Cosmology

Scientists have found the best evidence yet for long-predicted “failed galaxies”

Record-breaking objects can tell us about the most powerful events in the cosmos—sometimes

In our topsy-turvy universe, sometimes the farther away an object is, the bigger it seems to be

Theorists have found that a “warm” version of cosmic inflation is consistent with known physics, linking it to the hunt for dark matter

A controversial prediction about black holes and the expansion force of the universe could explain a cosmology mystery

When space itself expands, weird things can happen—like galaxies breaking the universe’s ultimate speed limit

Gauging the mass of a black hole is tricky, but astronomers have devised multiple methods to measure the heft of these galactic gluttons

A swarm of galaxies called the Bullet Cluster is the biggest, best natural laboratory for studying dark matter that astronomers have ever seen

The universe has a habit of disproving “unassailable” facts

This telescope has revealed the whipped-up dust from the birth of a star—and a shining background galaxy—more clearly than ever before

JWST observations of light sources before the first galaxies should have formed are raising new questions about our galactic origins

Scientists are uncovering how spinning black holes launch jets, warp spacetime and shape the cosmos