After other similar objects were found far away, Pluto was reclassified as a dwarf planet. Photo Credit: NASA Pluto is small- about 1,400 miles wide- and very cold, too cold for life.

Almost 20 years after Pluto was infamously downgraded from its status as a planet, scientists now believe they have ...

Elon Musk, under the username "Kekius Maximus," has joined William Shatner in advocating for Pluto's reclassification as a planet. Shatner playfully suggested Musk persuade the President via ...

The first observations of Pluto by NASA's James Webb Space Telescope (JWST) reveal dramatic phenomena on its surface, like ...

Pluto has never been much of a planet — small, wired orbit, not much atmosphere — and questions about its status have been raised periodically since its discovery 76 years ago. This week ...

Renowned astrophysicist Neil deGrasse Tyson has inspired many with his insights into the universe. For those looking to ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

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

But why do Pluto and its fellow dwarf planets not enjoy the same status as the solar system’s eight regular planets? To officially be considered a planet, an object must follow three rules set by the ...