Thoughts on Alcubierre Warp Drive Theory

[Bob The Great]

And very recently, IIRC, it has been demonstrated that indeed, Einstein was right, and gravity propagates at c .

Are you refering to this? I've seen a couple of articles questioning Kopeikin's method and results.

Here's one.
Another
And another
And a general article on Space.com

Also, this is not the first experiment to determine the propagation speed of gravity. Several others are outlined on the first link I posted, and of course, in Van Flandern's other papers, here and here.

I'm not saying this proves Kopeikin wrong, but I'm not convinced yet that the issue is settled.

[Durandal]

I think it's a fair bet that gravity does propagate at c. Quantum mechanics predicts the graviton to be a massless particle.

[SPOOFE]

As it is, it seems quite likely that super-luminal travel is out as a means of interstellar flight. Which if you really think about it though is no huge loss, our own solar system has enough space, resources and mysteries to keep humaity fully occupied for a VERY long time.

Now, now... I'm sure that humanity, if it lives long enough (give it a few centuries) will get off its collective ass and start travelling outside the solar system. It'd probably take a couple decades just to get to the nearest star, but hey, we're bound to get bored of this solar system eventually...

[Crossover_Maniac]

And very recently, IIRC, it has been demonstrated that indeed, Einstein was right, and gravity propagates at c .

Are you refering to this? I've seen a couple of articles questioning Kopeikin's method and results.

Here's one.
Another
And another
And a general article on Space.com

Also, this is not the first experiment to determine the propagation speed of gravity. Several others are outlined on the first link I posted, and of course, in Van Flandern's other papers, here and here.

I'm not saying this proves Kopeikin wrong, but I'm not convinced yet that the issue is settled.

I read the article at space.com. The scientists working on string theory would be S.o.o.L. if gravity propagated at exactly c. From what I could tell from the article, they get some wiggle room if it's less than or greater than c but not exactly c.