The debate over Pluto’s planetary status has been ongoing since its reclassification as a “dwarf planet” in 2006 by the ...

Curious Kids is a series for children of all ages. Have a question you’d like an expert to answer? Send it to . “Comet,” “star” and “planet” are category names that immediately tell ...

At the same time Pluto got demoted, another solar system object was promoted. Ceres, once considered an asteroid, is now classified as a dwarf planet.

Astronomer Dean Regas maps out how kids can teach grown-ups the truth about Pluto and out solar system.

On the 95th anniversary of its discovery, Pluto remains one of the most beloved and enigmatic worlds in our solar system, whether you call it a planet or not.

Pluto hasn't been a planet for almost 20 years. In the early 2000s, scientists discovered several objects of a similar size to Pluto. So, during the summer of 2006, members of the International ...

Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists — including hints about how the solar system formed.

Pluto's status has been a heated debate for decades with arguing over a dwarf planet classification. Here's what international standards say in 2023.

It confirmed the tiny planet harbored an ocean beneath its thick, icy shell. When did Pluto stop being a planet, and why? Pluto was always in a tough spot when it came to being a planet.

Samantha Lawler, Assistant professor, Astronomy, University of Regina "Why does it matter if Pluto is a planet or a dwarf planet? Because for me it just makes it more confusing in our solar system.

The astronomers at Lowell Observatory in Arizona are showing Pluto some love on the 95th anniversary of its discovery, regardless of whether we call it a planet or not.