how does the astronomical evidence of light spectra, motion of distant galaxies, and composition of matter in the universe support the big bang theory?
The astronomical evidence of light spectra, motion of distant galaxies, and composition of matter in the universe all support the big bang theory. Light spectra from distant galaxies show that the universe is expanding, which is consistent with the idea that the universe began with a single, massive explosion. The motion of distant galaxies also supports the big bang theory, as galaxies are moving away from each other, which is consistent with the idea that the universe began with a single, massive explosion. Finally, the composition of matter in the universe is consistent with the big bang theory, as the universe is composed of hydrogen and helium, which are the two elements that were created in the first few minutes of the big bang.
