Siraj’s Planet Y search started about a year ago when he was trying to find out whether the shape of the Kuiper Belt is flat. “The planets of the solar system have slight tilts up and down, but ...

In a gigantic "screw you" to Pluto, the ex-planet now demoted to minor planet, we could be on the cusp of locating Planet Nine – if it actually exists, that is. Planet discovery isn't as simple as ...

A newly discovered warp in the outer Solar System may have been created by a small, rocky world, much closer to the Sun than ...

dubbed "Planet Y," could be around the same size as Earth and may exist alongside another popular Planet Nine candidate — potentially bringing our cosmic neighborhood's planetary tally to 10, if both ...

Researchers at the California Institute of Technology (Caltech) have found new evidence that further suggests there is a ninth planet in our solar system. Nicknamed "Planet Nine," researchers said ...

The mysterious Planet Nine may have up to 20 moons that could be superheated by the hypothetical planet's gravitational pull, making them easy to spot. When you purchase through links on our site, we ...

The researchers who originally proposed the Planet Nine hypothesis have narrowed down where the giant elusive world might be hiding, after carrying out an exhaustive sweep of the theoretical planet's ...

Astronomers Brown and Batygin have presented accumulating evidence supporting the existence of Planet Nine, a hypothesized planet in our solar system, based on the unusual orbital characteristics of ...

Astronomers have been scouring the outer solar system for signs of a hypothetical ninth planet for almost a decade, without success. However, we may finally be on the cusp of finding it, experts say.

For many years, there have been theories circulating about Planet Nine, a mysterious planet that orbits the Sun once every 10,000 or 20,000 years, and now physicists are suggesting it may not even be ...

Planet Nine, the undiscovered planet at the edge of the solar system that was predicted by the work of Caltech’s Konstantin Batygin and Mike Brown in January 2016, appears to be responsible for the ...

Does Earth’s solar system host eight planets — or nine? The answer depends on who you ask. Ever since Pluto got demoted as a planet, a group of scientists still believe there is a ninth planet out ...