The Pluto Files: The Rise and Fall of America’s Favorite Planet

In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet, a decision that sparked significant public backlash. Neil deGrasse Tyson utilizes his role as the director of the Hayden Planetarium to document the scientific and cultural history of this transition. He details the discovery of the Kuiper Belt and explains the orbital characteristics that distinguish Pluto from the eight major terrestrial and gas giant planets. The narrative follows the evolution of planetary classification through archival hate mail from schoolchildren, administrative meetings, and orbital mechanics.

This book is intended for enthusiasts of space history and the sociology of science. Readers gain a technical understanding of the criteria for planethood and the logistical reasons why the solar system's layout was redrawn. It provides a look at how scientific consensus shifts in the face of new data and how the public develops emotional attachments to celestial bodies. By the end, the reader understands the physical composition of the outer solar system and the rigid definitions used to categorize the cosmos.

Outward-looking and clear-cut; a moderate read.

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