Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

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 ...

The search for life beyond Earth is a holy grail quest for many experts, but finding where to look is a core issue.

Researchers now appreciate that gas planets are more complex than first thought. New findings have implications for our ...

The chance of a planet forming in the outer reaches of the solar system – a hypothetical Planet Nine – could be as high as 40 ...

Researchers found the object named 2017 OF201 while searching for "Planet Nine" - a hypothetical planet thought to exist ...

"The extraordinary results are an essential step toward understanding the initial conditions that lead to the formation of ...

1 of 9 This digital collage brings together our solar system and points beyond in one view. Illustration by NASA/JPL Too small to be called planets, asteroids are rocky chunks that also orbit our ...

The dwarf planet's existence also opens the likelihood of many more like it in our solar system waiting to be found. From our morning news briefing to a weekly Good News Newsletter, get the best ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond Neptune, it orbits the sun every 25,000 years.

Whatever the origin story, TOI-6894b is leading the ranks of other known gas giants orbiting small and faint stars that ...