"(...) the movement of the stars produces a harmony, i.e. that the sounds they make are concordant, in spite of the grace and originality with which it has been stated, is nevertheless untrue. Some thinkers suppose that the motion of bodies of that size must produce a noise, since on our earth the motion of bodies far inferior in size and in speed of movement has that effect. Also, when the sun and the moon, they say, and all the stars, so great in number and in size, are moving with so rapid a motion, how should they not produce a sound immensely great? Starting from this argument and from the observation that their speeds, as measured by their distances, are in the same ratios as musical concordances, they assert that the sound given forth by the circular movement of the stars is a harmony. Since, however, it appears unaccountable that we should not hear this music, they explain this by saying that the sound is in our ears from the very moment of birth and is thus indistinguishable from its contrary silence, since sound and silence are discriminated by mutual contrast.
"(...) o movimento dos astros produz uma harmonia (...) contudo não ouçamos esta música... o som está em nossos ouvidos desde o próprio momento do nascimento e é assim indescernível do seu contrário, o silêncio, visto que o som e o silêncio são discriminados por contraste mútuo."
http://classics.mit.edu/Aristotle/heavens.2.ii.html
