For the unversed, "Planet Nine" is a hypothetical planet which is reportedly larger than Earth that is thought to orbit ...

An international team reported that a new celestial object — perhaps a star, pair of stars or something else entirely — is ...

Earth has a new neighbor that lives far, far away. Scientists from the Institute for Advanced Study's School of Natural ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

Scientists are intrigued after spotting a highly unusual celestial object lurking at the very edge of our solar system. It's ...

The newly discovered object, named 2017 OF201, has a 25,000-year orbit and is believed to be a large contender for dwarf ...

Pluto has become a beloved object in our solar system ever since the International Astronomical Union (IAU) reclassified it from a planet to a dwarf planet back in 2006 – a decision which has ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

"Meanwhile, its perihelion—the closest point on its orbit to the sun—is 44.5 times that of Earth's orbit, similar to Pluto's orbit." This extreme orbit, which takes the object approximately ...

Pluto Retrograde horoscopes are here! Pluto is retrograde from now until October 13, 2025, ushering in changes for each zodiac sign over the next few months. Like most retrogrades, it will have us ...