Ganymede, Europa and Io orbit Jupiter in periods with precise 1:2:4 ratios. Pluto and Uranus have a 2:3 orbital period ratio. A superstitious person might susp

Ganymede, Europa and Io orbit Jupiter in periods with precise 1:2:4 ratios. Pluto and Uranus have a 2:3 orbital period ratio. A superstitious person might suspect there were some cosmic hand tuning the celestial clockwork. Perhaps the motions of the planets has deep resonances with our own lives? You can see why astrology might have some appeal…