"When a structure forms--like the galaxy or the solar system, the total motions of all the accreting stuff has a net angular momentum vector. Bodies moving with a different angular momentum vector are preferentially ejected from the forming system, leaving--eventually--only bodies with the same vector as the ensemble of the original cloud or mass. These bodies orbit in a plane precisely normal to that vector. End of story."
That's all true, but irrelevant to the discussion of the speed of Gravity.
The planets in our Solar System do not orbit around the point where the Sun was located 8, 30, 90, 120, or 1200 minutes ago. Instead, they rotate around the point where the Sun is located at this very moment.
That is very different from what we see. Because it takes light 8.3 minutes to travel from the Sun to the Earth, we here on Earth see the Sun in its position from 8.3 minutes ago.
What one thing can explain why our planets' orbits are around a point different from where we see the Sun?
Could it be that Light and Gravity propogate at different speeds?
5 Legislative Days Left Until The AWB Expires
"Could it be that Light and Gravity propogate at different speeds?" No. GR tells us that the "couple" that you think would disrupt the Solar System by generating extra momentum for each planet is precisely cancelled out by gravity waves eminating from the N-body (or 2-body, if you consider only each planet and the Sun) system.
Also, my dictionary advises me not to take scientific advise from someone who cannot spell "propagate" correctly.
--Boris