An exploration of Pluto and the controversy surrounding Pluto and its planet status from the renowned astrophysicist at the heart of the controversy.

Pluto in culture -- Pluto in history -- Pluto in science -- Pluto's fall from grace -- Pluto divides the nation -- Pluto's judgment day -- Pluto the dwarf planet -- Pluto in the elementary school classroom -- Plutologue -- Appendix A: Pluto data (2008) -- Appendix B: "Planet X" (complete lyrics by Christine Lavin) -- Appendix C: "I'm your moon" (complete lyrics by Jonathan Coulton) -- Appendix D: "Pluto's not a planet anymore" (complete lyrics by Jeff Mondak and Alex Stangl) -- Appendix E: Official media response from the author regarding the Rose Center's exhibit treatment of Pluto -- Appendix F: Resolution of the International Astronomical Union on the definition of a planet -- Appendix G: New Mexico Legislation relative to Pluto's planetary status -- Appendix H: California legislation relative to Pluto's planetary status.