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A comment on Warp Drive May Be More Feasible Than Thought, Scientists Say. Parent comment

Re:Warp Drive May Be More Feasible Than Thought, Scientists Say by nessus42 on Tuesday September 18, 2012 @01:04AM (#4536428)
If you've somehow made A and B closer together, then you've made a wormhole, not a warp drive. Wormholes also come with "closed time-like loops", which allow for time travel.
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Re:Warp Drive May Be More Feasible Than Thought, Scientists Say by spullara on Tuesday September 18, 2012 @01:40AM (#4536533)
I don't know. This isn't something covered by special relativity. You certainly don't need a wormhole though.

http://curious.astro.cornell.edu/question.php?number=575

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Re:Warp Drive May Be More Feasible Than Thought, Scientists Say by nessus42 on Tuesday September 18, 2012 @02:12AM (#4536631)
Yes, there are parts of the universe traveling away from us at faster than the speed of light. In fact, it's quite likely that the universe is infinitely big and an infinitely large part of it is traveling away from us at faster than the speed of light.

This fact, however, does not allow information to be transmitted between two points in space at faster than the speed of light. That's the important constraint here. Causality is only violated when you transmit INFORMATION between TWO POINTS at faster than the speed of light.

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