Using the European Space Agency’s Euclid space telescope, astronomers have accidentally found a complete Einstein ring around a nearby galaxy known as NGC 6505. This optical effect shows a distorted image of a far-away galaxy as a ring around a separate galaxy in the foreground. NGC 6505’s proximity to Earth and the completeness of its ring make this a rare find.
“An Einstein ring is an example of strong gravitational lensing,” explained study lead Conor O’Riordan of the Max Planck Institute for Astrophysics in Germany. “All strong lenses are special, because they’re so rare, and they’re incredibly useful scientifically. This one is particularly special because it’s so close to Earth and the alignment makes it very beautiful.”