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

Scientists have issued a concerning update on a mystery interstellar object travelling through our solar system.

Using data from the Vera C Rubin Observatory, experts have revealed just how big the object, dubbed 3I/ATLAS, really is.

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 ...