[MikeD]

Sorry I'm late to the party. Work does that to me...

Anyway, it seems there's some kind of brew-ha-ha about GR and the position of the Sun. A few points to keep in mind:

1. The Sun and the Earth are both moving, roughly in tandem, around the Galactic center, towards Andromeda, towards the Great Attractor, etc.

2. From the Earth's point of view, the Sun is always where it "really" was 8 minutes ago.

3. If gravity moves faster than the speed of light, we have a problem with causality. By definition spacetime moves at speed c. If gravity moved faster, then objects would affect each other without "seeing" each other. That makes no sense.

As for General Relativity, ever measurement from Mercury to stellar occultations to binary neutron stars to rocketed atomic clocks confirms GR exactly.

MD, whose PhD dissertation was about gravitational lensing

[Southack]

"3. If gravity moves faster than the speed of light, we have [our model has] a problem with causality. By [our model's] definition spacetime moves at speed c. If gravity moved faster, then objects [in our model] would affect each other without "seeing" each other. That makes no sense."

Ahhh, much better.

[Southack]

"2. From the Earth's point of view, the Sun is always where it "really" was 8 minutes ago."

And yet, without "seeing" where our Sun is at this very moment in the present, the Earth is nonetheless drawn not to where the Sun was 8.3 minutes ago, but to where the Sun resides at the present moment.

Hmmm...