Hayden Planetarium director Neil Tyson explains why Pluto is no longer considered to be a planet.

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ID: ARGZ6LWJH4

Media Specs: 720x480 | 4:3 | 29.97 fps | NTSC

Date: 2002-02-23

Description: Hayden Planetarium director Neil Tyson explains why Pluto is no longer considered to be a planet.

pluto planets neil-tyson american-museum-of-natural-history controversies science astronomy directors astrophysicists planetariums museums downgrading removing interviews new-york-city new-york 2002-02-23 african-americans

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