The stellar companion may help explain why the brightness of Betelgeuse, the red supergiant, is open to so much variation.

What could we choose as the seven most remarkable celestial objects visible either with our eyes or with a small telescope?

Earth plunged into one of the most extreme climate events in its history. In several stages, the planet became a giant ...

Earlier this year, astronomers reported possible evidence of life on another planet – but new observations from JWST suggest the apparent biosignature isn’t there after all ...