  In "On the Heavens" Aristotle criticizes the Pythagorean point of view which
claims the existence of a cosmic music and a cosmic sound. According to the
Pythagorean argument, there exists a cosmic music produced by stars and
planets. These celestial bodies generate sound in its movements, and the music
appears due to the cosmic harmony. For Aristotle, there is no sound produced by
celestial bodies. Then, there is no music as well. However, recently, LIGO
(Laser Interferometer Gravitational-Waves Observatory) has detected the
gravitational waves predicted by Einstein. In some sense, a sound originated
from black holes has been heard. That is, Einstein or the General Relativity
and LIGO appear to be with the Pythagoreanism and against the master of the
Lyceum.
