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

The object, named 2017 OF201, has a diameter of about 700 kilometers, according to a preliminary study - It is three times as ...

In the news story about Survivor 's upcoming 50th season casting announcement, Cornwall managed to plug the fact that ...

Spotted beyond Neptune, the newly identified object follows an odd path through space, one that complicates a decades-old ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system ...

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

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

For years, astronomers have been questioning whether there is an unseen planet hiding in the furthest reaches of our solar system? Now, a team of scientists from Rice University thinks we may be ...

The object’s aphelion – the farthest point on the orbit from the Sun – is more than 1,600 times that of the Earth’s orbit,” said Sihao Cheng of the Institute for Advanced Study, discussing the ...

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