A novel theory suggests that the current expansion rate of the universe is not fixed, but was in fact quite different in the ...

"Discoveries like this are cosmic archaeology, uncovering rare stellar fossils that preserve the fingerprints of the universe ...

Dimensions beyond the four we’re familiar with could solve a host of problems in physics and cosmology. Columnist Leah Crane ...

The local universe may be expanding more slowly than previously thought, a discovery that could relieve a pesky discrepancy ...

The catastrophic collision of a black hole and a neutron star sent ripples across the universe. New analysis of those ripples ...

A new study explains how some supernovae are particularly dazzling—the glow from a magnetic, spinning ball of neutrons called a magnetar. An assist from Einstein is what settled the case ...

Astronomers have created the largest and most detailed 3D map yet of a glowing signal from the early universe, revealing hidden galaxies and gas from 9-11 billion years ago. By analyzing faint ...

The results reveal that our universe is reverberating with cosmic collisions. Some of the waves stem from pairs of black ...

Light released by a distant star does not simply wink out after crossing some threshold of space. In a vacuum, photons keep ...

Observations show the universe appears flat, yet its true size and global shape beyond the observable horizon may remain forever unknown.