THE Milky Way could be surrounded by as many as 2,000 rogue black holes ejected into deep space as it formed over billions of years, researchers have revealed.
A team from the University of California, Santa Cruz, ran computer simulations of galaxy formation that show our galaxy may be ringed by the hungry space phenomena.
Their model was based on the theory that every galaxy - no matter how inceptive - forms with a ‘seed’ black hole at its heart.
As these proto-galaxies collide and merge so their central black holes also merge, eventually combining into a supermassive black hole millions of times the mass of our Sun.
However, the collisions between black holes as these incipient galaxies interact creates gravitational waves which are capable of booting a young black hole from its host galaxy. Given this, the UCSC researchers’ computer simulations found that between 70 and 2,000 of these itinerants may now be lingering in the halo of our own galaxy - depending the circumstances of the collisions.  There is general consensus that supermassive black holes exist in the centres of most galaxies. The Milky Way’s is thought to be located at a region known as Sagittarius A* - a bright and very compact astronomical radio source at the centre of the galaxy. A black hole is a region of space-time where gravity prevents anything, including light, from escaping. Around a black hole there is a mathematically defined surface called an event horizon that marks the point of no return.               –MOL