Don't Look Now, But We Have 2k Rogue Black Holes Tailing Us!

Does the thought of this kinda give you nightmares?  It should...you know that horrid old gag they still pull in scary movies?  You know, when someone calls on the phone to say the killer is right there in the house!  Well we may have 2 thousand of the worst type of  dealers of death practicably in the same room with us! And are we talking about your average singularity?  nope Galaxy class Black Holes.

How is this possible?  Haven't we been told that when a galaxy starts to form, its the central black hole that is powering the growth, right?  Well yeah, up to a point.  But when galaxies merge, the complex gravitational dance that can eject one of the massive central black holes.

Implausible as that sounds, astronomers have found evidence that in the space just outside the Milky-way of thousands of orphan black holes.


IO9 article

 Credit: Aurore Simonnet/Sonoma State University/NASA.