GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Scientist know the universe is expanding because most galaxies are showing a red shift which means they are moving further way from one another. If we trace this expansion we would predict that the universe was smaller and denser in the past.
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Scientist know the universe is exploded because most galaxies are showing a blue shift which means they are moving further way from one another.
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Scientist know the universe is expanding because most galaxies are showing a blue shift which means they are moving closer to one another. If we trace this expansion we would predict that the universe was smaller and denser in the past.
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Red shift means that galaxies are moving away from one another.
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Detailed explanation-1: -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: -Key observations supporting the big bang theory include: (1) expansion of the universe, (2) cosmic microwave background radiation, (3) abundances of the lightest chemical elements, and (4) age of the oldest-known stars.
Detailed explanation-3: -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.