How many black holes are there in the universe? – Space.com

Paul M. Sutter
is an astrophysicist atSUNY
Stony Brook and the Flatiron Institute, host of “Ask a Spaceman
” and “Space Radio
,” and author of “How to Die in Space
.” Sutter contributed this article to Space.com’s Expert Voices: Op-Ed & Insights
.
Black…

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