Astronomers have spotted a giant galaxy with a massive star-forming ring that existed 10.8 billion years ago. An artist’s impression of the collisional ring galaxy R5519. Image credit: James Josephides, Swinburne Astronomy Productions. Dubbed R5519, the ring galaxy was discovered in the systematic search for extremely distant spiral galaxies in the Cosmic Evolution Survey (COSMOS) field of the FourStar Galaxy Evolution Survey (ZFOURGE). Compared...
