Source: SFGate
“Europe’s Euclid space telescope has detected a rare halo of bright light around a nearby galaxy, astronomers reported Monday. The halo, known as an Einstein ring, encircles a galaxy 590 million light-years away, considered close by cosmic standards. A light-year is 5.8 trillion miles. Astronomers have known about this galaxy for more than a century and so were surprised when Euclid revealed the bright glowing ring, reported in the journal Astronomy and Astrophysics. An Einstein ring is light from a much more distant galaxy that bends in such a way as to perfectly encircle a closer object, in this case a well-known galaxy in the constellation Draco. The faraway galaxy creating the ring is more than 4 billion light-years away. Gravity distorted the light from this more distant galaxy, thus the name honoring Albert Einstein. The process is known as gravitational lensing.” (02/10/25)
https://www.sfgate.com/news/article/space-telescope-spots-rare-einstein-ring-of-20158450.php