Answer fast 3/ a system of billions of stars and all the planets that orbit around them are called? a/ solar system b/ universe c/ galaxy d/ planet 7/ when a galaxy is moving away from the earth the wavelength of light it is giving off is? a/ stretch b/ squeezed together c/ broken up d/ burn out 8/ the conclusion that galaxies that are farthest away move away at the fastest rate known as? a/ the big bang theory b/ hubble’s law c/ the doppler effect d/frequency 9/ the frequency of light waves increases when? a/ wavelengths are bent b/ wavelengths are broken up c/ wavelengths become shorter d/ wavelengths becomes longer 10/ black lines appear on the spectrum of stars when? a/ the star has burnt out b/ elements have emitted wavelengths of light c/ elements are missing from the star d/ elements have absorbed wavelengths of light 11/ all stars primarily contain? a/ hydrogen and helium b/ iron c/ carbon d/ oxygen