Kepler divides The Harmony of the World into five long chapters: The first is on regular polygons; the second is on the congruence of figures; the third is on the origin of harmonic proportions in music; the fourth is on harmonic configurations in astrology; and the fifth on the harmony of the motions of the planets.
Kepler opdelte Harmonices Mundi i fem lange kapitler: det første handlede om regulære polygoner; det andet om figurers kongruens; det tredje om oprindelsen af harmoniske proportioner i musik; det fjerde om harmoniske konfigurationer i astrologi; og det femte om harmonien i planeternes bevægelse.