Time Travel?

After a little chitchat on the mobile, I just want to note something here.

Quote:

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Originally Posted by Izrail

However, even if I am down here on earth smoking my pipe and observing the laser beam is traveling 200 M m/s faster than the rocket, I am simply observing two different (and hypothetically constant) rates of speed. If the beam was moving 300 M m/s away from point of view of the rocket, that would suggest the light is actually traveling at 400 M m/s.

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It is true the above statement is completely wrong. With my little knowledge about light and relativity, I did believe the light was actually traveling at a lesser speed relative to other moving objects. It appears, though, my logical failure attributes not so much to encountering a contradiction, but more so to a miscommunication about traveling distance; it isn't that our model of space and time fails, but that I was failing semantically.

Quote:

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Originally Posted by Xei

Indeed, it is a consequence of the fact that light always travels at the same speed relative to yourself.

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Had I understood what exactly constant meant in this regard, I'd have had nothing to argue. And even after I comprehended, I continued to argue because I was failing to communicate about distance, over and over again. Although, at that point it was irrelevant, all along I meant to say that light would be arriving into future space 200M m/s faster than the rocket.

... Is that statement correct?