GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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All galaxies appear to be moving further away from one another.
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All stars in the universe are composed of the same kind of gas.
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All objects in the universe are approximately the same age.
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All planets, stars, and galaxies are rotating in the same direction.
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Detailed explanation-1: -The Big Bang Theory proposes that the universe began as a very small and very dense area that expanded rapidly. Which of the following observations about the universe supports the Big Bang Theory? All galaxies appear to be moving further away from one another.
Detailed explanation-2: -This startling idea first appeared in scientific form in 1931, in a paper by Georges Lemaître, a Belgian cosmologist and Catholic priest. The theory, accepted by nearly all astronomers today, was a radical departure from scientific orthodoxy in the 1930s.
Detailed explanation-3: -From the moment of the Big Bang up until about 3, 000 years after (the radiation-dominated era), the density of radiation in the Universe was greater than the density of matter. However, in an expanding Universe, the radiation density falls faster than the matter density and the Universe became matter-dominated.