Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

As Voyager 1 pushes beyond Pluto, it reveals a shocking truth,the solar system is far vaster and more mysterious than we ever ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...

(Web Desk) - Astronomers have discovered a new world circling the outer edges of our solar system. Researchers using the ...

Astronomers discover Ammonite, a rare icy object beyond Pluto, challenging Planet Nine theory and offering clues to the solar ...

Every once in a while, space gives us something totally unexpected. Well this time, the solar system is surprising us with a ...

Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists — including hints about how the solar system formed.

This won't happen again until 2179.Thursday was a special day for Pluto. On July 12, the dwarf planet crossed the plane of the solar system for only the second time since its discovery. It will be ...

Pluto has some characteristics less like that of a comet and more like much larger planets, according to the first analysis of Pluto’s interaction with the ubiquitous space plasma known as solar wind.

Astronomy Solar System Pluto Pluto: Solar System's Loss is Collectors' Gain News By Robert Z. Pearlman published August 25, 2006 ...