68932 - Re: An interesting aside
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Posted by Samuel A. (Sam) Cox on March 10, 2005 at 08:34:13
(Message posted from "unknown" at 68.45.160.182) - explanation

In Reply to: "An interesting aside" posted by Swing Low on March 09, 2005 at 21:09:10

Very appropriate (and informed) remarks. In fact gravity has been recently tentatively measured as propagating at the speed of light. Newtons concerns about the consequencesw of light propogating at "c" however were not unfounded.

From our frame, observing the universe on 4D particulate event horizons at (probably less) than the Planck length above the cosmic abyss, the speed of gravity is "c".

Since the dark energy unifies the universe and consitutes 73% of its mass, "c" from that frame does not exist as we observe it from ours...therefore the universe is stable.

Einstein himself discussed the fact that an implication of GR is that the speed of light is only constant when the universe was observed from a constant frame. Our frame is ultimate reality to us, but cosmological conditions at all frames taken together give the universe stability...

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