DIA Study: Warp Drive, Dark Energy, and Manipulation of Extra Dimensions (2010)

Re:DIA Study: Warp Drive, Dark Energy, and Manipulation of E... by hinkley on Monday July 09, 2018 @07:55PM (#17494380)

The thing that always bugged me about time travel fiction is that the reference frame is just assumed to be the surface of the earth. How fast are we wizzing through the universe? Why wouldn’t I reappear somewhere out past Saturn when I travel forward or backward in time?

Similarly, if wormholes are real, and you construct one in a gravity well, what happens to gravity? Especially if both ends are in a gravity well?

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Re:DIA Study: Warp Drive, Dark Energy, and Manipulation of E... by andrewflnr on Monday July 09, 2018 @11:31PM (#17495232)

It seems that the usual thing to do is put the wormhole in orbit around your planet or whatever. That's based more on science fiction than physics, albeit scifi by smart knowledgeable people.

I'm not sure what to think about gravity "reaching through". Gravity and the wormhole are both just curved spacetime. Maybe the larger body distorts the wormhole throat in a way that looks like "reaching through"? Certainly, you need to have some effect that causes energy conservation when you make a perpetual water wheel by suspending one mouth over another and running water through it...

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Re:DIA Study: Warp Drive, Dark Energy, and Manipulation of E... by hossbeast on Monday July 09, 2018 @09:10PM (#17494700)

Does the influence of gravity reach through the wormhole?

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Re:DIA Study: Warp Drive, Dark Energy, and Manipulation of E... by hinkley on Monday July 09, 2018 @09:53PM (#17494871)

If a wormhole is a 'fold' in space, instead of a magic teleportation device, why wouldn't gravity and light and EM fields travel through the wormhole?

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