The small, icy visitor now racing away from the inner solar system is not just another comet. It is an interstellar object, ...

The most consequential detail about interstellar comet 3I/ATLAS is not that it is rare, but it is doing things that make long ...

3I/ATLAS has passed its closest point to Earth, meaning we will soon lose sight of it for good. Some scientists want to send a spacecraft to chase down the alien comet — or the next interstellar ...

Astronomers have spotted a new comet, moving on a trajectory that indicates that it whizzed into our solar system from interstellar space and is just passing through. It's only the third time ...

If you were wondering whether or not humanity was out of stuff to do, a European spacecraft has touched down on a comet moving as fast as 84,000 miles (135,000 km) per hour. According to the AP’s ...

In late April 2026, a long-period comet will swing through the inner solar system. It will likely be visible with binoculars, ...