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10min chapter
Why isn’t Pluto a planet anymore?
Brains On! Science podcast for kids
The History and Reclassification of Pluto
This chapter discusses the history of Pluto as a planet and the events that led to its reclassification as a dwarf planet. It explores the lack of an official definition for what constitutes a planet and how a group of astronomers established three rules for classification. The chapter concludes with the decision to reclassify Pluto as a dwarf planet due to the presence of other Pluto-sized objects in its orbit.
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