Astronomers at Durham University have uncovered an ultramassive black hole with an astounding mass of approximately 30 billion times that of our Sun. This marks one of the largest black holes ever detected, sitting near the upper limits of theoretical black hole size predictions. The findings were detailed in a paper published in the journal Monthly Notices of the Royal Astronomical Society.

The discovery is particularly exciting because it was achieved using gravitational lensing, a technique that allows scientists to observe distant and inactive black holes. This is the first time a black hole has been identified through this method, offering a new approach to studying these enigmatic cosmic giants.

Gravitational lensing works by observing how light from a background galaxy is bent and magnified as it passes through the gravitational field of a massive foreground galaxy, revealing the presence of hidden black holes. The Durham University team utilized this technique along with supercomputer simulations to confirm the size and properties of the ultramassive black hole. Additionally, data from the Hubble Space Telescope helped solidify their findings.

Ultramassive black holes are rare, typically found at the centers of large galaxies like the Milky Way. While the black hole discovered is inactive—meaning it doesn’t emit radiation—it still holds a massive gravitational pull that distorts space-time around it.

This discovery opens up exciting possibilities for further exploration of ultramassive black holes in the universe. Previously, astronomers could only study active black holes—those pulling in material and emitting radiation. However, inactive black holes have remained largely elusive due to the inability to observe them from great distances. Gravitational lensing now provides a pathway to studying these otherwise unreachable cosmic entities.

The research also suggests that many more ultramassive black holes could be waiting to be discovered, potentially reshaping our understanding of black hole formation and evolution. The findings were supported by the UK Space Agency, the Royal Society, and other key organizations, highlighting the collaborative efforts involved in this groundbreaking discovery.