But it's a classification that ... who presented the IAU definition at the Harvard debate. "In my world, Pluto is not a planet." A dwarf planet, according to the IAU definition, is not a type ...

Fifteen years ago, Pluto was kicked out of the planet club ... for a broader definition. The debate over classifying solar system objects reminds me of another classification challenge ...

The probe’s revelations have revived debate about Pluto’s status ... concept that Earth and the other planets were few and special, instead of a better classification that would have ...

Long ago, in the pre-iPhone dark ages of 2006, Pluto was rebranded from its status as a planet and downgraded to dwarf planet classification, changing high school physics class forever.

I blame the Pluto people for that. (This is what a debate among astronomers talking about the term ‘dwarf planets’ was like.) Philip Metzger: We would say that there are a lot of dwarf planets ...

Ever since Pluto lost its standing as a planet in 2006, people have been ­fighting to get it back. Last month, a debate among three experts had some interesting results. Dimitar Sasselov ...

The decision to reinstate Pluto as a planet is not a recent topic of debate, however. There has been much argument over the classification of a planet since the ruling was made by the IAU.