March 19, 2016

"When was humanity's calculation of pi accurate enough for NASA?"

kottke.org: In 1424, Persian astronomer and mathematician Jamshid al-Kashi calculated pi to 17 digits. via JPL

'Mathematicians have calculated pi out to more than 13 trillion decimal places, a calculation that took 208 days. NASA's Marc Rayman explains that in order to send out probes and slingshot them accurately throughout the solar system, NASA needs to use only 15 decimal places, or 3.141592653589793.'

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