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New Theories / Do we see the Sun where it was 8.3 minutes ago?
« on: 23/12/2015 17:58:02 »
For years, I've accepted Tom Van Flandern's proof, and others like it, that gravity is billions of times faster than light. That proof is based on the claim that we see the sun where it was, not where it is. I am now having second thoughts.
Of course the Sun is where it was 8 minutes ago, in Solar coordinates. I'm referring to the direction relative to the stars, which goes thru 360° degrees in a year. In 8.3 minutes, the direction of the Sun from Earth changes by .0057°. So do we see the light coming from .0057° east of its current location? If we were moving in a straight line past the Sun, I believe that would be the case.
I have read that a term in general relativity almost exactly cancels the direction change of the light, as if the centers of successive light pulses follow the source.
The direction where we see an expanding spherical shell of light is perpendicular to the surface of the shell as it passes us. If we were in a circular orbit, I think the change in our direction, relative to the stars, would put the Sun's image back where the Sun is. I wonder if this analogy corresponds to the mysterious term in GR.
Our orbit is elliptical, and if I'm right, the angle between where we see the Sun and where it is ought to go thru an annual cycle. Concentric light spheres spreading from the Sun are always tangent to a circular orbit, but only tangent to an elliptical orbit at aphelion and perihelion.
If I now discard the idea that gravity is billions of times faster than light, there will need to be some changes in my model. I still think gravity is faster than light, but I'll have to look for a different proof and a different estimate of cg/cl.
Of course the Sun is where it was 8 minutes ago, in Solar coordinates. I'm referring to the direction relative to the stars, which goes thru 360° degrees in a year. In 8.3 minutes, the direction of the Sun from Earth changes by .0057°. So do we see the light coming from .0057° east of its current location? If we were moving in a straight line past the Sun, I believe that would be the case.
I have read that a term in general relativity almost exactly cancels the direction change of the light, as if the centers of successive light pulses follow the source.
The direction where we see an expanding spherical shell of light is perpendicular to the surface of the shell as it passes us. If we were in a circular orbit, I think the change in our direction, relative to the stars, would put the Sun's image back where the Sun is. I wonder if this analogy corresponds to the mysterious term in GR.
Our orbit is elliptical, and if I'm right, the angle between where we see the Sun and where it is ought to go thru an annual cycle. Concentric light spheres spreading from the Sun are always tangent to a circular orbit, but only tangent to an elliptical orbit at aphelion and perihelion.
If I now discard the idea that gravity is billions of times faster than light, there will need to be some changes in my model. I still think gravity is faster than light, but I'll have to look for a different proof and a different estimate of cg/cl.