Millions of Black Holes Are Hiding in Our Galaxy. Here’s How Astronomers Plan to Find Them.

By Rafi Letzter It’s time to find all the missing black holes. That’s the argument advanced by a pair of Japanese astrophysicists, who wrote a paper proposing a new search for millions of “isolated black holes” (IBHs) that likely populate our galaxy. These black holes, lost in the darkness, sip matter from the interstellar medium …