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Stephen Colbert and Neil deGrasse Tyson Geek Out Over Pluto at Late Show Mission Control

Following the unprecedented New Horizons fly-by photo of Pluto, Stephen Colbert headed to “Late Show Mission Control” to talk about the never-before-seen celestial body with Hayden Planetarium director, Star Talk host, and all-around space geek Neil deGrasse Tyson. The two have been sparring over the former planet’s status for years, with Tyson in favor of its current dwarf planet classification and Colbert sentimentally disagreeing.

In the video, Colbert defends Pluto, even though it looks like “a malted milk ball left in the rain 4.7 million miles from the sun,” and tries everything he can to get Tyson to agree that Pluto should be a planet—including bribing him with a Klondike bar. It doesn’t work, but the two still seem to have a good time goofing around, discussing outer space, and making fun of Tang.