/sci/ - Science & Math

>>5549038

Basically - no object is actually physically moving at FTL speeds. By GR it's impossible for a physical object to go faster than luminescent speeds on its own. And if it did ( like a hypothetical tachyon) it would go back in time. Which is not possible.

Alcubierre works differently, it does not violate GR in a sense that no object is actually physically "moving" but simply space itself. In a more layman perspective, it's more like "riding a wave."

This is nothing new, we are riding one right now, from the Big Bang, space accelerated (expanded) many times the speed of light, however the objects within them did not.

So no, no "Back to Future" time travel here.

>>5406844
http://www.youtube.com/user/okanokumo?v=Zet0Gl-3Egk