While mapping the nearby universe, astronomers discovered the largest-known structure in the universe, about 425 million to ...
p><p>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.</p><p>Astronomers have known ...
CAPE CANAVERAL, Fla. (AP) - 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 ...