GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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twice as fast
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twice as slow
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extremely fast
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at the same speed
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Detailed explanation-1: -Hubble’s law, also known as the Hubble–Lemaître law, is the observation in physical cosmology that galaxies are moving away from Earth at speeds proportional to their distance. In other words, the farther they are, the faster they are moving away from Earth.
Detailed explanation-2: -Hubble found that the farther a galaxy is, the faster it appears to be moving away from us. This could be interpreted as the uniform expansion of space. Hubble even said that he studied the galaxies simply as “markers of space.” However he was never fully convinced of the idea of a uniformly expanding universe.
Detailed explanation-3: -By taking the spectrum of a distant object, such as a galaxy, astronomers can see a shift in the lines of its spectrum and from this shift determine its velocity. Putting this velocity into the Hubble equation, they determine the distance.
Detailed explanation-4: -Hubble’s law states that the farther away a galaxy is, the faster it is moving away from us.