Big Bang Theory vocab

2. The simplest, lightest, and most abundant chemical element in the universe.
4. The scientific study of celestial objects.
5. A pioneering 20th-century American astronomer who revolutionized cosmology by proving the existence of galaxies outside the Milky Way and discovering that the universe is expanding.
10. co-discovered the cosmic microwave background (CMB) radiation in 1964.
13. The remaining thermal after glow from the big bang.
16. A massive, gravitationally bound system consisting of stars, stellar remnants, interstellar gas, dust, and dark matter.
17. The chemical element of atomic number 2, an inert gas which is the lightest member of the noble gas series.
18. German-born theoretical physicist who revolutionized modern science by developing the General and Special Theories of Relativity, fundamentally changing the understanding of space, time, gravity, and the universe.

1. German-American physicist and radio astronomer who co-discovered the cosmic microwave background (CMB) radiation in 1964, providing foundational evidence for the Big Bang theory.
3. British astrophysicist and cosmologist renowned for pioneering the theory of stellar nucleosynthesis.
6. The entire, continuous range of electromagnetic radiation, ordered by frequency, wavelength, or photon energy.
7. The totality of all space, time, matter, and energy.
8. Colored wave lengths the human eye can see.
9. The theory that explains how the universe was created.
11. An apparatus for photographing or otherwise recording spectra.
12. The capacity to do work, cause change, or move matter, measured in joules.
14. An object moving away from the viewer, shifting its spectrum toward longer, redder wavelengths.
15. An object increases in frequency and decreasing in wave length, shifting toward the blue/violet end of the spectrum.