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Why isn’t Pluto a planet anymore?

Brains On! Science podcast for kids

CHAPTER

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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