How Many Galaxies Are There in the Universe
"The observable universe contains between 100 billion and 2 trillion galaxies. The exact number depends on what counts as a galaxy—and how deep we look."The Hubble eXtreme Deep Field revealed 5,500 galaxies in a patch of sky the size of a grain of sand held at arm's length. Extrapolating that to the entire sky gave us 100–200 billion. But a 2016 study using computer models pushed that number to 2 trillion, suggesting most galaxies are too faint for us to see. We may only be seeing a small fraction of what exists. If the universe is infinite, the number of galaxies is infinite too. Every new…
The skinny
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