SCIENCE
EARTH SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The galaxies are moving toward each other, and the temperatures are increasing.
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The galaxies are moving away from each other, and the temperatures are increasing.
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The galaxies are moving toward each other, and the temperatures are decreasing.
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The galaxies are moving away from each other, and the temperatures are decreasing.
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Detailed explanation-1: -First scientists theorized that as the universe is expanding and its temperature has gradually decreased. The universe has been expanding since the Big Bang and, as it expands, it’s temperature cooling down. The temperature of the universe can be measured by looking at the cosmic microwave background (CMB ).
Detailed explanation-2: -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).
Detailed explanation-3: -The conundrum is known as the Hubble tension, after astronomer Edwin Hubble. In 1929 he observed that the farther a galaxy is from us, the faster it recedes-an observation that helped pave the way toward our current notion of the universe starting with the big bang and expanding ever since.
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.
Detailed explanation-5: -Fortunately, there is a way to detect the motion of a galaxy: By examining the spectrum of light from a galaxy, you can determine whether the galaxy is moving towards or away from Earth, and how fast.