Ask HN: Can time travel be possible .... ever?

The theory on time travel is incomplete. We need the unifying theory first if we are to make any assessment about General Relativity's and Special Relativity's projections about inertial frames.

Special Relativity says that the fundamental laws of physics should be the same across inertial frames. I suspect that our next great Physical theory will do to this idea what Relativity did to Newtonian physics. The answer will be, "well, most of the time".

rpedela4• 13 years ago

Hasn't time dilation been verified by experiment?

hacknat4• 13 years ago

Time dilation and time travel are two very different things.

wikiburner2• 13 years ago

Haven't Einstein, Hawking, and others made statements that the only indications that time travel is impossible are the issues of time paradoxes and because we haven't seen any evidence of time travelers? I thought besides those issues, they felt it should be theoretically possible?

hacknat4• 13 years ago

Yes, and 300 years ago there was no Universal speed limit. Hawking has stated that he has no theoretical objections to time travel, but thinks that there is probably a theoretical reason for why it isn't, he just doesn't know what that might be.

Let's not forget, the brightest minds in the world, self admittedly, don't know that much about how the Universe actually works. There are theoretical objections to time travel.

rpedela4• 13 years ago

We already can travel to the future. The faster you move through space, the slower time moves for you. So astronauts have travelled a few nanoseconds into the future because they travel so fast orbiting the earth or going to the moon.

Travelling back in time is another issue. Supposedly time reverses when moving faster than the speed of light, but we don't how to do that.

dragonwriter• 13 years ago

We already can travel to the future.

And we're doing it all the time.

rpedela4• 13 years ago

Yes, I guess that is true. :)

Ask HN: Can time travel be possible .... ever?

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