Now here's an idea for a novel. P.S. Something tells me the writers for Star Trek will totally miss this.
phys.org

Colossal black holes locked in dance at heart of galaxy
Locked in an epic cosmic waltz 9 billion light years away, two supermassive black holes appear to be orbiting around each other every two years. The two giant bodies each have masses that are hundreds of millions of times larger than that of our sun, and the objects are separated by a distance...