Let's go with an example. Three Planetsplanets, all of roughly earth's size, follow the same orbit around a star with a mass of roughly 1 sun. Basically, all three planets are almost identical to earthEarth, orbiting a star almost identical to our sun, at an orbit almost identical to earth'sEarth's. How plausible is this, and in which ways would the planets interfere with each other, assuming they all orbit with the same velocity?