If "all the planets rotate in the same direction" because they picked up that momentum from the original cloud, then what happened to Venus? Why does it spin the other way?
This theory picks out one radius, where the belt is, as special. I wonder if it can account for the stable orbits of the other planets too. They're oddly regular. I've always wondered if their arrangement is related in any way to the arrangement of electron shells around atoms, which are also very regular becauuse of the electron energy states.