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Wherever light is from, wherever it's headed, and whether I remain still or zoom away in any direction (towards or away from it), still the light always measures to be moving at 'c' TO ME - AND the same light to someone else moving away from or towards me likewise.

If two objects in space are moving apart and one emits a pulse of light towards the other, then for an outside observer the pulse will take longer to reach the 'other' than if the objects became static (relative to one another) at the instant the pulse was fired. Or you could say: If at the intstant a pulse is fired towards it, the destination object began moving away, then the pulse will take longer to reach it than if it had remained static relative to the source.

This means, from an outside observer’s view, the speed of light must be relative to its source, not destination. Yet, regardless of speed of separation, the destination will (due to time dilation) always register the speed of that light to be the same: 'c' - including light from any other receding or advancing sources in any direction and regardless of their speed.

So if the relative speed of separation of Earth and a remote galaxy, say, is c/2 then will the light we receive be taking twice as long to get here than we think? Of course, again: when that light does get here its speed will measure to be c, as ever, because the rate that time passes is subject to time dilation.

* * * * *


Using the formula:

(this is easy to derive; see: 'time dilation' )

 t’ = t / √ ( 1 - v2/c2 )


If you flew a spaceship from Earth to Alpha Centuri and back for what you judged a couple of years, say, so your normal watch registered a couple of years had passed, and an atomic clock the same, plus it felt like a couple of years, YET when you got back several decades had passed, and people told you that several decades had passed, THEN who/what would you believe? 

Looking at where the trip had taken you, you'd realise the distances for the time you've aged mean you far exceeded c, though no-one observing you from Earth saw that. Moreover, during the trip light would have never seemed to you any different from normal, apart from its wavelength.

You'd say: "...maybe several decades HAVE passed, but that's for YOU, not me. For ME only a few years have passed."

This is the essence of the issue: of people, science, placing themselves at the centre of a situation, reluctant or unable to perceive from another angle.

The reality is, everything in the universe is its own 'centre' and no other entity can impose its circumstances on another as people always like to do and claim ONLY they are right.... when the fact is they are ONLY right for themselves.

I've sent those observations/questions - months ago - to different sites that claim to examine and address these kinds of science questions. But, surprise surprise, there has been no response.

One site did address a question that touches another related contentious issue:

Physics Question:

"Assume two photons are moving in opposite directions from each other from a common light source. How fast would they be traveling relative to each other? Twice the speed of light? If the speed of light is the ultimate speed limit in the universe, how can something travel twice that speed?"

The answer 'proves' that 2c = c..... 

That works for the theory and can be shown to be true experimentally, perhaps? But not when examined deductively. That is, supposing you simultaneously fire two pulses of light in opposite directions at mirrors a certain same distance away and measured how long they each took to receive back - which would be identical - then divide that time by 2 and you'll have the exact time the pulse took from firing to simultaneously hit the mirrors. Divide the distance between the mirrors by that time and you get the 'deduced' relative speed of the two beams. 

I'm not remotely a betting person, but I'd like to have a small bet with the guy who answered that question on 'addition of velocities' of whether my 'fool-proof' deduction procedure, were it carried out, would prove the theory right or wrong.

This is merely another example of how everything in the universe is its own centre that operates in a frame of its own - though is almost 100% shared until relative speeds comparable to the speed of light are involved....  

Just as Einstein noticed what Newton failed to and modified Newton's work - which is still correct for virtually all practical everyday applications - then maybe what Einstein noticed also needs some modifications to account for other discrepancies that seem to appear.... like distant galaxies receding at close to the speed of light (relative to us).