0 Question: how many other galaxies do you think exist? Keywords: cosmology Asked by anon-186945 to Miriam on 9 Nov 2018.
Miriam Hogg answered on 9 Nov 2018:
More than we can count! billions of billions. We stared a small patch of sky for a few weeks to get in as much light as possible and found a few thousand galaxies! just in one tiny patch of sky!
https://www.nationalgeographic.com/science/phenomena/2015/04/24/when-hubble-stared-at-nothing-for-100-hours/
The link has a good little explanation of that particular experiment. But if we scaled that up to the whole sky that makes trillions of galaxies
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