Astronomers recently discovered a black hole that is 36 billion times the size of the sun.

The black hole resides in the Cosmic Horseshoe, a system of two galaxies located inside the constellation Leo. The forefront galaxy—LRG-357—is encircled by a halo of light called an Einstein Ring, which forms when light from one galaxy is warped and magnified by the gravity of the galaxy in front of it.

Since the Cosmic Horsehoe’s discovery in 2007, scientists have searched for the source of LRG-357’s gravitational pull. New research has answered this question: a supermassive black hole sits at the center of the galaxy.

According to Einstein’s theory of relativity, huge objects in space warp the fabric of the universe, called space-time. Essentially, gravity is not an invisible force but space-time being warped by heavy objects.

Researchers drew their new conclusion by analyzing data collected from the Spectroscopic Explorer spectrograph in Chile’s Atacama Desert as well as the Hubble telescope. They analyzed the gravitational pull of LRG-357 and concluded that there must in fact be a black hole at the center of the galaxy.

The LRG-357 black hole is among the largest black holes to ever be discovered.