Jawaan!

Hundreds of rogue black holes should be traveling the Milky Way’s outskirts, each containing the mass of 1,000 to 100,000 suns. Avi Loeb -Harvard-Smithsonian Center for Astrophysics New calculations by Ryan O’Leary and Avi Loeb of the Harvard-Smithsonian Center for Astrophysics suggest that hundreds of massive rogue black holes, left over from the galaxy-building days of the early universe, may wander the Milky Way. The Earth appears safe, however, with the closest rogue black hole thousands of light-years away.

Originally posted here: 
Massive Black Holes Roaming Edge of Milky Way -A Galaxy Insight