GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Scientists have been able to determine that all of the visible mass in the universe is about ____ hydrogen and ____ helium.
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73%, 25%
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25%, 73%
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hot, cool
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50%, 50%
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Explanation:
Detailed explanation-1: -Hydrogen and helium account for nearly all the nuclear matter in today’s universe. This is consistent with the standard or “big bang” model. The process of forming the hydrogen and helium and other trace constituents is often called “big bang nucleosynthesis".
Detailed explanation-2: -Right now, in a 13.8 billion year old Universe, our current visibility limit is 46 billion light-years. Our future visibility limit is approximately 33% greater: 61 billion light-years. There are galaxies out there, right now, whose light is on the way to our eyes, but has not had the opportunity to reach us yet.
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