This image from the Hubble Space Telescope shows GAL-CLUS-022058s, a rare galaxy in the Fornax constellation, curving around its spherical companion. The Hubble eXtreme Deep Field (XDF) combines a ...

This month marks three years since the James Webb Space Telescope was first launched, which still feels something like a ...

The universe’s light-starved early epochs, as well as the first stars and galaxies, lie beyond the reach of conventional ...

The Hubble tension is one of the most hotly debated discrepancies in all of astronomy. It centers around a number called the ...

Cosmology is the study of the universe ... the so-called cosmic microwave background.

The James Webb Space Telescope has spotted five galaxy candidates dating to just 200 million years after the Big Bang, making ...

We know roughly when our universe 'exploded' into being. But what existed before that and will it endure forever? Arguing about such mysteries was once purely the preserve of philosophers, but ...

Astronomers can't agree how fast our cosmos is expanding. A new James Webb Space Telescope study has made the crisis even ...

Roughly 400,000 years after the Big Bang, the universe cooled just enough to allow photons to escape from the primordial cosmological soup. Over the next 14 billion years, these ancient photons—the ...

The findings offer a crucial cross-check for previous Hubble Space Telescope measurements of the universe's mysterious ...

Space can be a wondrous place, and we've got the pictures to prove it! Take a look at our favorite space pictures here, and if you're wondering what happened to today in space history don't miss ...