11 | Mike Brown on Killing Pluto and Replacing It with Planet 9
Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
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Introduction
In 2,000 and six the international astronomical union got together and decided that we would no longer classify pluto as a planet. This issue even made it into an episode of rick and morty, the animated feature. The reason why y pluto had gotten demoted is because it was getting smaller in its orbit around the sun. It's only fairly recently that we discovered that there are a number of objects in the kyperbelt that are comparable in size to pluto. We've known for a long time that pluto is small. Pluto is smaller than earth's moon. But the important thing, upon re lection, is that pluto isn't even the most important
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