But why isn't Pluto considered a planet anymore ... is not the gravitationally dominant object in its neighborhood — and thus, not a planet, according to the new definition.

In the time Pluto was found, classified as a planet and reclassified as a dwarf planet, it has not completed one orbit. One year on the distant ice planet is 248 Earth years, and one day is 153 ...

Although Pluto's orbit was more elongated than the other planets' (and even crossed the orbit of Neptune—not the kind of thing you would expect a decent planet to do), it seemed alone in its ...

No longer a planet and no longer a misfit, Pluto isn’t even one of a kind anymore. It’s one of thousands of worlds populating the Kuiper belt—a vast debris ring beyond Neptune that’s home ...

"Get over it. It's done. Just get over it." The StarTalk Radio host explains why it makes perfect sense to classify Pluto as a dwarf planet. Produced by Kamelia Angelova, Will Wei, & Alana ...

was demoted to dwarf planet status in 2006 by astronomers—not planetary scientists. The flyby of New Horizons nine years later revealed Pluto to be geologically active and complex, with nitrogen ...