Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

New research says that Earth could be ejected from our solar system if a passing star was to come close enough.

For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar ...

Recent observations have revealed carbon monoxide venting from the largest comet ever seen, providing clues about its origins ...

And Back - The Super Soldiers Defending the Kuiper Belt On April 7, 2016, the team running NASA’s New Horizons mission were waiting nervously. The spacecraft was about to enter the outermost reaches ...

The Solar System seems calm, but that tranquility is fragile. Now imagine one day looking up and spotting something unfamiliar in the sky. A tiny speck grows larger until it becomes clear, a planet ...

It poses no threat to Earth, but this comet, called C/2014 UN271 (Bernardinelli-Bernstein), has enraptured astronomers ever ...

The sun rises from the east, and sets in the west - this is a well-established fact for the longest time, and this is due to ...

Solar System Planets. Astronomy articles on the eight planets, plus the two dwarf planets, Pluto and Eris. Great pictures of everything in the solar system. Updated daily.