GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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100 billion
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100 million
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1 Billion
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1 Thousand
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Detailed explanation-1: -This tiny patch of sky was full of galaxies, almost 10, 000, of all different sizes and shapes. By multiplying this number by the number of times this tiny patch of sky would fit into the entire sky, astronomers came up with an estimate of between about 100 and 200 billion galaxies.
Detailed explanation-2: -Our most detailed observations of the distant Universe, from the Hubble eXtreme Deep Field, gave us an estimate of 170 billion galaxies. A theoretical calculation from a few years ago-the first to account for galaxies too small, faint, and distant to be seen-put the estimate far higher: at 2 trillion.
Detailed explanation-3: -By examining a very tiny portion of the sky, counting up the number of visible galaxies in the universe in that specific region, and then multiplying that number to account for all the regions of the sky, astronomers estimate the number of galaxies in the universe.