Astronomers have uncovered what may be the most massive black hole ever found, 36 billion times the mass of our Sun, hidden at the heart of the Cosmic Horseshoe galaxy. Located 5 billion light-years away,

Astronomers have identified an ultramassive black hole that could be the largest ever measured, hidden in a distant galaxy known as the Cosmic Horseshoe. This gargantuan object, weighing about 36 billion Suns, warps space so strongly that light from a background galaxy is bent into a perfect Einstein ring.