Frankly, we don’t keep up much with Pluto and its status as a planet or non-planet. It’s kind of like when, as a young altar boy, the Catholic Church demoted a bunch of saints. We just rolled with the ...

Once the quirky underdog of our solar system, Pluto held planetary status until 2006, when it got a cosmic demotion that still stings space fans. Discovered in 1930, Pluto was the ninth planet for ...

Pluto was reclassified as a dwarf planet in 2006 when the IAU redefined what it means to be a planet, declaring that a planet must be a celestial body that orbits the sun, is round or nearly round and ...

Pluto's days, though they drag on a bit at around 153 hours, are nothing compared to its years. Pluto's orbit takes 248 Earth ...

A recent research paper suggests that a planet may exist far beyond Neptune — less than 20 years after the previous ninth planet, Pluto, was demoted. That research paper, accepted last month for ...

Pluto may be a “dwarf” planet, but it is still a planet. In 2006, the International Astronomical Union, responding to the discovery of several Pluto-like objects in the Kuiper Belt beyond Neptune, ...