On July 1 this year, astronomers discovered an object moving through the Solar System at escape velocity, our third ...

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

A new image has revealed the clearest glimpse yet of an interstellar visitor zipping through our solar system.Video above: Astronomers discover how planets formThe Hubble Telescope and its Wide Field ...

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 ...

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

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

Voyager 1, launched in 1977, has traveled farther than any spacecraft in human history. After more than four decades of silent endurance through space, it now sails beyond the orbit of the outer ...

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 ...