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"greywolf42" wrote in message
...

wrote in message
. ..
Could "changes" in gravity travel faster than the speed of light?



Setting:



Our solar system with Sun which is actively fusing hydrogen, a source of
neutrinos.

8000 light years away is a binary star system. One mass is about 50
solar
masses and dense.

The other is 70 solar masses and blue.

These two are in a very tight and very Eccentric orbit with a period of
5.5
years.

In the exact direction of our Sun, these two objects are eclipsing each
other.

Could gravity in our solar system be being varied faster than the
photons
can actually get to our solar system?

With the only detectable effect being a change in the output of our Sun
on
an eleven year period?

Kind of the difference between an s-wave and a p-wave, but the Pressure
wave
being a Tension wave.

If at the big bang "space time", not mass/energy, propagated faster than
light, could "changes" in space time "still" propagate faster than
light?


The speed of gravity could indeed be greater (different) than the speed of
light. Einstein assumed that the speed of gravity was equal to the speed
of
light, when he developed his General Relativity. However, the only direct
measurements of the speed of gravity are the perihelion advances of
orbits.
Mercury in this solar system, and a few stars.

The measurements of Mercury are difficult, primarily due to the
complexities
of a time-varying 9-planet solution (even though only 4 or 5 are important
in the solution), and the uncertainties in the motion of the Earth's
vernal
equinox. (An 'anomalous drift' in the motions of Mercury are actively
removed from the data in the current GR 'verifications.') The solar
system
observations can thus be 'forced' to match GR.

Measurements of simpler binary star systems seem to contradict the
assumption in GR that v_g = c -- implying that the speed of gravity is
greater than (but within a factor of 2 or 3 of) the speed of light. (DI
Herculis, 1985, Guinan and Maloney) You won't see Relativists mentioning
the latter study.

greywolf42
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