Originally Posted By: Bill 6
In the MMX the light source is NOT accelerating relatively to the observer!

Then the circular rotation of the earth and its approximately circular orbit around the sun don't produce an accelerated motion. And the experiments operation in the earth's gravitational field didn't cause any relativistic changes.

Originally Posted By: Bill 6
Relativity's 'law' of the constancy and maximum attainable speed of light is a barrier against scientific progress in general and the conquest of space in particular.

Well yes, relativity's law of the constancy and maximum attainable speed of light is indeed a barrier against a lot of things that we wish would happen. Unfortunately, no matter how much we would like to find a way around it so far nobody has found such a way. And wishful thinking doesn't count in science. Unfortunately, we can't just wish away the laws of nature, we have to go ahead and live with them. So buck up and accept the facts, instead of railing against people who point them out to you.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.