Pythagoras_and_Philolaus

    Caption: A woodcut depicting "Pythagoras (c.570--c.495 BCE) and and the Pythagorean Philolaus (c.470--c.385 BCE) experimenting with musical pipes. From Theorica musicae (1492 or 1480?) by Franchinus Gaffurius (1451--1522)." (Slightly edited.)

    Philolaus is the inventor or at least the proponent of the first known Solar System model, the Philolaic system as we call it.

    Credit/Permission: Franchinus Gaffurius (1451--1522), 1492 (or 1480), (uploaded to Wikipedia by User:Singinglemon, 2010) / Public domain.
    Image link: Wikipedia: File:Pythagoras and Philolaus.png.
    Local file: local link: philolaus_pythagoras.html.
    File:
    Ancient Astronomy file: philolaus_pythagoras.html.