A potential new dwarf planet has been discovered in the outer reaches of the solar system, and its existence poses the greatest challenge yet to the hypothesis that a ninth planet lurks far from the ...

Despite suggestions the planet could be due to a statistical anomaly and selection bias, the team believes the objects could be moving due to the influence of a large object beyond Neptune's orbit ...

Planet 9 may be closer and easier to find than ... At its surmised brightness and orbit, Planet Nine inconveniently blends into the glittering masses of background stars—a world adrift amid the ...

Caltech astronomer Mike Brown points out the "predicted orbit," in yellow, of the theorized Planet Nine while speaking at Caltech Seismology Lab in Pasadena, California, on January 20, 2016.

Almost a decade after astronomers proposed the existence of Planet 9, an unseen extra planet in the distant reaches of the solar system, they still haven’t all agreed whether it’s real or not ...

Where Is Planet 9? ... it must be big enough that its own gravity has cleared away any other objects of a similar size near its orbit. The third criterion was Pluto’s downfall.

A team of international researchers led by Tomas Stolker in the Netherlands has imaged a young gas giant exoplanet near a 12-million-year-old star. The planet is orbiting a star whose planet formation ...

A team of researchers say they have found the "strongest statistical evidence yet that Planet 9 is really out there", after studying a population of distant, unstable objects that cross Neptune's ...

The timescale in which Planet Nine would render 2017 OF 201 's orbit unstable, and kick it out of the solar system, is in the region of 100 million years. However, the process of placing 2017 OF 201 ...

(Astronomers refer to a planet’s orbit as inclined when it’s not on the same plane as Earth’s.) Caltech. Related article A supernova first seen in 1181 is releasing glowing filaments.