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How Many Galaxies Are There?
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Key Facts In This Video
We can only estimate the number of galaxies inside the bubble that is the observable universe. 00:09
To estimate the number of galaxies in the observable universe, scientists count the stars in a small sample and average the number over 360 degrees. 00:22
There is a rough estimate of as many as 500 billion galaxies in the observable universe. 01:06