Quote Originally Posted by Bonsay View Post
Bah, you're just saying that to appear smarter than me .
I am smarter than you.

Quote Originally Posted by Bonsay View Post
Whats an ergosphere (And does a spinning black hole produce the "torus"/ring shaped singularity?). What's special relativity and why would you travel back in time?
The ergosphere of a spinning black hole is the region of space around the black hole in which frame dragging causes spacetime to move at or above the speed of light, in laymen's terms. A ship in such a region would be traveling backwards in time with respect to flat space.

The singularity of a spinning black hole is a torus in a sense, but you can't picture it.

Special relativity basically says that you can't travel anywhere faster than light would. So if you took a round trip to a star 100 ly away, you can't possibly arrive back on Earth sooner than 200 years after you left. But if, on the way back, you swung around a spinning black hole and traveled a couple hundred years back in time, that would allow you to arrive just after or even before you left. For the sake of continuity, it would make sense to arrive after the time you left.

Quote Originally Posted by nitsuJ View Post
Do you know any ships that travel at the speed of light? No? Then that's why I brought up the speed of sound.
Ships can travel arbitrarily close to the speed of light, and I still don't see what sound has to do with this.

Quote Originally Posted by nitsuJ View Post
According to Einstein's theory, traveling at or faster than the speed of light is impossible because the mass at those speeds would be infinite.

Also, if they traveled at the speed of light, or faster, it'd seem that time reverses.
Your comment about mass is wrong. Momentum approaches infinity, not mass. In classical physics, momentum is just the product of mass and velocity, but in both special relativity and quantum physics, momentum is a fundamental property of an object, just like mass. In fact, the mass of a moving object is invariant, meaning it never changes.

God, I hate having to correct people that haven't taken university courses on relativity, like me.