Black holes are among the most baffling and intriguing cosmic curiosities.

They have such a high density and powerful gravitational pull that not even light can flee from them. It is quite difficult to identify these gluttonous animals, but the Milky Way may contain more than 100 million black holes.

A supermassive black hole known as Sagittarius A* sits in the center of our Milky Way galaxy.

About 26,000 light-years from Earth, this enormous structure has a mass roughly 4 million times that of the sun.