Hope for Pluto—Should We Re-Redefine Planets?

From Planetary Radio: Space Exploration, Astronomy and Science The Planetary Society

Planetary geologist Kirby Runyon is lead author of an abstract that proposes a new, geophysical definition of what a planet is.Learn more about your ad choices. Visit megaphone.fm/adchoices

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Hope for Pluto—Should We Re-Redefine Planets?

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