GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Massive black holes are drawing galaxies away from Earth.
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The Sun and Earth are located at the center of the universe.
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Everything in the universe is moving the same direction.
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The once-smaller universe is expanding in all directions.
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Detailed explanation-1: -What can we conclude from the observation that nearly all galaxies are moving away from us? Massive black holes are drawing galaxies away from Earth.
Detailed explanation-2: -There is a phenomenon called as the redshift. Redshift happens when galaxies move away from each other, their light is more towards the red side on the visible spectrum. This redshift has been recorded when studying the position of different galaxies, and each time the redshift is observed to be even farther away.
Detailed explanation-3: -When scientists talk about the expanding universe, they mean that it has been growing ever since its beginning with the Big Bang. The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest.
Detailed explanation-4: -In 1929, Edwin Hubble provided the first observational evidence for the universe having a finite age. Using the largest telescope of the time, he discovered that the more distant a galaxy is from us, the faster it appears to be receding into space. This means that the universe is expanding uniformly in all directions.