Codex Harmonicus IV — De Harmonia Mundi

Folio IV of the Codex Harmonicus, a recovered-manuscript-style plate on the music of the spheres — the periods of the wandering stars reduced to musical intervals, and a diagram of the seven heavens drawn as periods, not distances.

What's inside

• A diagram of the seven heavens with their orbital periods, and a table setting each planet's period against a musical interval
• The earth's shadow and the timing of an eclipse, reasoned from three recorded observations
• The size of the heavens reckoned from the width of the earth's shadow at the moon's distance
• A monochord strung to the same ratios as the planetary periods, so the proportions can be heard rather than only read
• Near-consonances among the outer planets, and whether they are by design or coincidence
• Three objections to the doctrine of celestial music, and a short table of where the tables and the sky disagree