Credit due to Alsing once the usual vapid stock phrases directed at me are bypassed,over the years he brought up all the objections possible required to put the partitioning of direct/retrogrades between faster and slower moving planets on to a solid conceptual footing.

Ultimately it is what people gain when they look out at the planets and how they relate to the moving Earth, the central Sun or to each other - an expansive astronomical viewpoint aided by magnification and computer imaging.