GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The evidence we have suggests that ____
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the universe has just always existed
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the universe began with a huge explosion
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the universe is shrinking
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the universe started with a singularity and continues to expand
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Explanation:
Detailed explanation-1: -The Big Bang theory says that the universe came into being from a single, unimaginably hot and dense point (aka, a singularity) more than 13 billion years ago. It didn’t occur in an already existing space. Rather, it initiated the expansion-and cooling-of space itself.
Detailed explanation-2: -Evidence that the universe is expanding can be found using the Doppler effect, because distant galaxies have a red shift. Objects that move away emit waves of longer wavelengths, so the light is redder. This means that the galaxies are moving away from each other, which means that the universe is expanding.
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