# The Senselessness of Pi

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As you can easily imagine, calculating pi to a billion and more and more
digits is completely senseless. In order to determine one's position on
a circle with the radius of earth to a millimeter it's enough to use 10
digits of pi. If the radius is as long as the distance earth - sun you
need 15 digits.

I'd like to draw a better comparison in order to elucidate the incredible
accuracy of 100 digits of pi (which are necessary for admission to our
club):

Imagine a sphere with a radius from earth to sirius (8.7 lightyears).
Fill it up with bacilli such that each cubic millimetre contains 1 trillion
( = 1 000 000 000 000) bacilli. Now string them all to a row so that the
intervall between the first and the second bacillus amounts to the
distance earth - sirius, the same with the second and third bacillus, the
third and fourth, and so on. Take the distance from the first to the last
bacillus as the radius of a sphere. Calculating the circuit of that
sphere by using 100 digits of pi results in an error smaller than a ten
millionth of a millimetre!!!

So why do we need 51 billion digits of pi and more?

*Because pi is most beautifull! Calculating more digits of pi increases
the amount of beauty in the world!*

Friends of Pi
3.14159@astro.univie.ac.at