Drawing together leading experts from across the field, an international collaboration of cosmologists has created a unified ...

It's 99 percent dark matter, a new study explains.

A tight clump of four star clusters sits in the Perseus galaxy cluster, and at first glance it looks like nothing special. No ...

Using the Hubble Space Telescope, astronomers have discovered what seems to be a galaxy that is the most heavily dominated by ...

In the vast tapestry of the universe, most galaxies shine brightly across cosmic time and space. Yet a rare class of galaxies ...

The Hubble and Chandra space telescopes are hunting for rogue black holes wandering through dwarf galaxies, which could ...

It's well established that the universe is expanding, but there's serious disagreement among scientists over how fast it's happening.

HOUSTON, TX -A seven-year-old girl in Lucknow stood in her backyard at dawn in October 1957, watching Sputnik streak across the sky. Nearly seven decades later, that child would help steer some of ...

It's the final act for a star in the constellation Cygnus, some 1,000 light-years away. But this star is not dying without ...

This phase only lasts a few hundred years.

What looks like a galactic dance is really a cosmic optical illusion—two galaxies, worlds apart, perfectly aligned by chance.

The stunning image captures a star's dying moments wrapped in dust, light, and a cosmic conundrum still waiting to be solved.