2 ms·
I'd say define a "cycle" as greatest common divisor of all planets' rotation periods. Make it an equivalent of "solar system day/hour" or something.
by d_silin 6y ago
I'd say define a "cycle" as greatest common divisor of all planets' rotation periods. Make it an equivalent of "solar system day/hour" or something.
- DavidSJ 6y agoThe problem is these orbital periods are generally not rational multiples of each other, so their GCD is undefined (or 0, in a sense). Some exceptions to this exist due to orbital resonance: Pluto and Neptune are in 2:3 resonance, and in the Jovian system Ganymede, Europa, and Io are in 1:2:4 resonance.