A European space telescope launched to explore the dark universe has released a trove of new data on distant galaxies.

The DESI experiment shocked cosmologists with a hint that dark energy varies over time. Now, with more data, the conclusions hold up.

As Venus approaches its inferior conjunction, astrophotographers have snapped some striking shots of the crescent planet ...

A quartet of small, rocky exoplanets likely circle Barnard's Star, around 6 billion light-years from Earth, putting them in ...