>>7756965 Going faster than the maximum speed allowed in the universe is obviously impossible. If there are ways they not involved moving at all.. Just like the space-warping theory. But if we make huge spaceships that can travel 20 - 50% of C then we already have the technical capacity to colonize the entire milky way galaxy and still allow time for complex races to evolve from the colonists before things even start to get a little worse.
You might be able to travel to a point where you experience forces as if the event didn't happen, but when you return to the original location you will find the event has still occurred.
Like, you could hypothetically start at a star just before a supernova, then travel out to a point where, on looking back, you see the star as it was and not as the exploded mess, but if you travel back, even faster than light, the star will still be post nova.
You could take a look at RNS Superstring theory pre GSO projection. That has a tachyon as the NS-sector ground state. If you play around with it you might be able to get some (completely unphysical) quantum equations of motions you could use to examine the hypothetical behavior of a tachyon.
I believe that the only way we could go faster than light is to just pull space around you. therefore, you wouldn't actually be going fast at all. But I wonder what that would look like to an observer...
One thing I never understood about the whole time dilation thing: supposedly if you go on a space trip at near light speed for a while and then come back, you'll have aged slower than everyone back on earth. But what if you have two astronauts in intergalactic space moving away from each other at near light speed. Let's just imagine there's no galaxies around so it's impossible to say whether one astronaut is stationary or moving. They're just moving away from each other. Which astronaut ages slower?
So I just had a thought that made me realize why time dilation exists at all. Everyone is moving through time at light speed. Well, through the time dimension of space-time. So when we move through the space dimensions, some of that velocity gets transferred to our space movement, so we lose some time velocity. So that's why time "moves slower" when you go at a substantial portion to the speed of light.
>>7757591 Basically this. There is even a good analogy for it. If you travel, let's say north with velocity of 60 km/h for 60 min, you will travel 60 km to the north in 60 min. But if you let's say travel to the north-east with the same velocity, your position an hour later won't be 60 km more north than you started but less, since you've also traveled some distance to the east. Sorry for terrible English, I hope you get what I mean.
>>7757886 That would also explain why you can't go faster than light speed because you only have so much time speed to draw from. And the sum total of your speed in space and time is always c. But that still doesn't explain why it takes an infinite amount of energy to accelerate a massive object to c.
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