He called this hypothetical world "Planet X." "In some ways, Pluto's more of a planet than some of the other established ...

The major planet roster has changed over the years, but Pluto is still beloved by the science community and regularly makes headlines. In July 2022, the National Aeronautics and Space ...

Discovered in 1930, Pluto was the ninth planet for over 75 years, orbiting at the chilly fringes of our solar neighborhood. But then scientists at the International Astronomical Union decided ...

When we were kids we were taught in school that there were nine planets in our solar system. Then, in 2006, the former ninth planet, Pluto, got demoted to a mere Kuiper Belt object. WTF, dude??? This ...

Not fulfilling the second criteria, Pluto went from being the ninth planet in our solar system to one of five dwarf planets, with the IAU stating that Pluto is "an important proto-type of a new ...