Moons orbiting the massive planet on the left move faster in their orbits than those
orbiting at the same distance from the less massive planet on the right.
- Blue moons' distances are equal.
- Left planet mass = 2 × right planet mass.
- Red moon's speed and right blue moon's speed are equal. Red
moon's distance = 2 × blue moon's distance.
- Red moon's orbital period is MORE than 2 × (inner left blue
Kepler's 3rd law: P ~ r3/2 (not P ~ r !)