A possible cousin of Pluto seems to be circling the far reaches of the solar system. The dwarf planet candidate 2017 OF201 travels in a superwide orbit, with the sun relatively near one end of its ...

The celestial body’s status as the solar system's ninth planet was withdrawn in 2006. Now some experts say we might want to ...

A comet tearing through the inner solar system at roughly 58 kilometers per second formed between 10 and 12 billion years ago ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...

An interstellar comet carries water unlike anything in our solar system, revealing a far colder birthplace and clues about ...

On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...

Humanity has built some incredibly destructive weapons. There are still roughly 12,000 nuclear warheads on Earth today, ...

Astronomers have discovered seeds of rocky planets forming in the gas around the baby sunlike star providing *** peek into the start of our own solar system. The the thing that we've discovered is ...

Astronomers now estimate there is at least one planet for every star in our galaxy. These worlds, called exoplanets, are ...