A massive star may have burst, leaving behind two dense, dead cores, which then collided and caused another explosion ...

Astronomers are reporting a highly complex and potentially groundbreaking cosmic event that may be the first-ever observed "superkilonova," an ultra-powerful explosion produced by two closely timed ...

A strange flash in a distant galaxy first looked like a familiar kind of stellar wreckage, the radioactive afterglow of colliding neutron stars known as a kilonova. Then it brightened again, shifted ...

"We do not know with certainty that we found a superkilonova, but the event nevertheless is eye-opening." When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...