Elon Musk, under the username "Kekius Maximus," has joined William Shatner in advocating for Pluto's reclassification as a ...

The presence of this planet would explain a number of quirks in our Solar System, but there is significant debate in the scientific ... along with dwarf planets like Pluto, moons, and millions of ...

A team of astronomers believes they may have spotted a serious candidate for a ninth planet ... the debate. The Kuiper belt is a region of the Solar System located beyond Neptune's orbit. It is home ...

Planet Nine, also known as Planet X, is a hypothetical celestial object that would distantly orbit our Sun – but there is significant debate in ... dwarf planets like Pluto, moons, and millions ...

This week, an old astronomical controversy is renewed as researchers present new evidence for a hidden "Planet X" in our solar system.

Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

With the demotion of Pluto in 2006, the idea of Planet Nine was first proposed in 2016 by astronomers Batygin and Brown. Its existence is inferred from the unusual orbital clustering of several ...