  In 2006, a final result of a measurement of the gravitational constant $G$
performed by researchers at the University of Z\"urich was published. A value
of $G=6.674\,252(122)\times
10^{-11}\,\mbox{m}^3\,\mbox{kg}^{-1}\,\mbox{s}^{-2}$ was obtained after an
experimental effort that lasted over one decade. Here, we briefly summarize the
measurement and discuss the strengths and weaknesses of this approach.
