Thursday Throughput: Proxima Cen Edition

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Michael Siegel

Michael Siegel is an astronomer living in Pennsylvania. He is on Twitter, blogs at his own site, and has written a novel.

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2 Responses

  1. Avatar Oscar Gordon
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    says:

    ThTh8: hopefully the new technology opens up a lot more vaccines.Report

  2. Avatar Michael Cain
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    says:

    ThTh9: Didn’t Eratosthenes measure the size rather than the shape? Sagan’s visual aid shows the experiment would work as well with a cylindrical Earth as a sphere. Or a toroid*, depending on what other assumptions you make about what circles what. But by Eratosthenes’s time the spherical shape was generally accepted by the educated folk.

    * Topologists, the people who mistake coffee cups for donuts :^) I really enjoyed topology in graduate school, taught using the Moore Method.Report

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