Neil deGrasse Tyson challenged to debate over Pluto

(Pluto and three of its Moons: Charon, Nix, and Hydra – Photo Credit: NASA)

Alan Stern, the principal investigator of NASA’s $728 million New Horizons mission to Pluto, has challenged famous astrophysicist Neil deGrasse Tyson to a debate over Pluto’s planetary standing.