> Prior to this new finding, all the black holes that have been identified have also had a companion star—they are discovered due to their impact on light emitted by their companion star. Without such a companion star, it would be very difficult to see a black hole.
It seems like we think there's many more of these black holes, but we just can't see them
It seems like we think there's many more of these black holes, but we just can't see them