SCIENCE
EARTH SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It doesn’t support this theory
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Expansion means we probably started from one point
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Contraction means that we will contract again some day
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None of the above
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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: -How does the red shift of distant galaxies support the big bang theory? According to the big bang theory, the universe is expanding. The expansion causes the galaxies to move away from each other. Red shift shows that the galaxies are moving away from each other.
Detailed explanation-3: -Evidence from red-shift This means that the further away the galaxies are, the faster they are moving. This is similar to an explosion, where the bits moving fastest travel furthest from the explosion. Red-shift data provides evidence that the Universe, including space itself, is expanding.
Detailed explanation-4: -Hubble’s law allowed astronomers to calculate how long ago galaxies started moving apart, which provides an estimate of when the Big Bang occurred and how old the Universe is. Hubble initially underestimated distances to these remote galaxies. He calculated that the Universe was about 2 billion years old.
Detailed explanation-5: -Bottom line: A redshift reveals how an object in space (star/planet/galaxy) is moving compared to us. It lets astronomers measure a distance for the most distant (and therefore oldest) objects in our universe.