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How many galaxy in the universe?

Updated: 8/17/2019
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12y ago

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Astronomer and science popularizer Carl Sagan used to say that there were "BIL-lions and BIL-lions" of galaxies. Now, thanks to the Hubble Space Telescope's "Deep Field" observations, we know that Sagan was wrong. There are not "billions and billions"; there are "billions OF billions" of other galaxies in the universe.

With every improvement in telescope technology, we can see farther and farther, and still we cannot see any end of it.

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13y ago
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10y ago

Hard to say, since some of them may be so far away their light hasn't had time to reach us yet. However, a guess of a trillion or so wouldn't be far wrong.

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12y ago

The universe is one big galaxy, therefore the answer one galaxy.

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