(October 20, 2015 at 1:10 am)Alex K Wrote: We're talking about ordinary movement through space, no wormholes or exotic warp drives as poroposed by Alcubierre.
My man made a good point the other day. Say you had a wormhole at the bottom of a gravity well and had it re-appearing at the top of the same gravity well, then you passed some water through it that moved a turbine, you would have a perpetual motion machine which is not possible.
So either you need energy in order to sustain the wormhole, or there are some other constraints like not being able to exit a wormhole at a higher point in space-time. If the latter is true then even if you can create a wormhole, you would have long journey back home again. It would be only be useful for non-returnable space probes.
