The citizen’s guide to the future.
A partnership of Slate, the New America Foundation, and Arizona State University.
By Ariel D. Anbar and Dror Ben-Naim
Is Pluto a planet?
It seems like a significant scientific question, especially as the New Horizons spacecraft’s encounter with Pluto this week reminded everyone of the distant, icy world’s demotion in 2006.
But to most scientists, it’s not. In the words of Jim Green, who directs NASA’s planetary science program, “That’s nomenclature. To me, that’s unimportant.”
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