GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What are two important pieces of evidence we have for the Big Bang?
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Ptolemy’s work on epicycles and Hubble’s law (the expansion of the Universe)
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Doppler Effect (the redshifting of the Universe) and cosmic background radiation
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The fact that we have multiple Universes to compare and study and cosmic background radiation (CBR)
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The abundance of hydrogen, helium, and lithium found in the Universe and Ptolemy’s work on epicycles
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Explanation:
Detailed explanation-1: -Doppler Red-Shift Evidence The Doppler red-shift of light observed from distant stars and galaxies gives evidence that the universe is expanding (moving away from a central point). This allows for Big Bang Theory, because after a “bang” occurs all of the matter moves away from the point of origin.
Detailed explanation-2: -As the universe continued to expand and cool, things began to happen more slowly. It took 380, 000 years for electrons to be trapped in orbits around nuclei, forming the first atoms. These were mainly helium and hydrogen, which are still by far the most abundant elements in the universe.
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