An object thought to have come from another star has been seen entering the solar system at high speed, and is expected to ...

Researchers from the Nanjing Institute of Geology and Paleontology of the Chinese Academy of Sciences and Columbia University ...

Scientists have proposed an experimental spacecraft that could reach one of the farthest known objects in the solar system in ...

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.

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

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

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.

The monsterous 85-mile-wide comet C/2014 UN271 isn't just the largest icy rock in the Oort Cloud, it's the second most ...