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Pinned by Xixi Hu into Mind Organization

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Planets are turning out to be so common that to show all

Planets are turning out to be so common that to show all the planets in our galaxy, this chart would have to be nested in itself--with each planet replaced by a copy of the chart--at least three levels deep. This is an exciting time. From XKCD: xkcd.com/1071 Xixi Hu

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