electromagnetic spectrum, ranging from approximately 380 to 750 nanometers in wavelength.
11. A massive, gravitationally bound system consisting of stars, stellar remnants, interstellar gas, dust, and dark matter.
12. A prominent British astrophysicist and cosmologist.
13. An American radio astronomer.
16. Occurs when light from a distant object is stretched towards longers, redder wavelengths, indicating it is moving away.