Today is March 14 (3/14), which is Pi Day. For those of you who aren’t too mathematical, Pi is 3.14 and the circumference of a circle divided by the diameter. Pi is an irrational number that goes on forever. If you want a few more digits, the folks at piday.org will help you out (1 Million Digits of Pi).
For more about Pi and how it fits into our numbering scheme, see the FAS Astronomers Blog Happy Pi Day and The Hierarchy of Numbers.
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