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Thanks for the FYI. Yes, the sun is moving through space and the light path from the sun to earth is not always a straight line. However, twice a year the light path is straight and one should observe this. In one case the light would be redshifted and in the other it would be blue shifted (moving with and against the translation in space of the earth-sun system). Correspondingly, the gravity vector would show no delay at those points. The yearly variation in the spectra of the sun should yield this data. Perhaps you can find it. I'm very interested and this would go a long way in supporting your argument.

A time delay is related to speed and distance. The further away something is, and the slower something travels, the longer it takes to reach a destination. Light takes 8.3 minutes to reach the Earth from the Sun, for instance, so there will always be a delay of 8.3 minutes as long as the distance from the Earth to the Sun remains constant, regardless of the time of year.

If Gravity traveled at the same slow speed as Light, then it would experience that same delay, again, regardless of the time of year. Moreover, if Gravity was that slow, then planets would orbit around their percieved Sun (67,728 miles off-center-plane from the actual Sun in the case of the Earth, and progressively further off-center-plane for planets in more remote orbits).

That is, if Gravity was as slow as Light.

On the other hand, if Gravity was subtantially faster than Light, then one would expect far less planer orbital deviation from the actual center-plane of the Sun. In fact, one would expect the horizontal-orbiting planets to roughly line up in the same orbital plane as each other.

IF Gravity traveled as slow as Light, then the orbital planes of planets would lag behind the actual position of the Sun because by the time Gravity reached them to tug on them at the old angle, the Sun would have moved. This lag would become more pronounced with the further-away orbital distances of the more remote planets.

For instance: Distance Sun - Jupiter: 5.20 AU => yields 352,185.6 miles off center plane

This is because our Sun is traveling 67,728 miles in the time that it takes Light to travel 1 AU. Thus, by the time Light has traveled 5.20 AU, our Sun has moved 352,185.6 miles in its path around our Galaxy.

Distance Sun - Neptune: 30.0 AU => yields 2,031,840 miles off center plane for the orbit of Neptune.

Of course, in reality we see Earth and Jupiter orbiting in essentially the same center plane, rather than off-center-plane by 67,728 miles for Earth and off-center-plane by 352,185.6 miles for Jupiter. This indicates that Gravity is traveling so much FASTER than Light that the Sun hasn't really moved very much by the time Gravity covers 1 AU, 5.20 AU, and 30 AU respectively.