StarTalk Behind the Scenes

Why Kepler-37b Is a Planet & Pluto Isn't

 

Why is Kepler-37b an exoplanet while Pluto has been demoted to a dwarf planet? It turns out size isn't everything, as astrophysicist Neil deGrasse Tyson explains to co-host Eugene Mirman when he answers a fan's Cosmic Query in this StarTalk Radio "Behind the Scenes" video.

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