ocr: HELIOCENTRIC WORLD VIEW According to Kepler, the planets' distances from the Sun were such that five regular polyhedrons could be placed between the planets known at his time. Kepler's cosmology contained elements of medieval Christion concepts of the universe and "ythogoreon-Plofonic numerology. For instance, the speeds of the planets were in relation fo the infegral numbers of music and when orbiting the Sun, each of the planets played its own, harmonious music. Eb - atrs URV E A6 a - - - - - - 4 Saturn Jupiter Mars Earth Venus Mercury