Knifey wrote:
AstroGeek wrote:
But the thing is, time dilation occurs when travelling close to the speed of light in a vacuum. And you can't just go and change that value--it's a physical constant.
So you're saying it has nothing to do with the speed light is traveling at relative to us but we just use the speed of light as a.. measuring stick?
So what if you had an air tight house which was filled with vacuum and a merry-go-round inside the house which could spin near the speed of light. If somebody invented a space suit which could negate all gravitational effects you could go on the merry-go-round and travel to the future yes?
Yes, the speed of light is basically a measuring stick. Also, be careful about how you phrase things when you tall about light moving relative to us--it can open up a huge can of relativistic worms.
Getting on a relativistic merry-go-round would work, although since there is no known way to suppress gravity (well, it would actually be centripetal force in this case) without requiring completely new physics you would get squashed into a puddle. Unless you build a really big merry-go-round so that the centripetal force is reduced to 2 or 3 g's. But for 3g that would have to be 2.8 x 10^12 km in radius. That's on the order of interstellar distances.