Astronomers unveil record-breaking ultramassive black holes.

Astronomers have discovered an ultramassive black hole, over 30 billion times the mass of the Sun, using gravitational lensing and supercomputer simulations. The technique allowed the researchers to accurately predict the light's path as seen in real Hubble Space Telescope images. This is the first black hole found using gravitational lensing, and the approach could let astronomers discover far more inactive and ultramassive black holes than previously thought. The research was supported by the UK Space Agency, the Royal Society, the Science and Technology Facilities Council (STFC), and the European Research Council.