A billion light-years from Earth lies one of the universe’s most massive structures, a giant elliptical galaxy surrounded by a sprawling cluster of other galaxies known as Abell 2597. At the core of ...

"To our knowledge, this galaxy-scale quasar-driven wind is currently the earliest one known." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

One of the ways massive stars, those at least 10-times bigger than the Sun, reach their end is in a supernova—an enormous explosion caused by the star’s core running out of fuel. One consequence of a ...