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AMA | October 2023
Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
Planet Nine: A Primordial Black Hole?
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The chapter discusses the hypothetical Planet Nine and whether it could be a primordial black hole. They address concerns about the potential danger of having a planetary mass black hole within 500 astronomical units of the solar system. The speaker explains that if Planet Nine is in orbit, there is no reason for it to go out of orbit, and its mass is not significantly more dangerous than that of a planet.
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