GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What led Edwin Hubble to conclude that the galaxies are moving apart from each other?
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The shift in absorption lines of the galaxies
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The shirt in absorption lines of Earth
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The shift in absorption lines of just our galaxy
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The shift in absorption lines of Mars
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Explanation:
Detailed explanation-1: -He knew this because the light coming from the galaxies exhibited redshift. Light waves from distant galaxies get stretched by the expansion of the Universe on their way to Earth.
Detailed explanation-2: -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.
Detailed explanation-3: -During his work studying galaxies, Hubble used Cepheid variable stars to measure the distances to a sample of galaxies.
There is 1 question to complete.