In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding?

Explore the unseen wonders of space with these stunning images from NASA’s Hubble Telescope. Witness the majestic spiral arms ...

Astronomers have found more ORCs in the years since those initial discoveries, and some of them also appear to have a galaxy ...

A new analysis of the sky has finally confirmed where the missing half of the Universe's visible matter has been hiding.

Scientists found the universe's missing baryonic matter as invisible hydrogen outside galaxies using a method called 'stacking' ...