[Physicist]

rather snidely, and mostly for the amusement of Physicist

FWIW, I did emit a loud guffaw, at some velocity.

[Southack]

Rather than toy around forever with neither of you agreeing to the pre-conditions in Post #172, let's try a different approach.

One of two things could explain why the orbital planes of our planets are centered upon the Sun's actual location:

1. The Sun and the Earth are actually *not* moving in tandem, but rather, are motionless save for the Earth's orbit around the Sun itself.

or

2. Gravity travels so fast that there is almost no real delay, as in: the Sun hasn't moved very far relative to *anything* by the time Gravity covers the distance in question.

[Old Professer]

If there is a failure in relativity, it surely must lie in the observer, for without him nothing would be.