The theory says that there have been a collision between two galaxies and the black holes of these galaxies began to gravitee around each other. The collision of two galaxies is resulting in the formation of a new one
This phenomenon was observed by NASA’s Hubble Space Telescope, and the mass of the black hole is the equivalent of a Billion Suns (the largest cosmic object which leaves its place, noticed so far).
The cause of this event is the gravitational waves, whose existence was first predicted by Albert Einstein – gravitational waves are waves in space resulting from the proximity of two massive objects.
When two black holes collide, gravitational waves cease to be produced, so the new-formed black hole will ‘fly’ in the opposite direction of the strongest gravitational wave, so it will be threw from the center of its galaxy.
Scientists say that this event produced so much energy that it’s force has the equivalent of the explosion of 100 million supernovas exploding at the same time.
Reasearchers team hopes to continue using the Hubble telescope to measure the speed of the black hole, which is currently estimated at 7.5 million kilometers per hour (it can travel the distance between Earth and moon in just 3 minutes).
If it’s real speed is the actual speed , the black hole will leave its Galaxy in about 20 million years.