On July 1 this year, astronomers discovered an object moving through the Solar System at escape velocity, our third interstellar visitor that we know about. The object, dubbed 3I/ATLAS, is now known ...

The earliest images of 3I/ATLAS, newly uncovered by Michigan State University, reveal how the interstellar object evolved as it traveled through our solar system—and how other distant solar systems ...

Astronomers are investigating a potential hidden planet, dubbed Planet Y, far beyond Neptune. Its gravitational pull is ...

The enigma of the intruder about the same size as Manhattan Island is making astronomers rethink what they know about cosmic ...

What makes 3I/ATLAS especially intriguing is that the comet might be three billion years older than our entire Solar System.

After 545 entries from 155 photographers in 35 countries, the winners of this year’s Astrophotography Prize Photographer of ...

Who hasn't looked into the sky and wondered if there's life out there, somewhere, looking back at us? Is it possible there's alien life closer to home — within the bounds of our solar system? The ...

Solar storms can have a devastating effect on earth's power and communication grids, and the trio of missions may help to ...