# Why hear numbers in the sky?

**Why did people hear numbers in the sky?**

From Pythagoras to Kepler, the same ratios that make musical intervals were looked for in the planets. The idea shaped astronomy for two thousand years before it faded.

Connects to:
- [Harmony of the spheres](https://mapideas.org/i/mu_kepler)
- [Orbits](https://mapideas.org/i/as_orbits)
- [Ratios](https://mapideas.org/i/mu_ratio)

Sources:
- [Wikipedia: Musica universalis](https://en.wikipedia.org/wiki/Musica_universalis)

Source: https://mapideas.org/i/q_mu_spheres · open on the map: https://mapideas.org/#q_mu_spheres