There Must Be Stellar-Mass Black Holes in our Stellar Neighbourhood. Can We Find Them?
Stellar-mass black holes should be in our neighbourhood within about 50 light years of the Solar System. But they're likely isolated, without much to feed on, making them difficult to find. Gaia found some candidates, but confirming them is tough.
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- There Should Be Black Holes in our Neighbourhood. Can We Find Them? universetoday.com