Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the ...

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

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

In 2006, the International Astronomical Union stopped classifying Pluto as our solar system’s ninth planet and demoted its ...

A legendary actor has taken a surprising turn to the right and is calling on President Trump to make Pluto great again.

For decades, our solar system was thought to have nine planets, with Pluto considered the smallest and farthest. But in 2006, ...

One Pluto year equals 248 Earth years. At 1473 miles in diameter—about half the width of the United States—Pluto is the ...

An international team used 40 years' worth of data from two space probes to track down what they believe are signs of this ...

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

Elon Musk has voiced his support for reinstating Pluto's planetary status, responding to a social media prompt advocating for ...

We all have a room in our minds where the past lives. Some call it memory, others call it baggage. It’s filled with faded ...