Aboard this planet, it takes 365.25 days to complete a lap around the sun. Saturn takes 10,755 days to do the same. On Mercury, the trip only takes 88 days. In 1619 the German astronomer Johannes Kepler published *The Harmony of the World*, in which he famously observed the orbits of each planet in our solar system and transformed them into musical terms.

When it comes to planetary orbits, we really are taking these facts on faith. Maybe Kepler understood this, and so he strove with his solar symphony to transform the planets' frequencies into a medium where we experience frequency directly, every day of our lives. That is, sound.

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