[forsnax5]

I always assumed that gravity was an instantaneous thing.

You're in good company. So did Isaac Newton...

[aruanan]

You're in good company. So did Isaac Newton...

I would think that measurements of earth's acceleration toward the sun that show a direction that is 8.3 minutes ahead of the apparent position of the sun in the sky also demonstrate a propagation speed that is virtually (at these distances) instantaneous. That is, the earth is not accelerating toward where "gravity waves" are supposedly reaching the earth together with the photons that left the sun 8.3 minutes previously but toward where the sun actually is.