Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

A new study, however, identifies a possible candidate. A separate team of astronomers compared 1983 data from the Infrared ...

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

An international team used 40 years' worth of data from two space probes to track down what they believe are signs of this ...

The long-theorized Planet 9, which astronomers have speculated could be a Neptune-sized planet that has been lurking on the outer edge of the solar system, could explain the unusual clustering and ...

A new look through decades-old data has unveiled some of the most compelling evidence yet of a hidden ninth planet in the far reaches of our solar system, far beyond ...

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

"The outer solar system is theoretically predicted to harbor an undiscovered planet, often referred to as Planet Nine," the ...