Einstein ring

An Einstein ring is created when light from a galaxy or star passes by a massive object en route to the Earth. Due to gravitational lensing, the light is distorted, making it seem to come from different places. If source, lens, and observer are all in perfect alignment, the light appears as a ring.

News

 * Hubble finds molten Einstein Ring 60 million light-years away
 * JWST discovers the farthest gravitational lens ever