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

A thin shell of air wraps around Earth, stretching about 20 miles above the surface. This invisible veil is packed with tiny molecules that sustain life. Just beyond this fragile layer lies the ...

"Cosmic archaeologists" have discovered an iron-deficient second-generation star, which provides evidence of how ancient stars enriched their successors.

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

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to reach somewhere truly empty? Subscribe to our newsletter for the latest sci ...

Despite significant scientific advancement over the last decades, the universe still finds new ways to surprise us. Every ...

The shape of the universe is not something we often think about. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Breaking space news, the latest ...

New 3D map of the early universe from HETDEX reveals faint hydrogen light linking galaxies 9 to 11 billion years ago.

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to reach somewhere truly empty? Our first stop is the International Space ...