Galaxies

A new way to gauge the universe’s expansion rate has delivered a confusing result that may conflict with previous related measurements

We now know that the first galaxies in our universe formed shockingly fast, thanks to the latest results from the James Webb Space Telescope

A candidate “rogue” supermassive black hole may weigh as much as 20 million suns and has sparked a trail of star formation that is 200,000 light-years long

The hunt for dark matter is in crisis, and it’s time for radical new ideas to explain our universe

Looming gaps in astronomers’ views of the heavens could undercut the revolutionary potential of NASA’s latest, greatest space telescope

The “absolutely monstrous” cosmic blast is estimated to be a one-in-10,000-year event

Scientists may have spotted two pairs of merging dwarf galaxies, each pair with a duo of soon-to-collide black holes

JWST has discovered giant mature galaxies that seem to have filled the universe shortly after the big bang, and astronomers are puzzled

These merging supermassive black holes are among the closest ever observed and could help unlock deeper secrets of cosmic history

The IceCube observatory has detected neutrinos from an active galaxy for the first time, revealing clues about how supermassive black holes gobble matter

Two giant telescopes—one in Australia, the other in South Africa—will comprise the supersensitive Square Kilometer Array

Researchers are convinced the James Webb Space Telescope has glimpsed an unexpected population of galaxies in the early universe. Now they’re trying to decide what this means for our understanding of the cosmos