"They're so rare, and they're incredibly useful scientifically," said Conor O'Riordan of the Max Planck Institute for Astrophysics.

The Einstein ring, formed as light from a distant galaxy bends to glow around another object in the foreground, could help ...

The rarely observed rings are named for mathematician and physicist Albert Einstein. His general theory of relativity predicted that light could bend and brighten around objects across the cosmos.

Euclid’s jaw-dropping capture of the closest Einstein ring ever seen reveals the hidden forces shaping our universe — and ...

A rare ring of light surrounding a galaxy nearly 590 million light-years away from Earth has been discovered by a space ...