In an amazing new discovery, scientists think they may have found a mid-sized black hole that is a 100,000 times more massive than our sun in the Milky Way. Astronomers in Japan analyzed data while examining a cloud of molecular gas near the galaxy’s center and found evidence consistent with a black hole.

They studied the cloud and determined that the gas was moving at greatly different speeds, and a clump of gas toward the center of the cloud appeared to be warped by gravitational forces of a massive scale. The findings were published in the journal Nature Astronomy.

They also discovered a source of radio waves that resembles Sagittarius A, which is the massive black hole at the center of the Milky Way. Researchers think it may have formed after a dwarf galaxy was pulled into the Milky Way, and the discovery could prove that galaxies grow by snatching up their neighbors.