“The object’s aphelion—the farthest point on the orbit from the sun—is more than 1,600 times that of Earth’s orbit,” Institute for Advanced Study’s Sihao Cheng mentioned in a recent press release. As ...

The Solar System has just gotten a new official member. Currently, with the name of 2017 OF, this is a trans-Neptunian object (TNO). This means that it orbits the Sun further away than Neptune.

A rare discovery beyond Neptune is forcing scientists to rethink early solar system dynamics and the forces that shaped ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. The solar system suddenly has a new member. A new object ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today." When you purchase through links on our site, we may earn an affiliate ...