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GONE2UCF
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Time Travel. Is it possible?
GONE2UCF said:Time Travel. Is it possible?
This is not correct. Any differential in spatial motion will result in temporal differences. What you have learned is that significantly and easily measurable differences require large enough variances such as you described.stunner5000pt said:so far I've learned in my special relativity class that you can only slow time down if you travel (which is very difficult) close to the speed of light (within 0.1c and 0.9c)
I disagree. If there is a differential in spatial motion, then two objects have a temporal differential. The object with the greater spatial motion moves more slowly through time. It therefore moves into the future of the other object.Time travel is only possible if you travel faster than the speed of light in which case you have contradictions like
Not possible.lets say your spaceship traveled in a straight line at speed 0.9c and then accelerates to 1.2c
stunner5000pt said:lets say your spaceship traveled in a straight line at speed 0.9c and then accelerates to 1.2c
Let me rephrase what you said:Gonzolo said:Travel to the future is possible and happens all the time for particles, but it would require unheard of amounts of energy to produce the effect for a human. But in principle, you only have to travel extremely fast in any direction and come back.
Prometheus said:Let me rephrase what you said:
Travel to the future is possible and happens all the time. We are always moving into our future. We can also move into the future of people around us, for example. All we have to do is to move with respect to the Earth around us.
Repeating what you said makes no more sense to me than before.Gonzolo said:Not to me. I am not sure what is implied.
I still disagree with it. Why not expand your thinking, to see a wider scope of possibilities? Rather than repeat what you said, why not address what I wrote, as I did for what you wrote? You do not need to agree with me, but repeating something that I challenged will not make the point more surely.I reinstate what I said word for word, adding what's in [] in an attempt to be clearer :
Gonzolo said:But in principle, you only have to travel extremely fast in any direction and come back.
Prometheus said:Let me rephrase what you said:
Travel to the future is possible and happens all the time. We are always moving into our future. We can also move into the future of people around us, for example. All we have to do is to move with respect to the Earth around us.
No astrononaut has ever moved at velocities that are close close to the speed of light. I don't think they've ever moved faster than a few km/s, and the speed of light is 300000 km/s.PIT2 said:Ok this makes sense, some austronauts have been through this effect.
What he said means move at any speed in any direction. Actually you don't have to move at all. As you're sitting on your chair reading this, you're "moving" forward in time. In a second you'll be in the future...PIT2 said:What do u mean "move with respect to the Earth around us"?
Doesnt that mean just travel very fast in any direction?
Fredrik said:No astrononaut has ever moved at velocities that are close close to the speed of light. I don't think they've ever moved faster than a few km/s, and the speed of light is 300000 km/s.
What he said means move at any speed in any direction. Actually you don't have to move at all. As you're sitting on your chair reading this, you're "moving" forward in time. In a second you'll be in the future...
...and now you're there.
Not really. The difference is the word fast. If we move at all with respect to the earth, then there is a time differential with respect to the Earth and all things that are stationary with respect to the earth. There is also a time differential with all things that are moving with respect to the Earth at a rate different than ours.PIT2 said:What do u mean "move with respect to the Earth around us"?
Doesnt that mean just travel very fast in any direction?
Excellent. The difference is that with a differential in spatial motion, it is possible to move into the future at a different rate than another person, and therefore to "move into his future", so to speak.Fredrik said:What he said means move at any speed in any direction. Actually you don't have to move at all. As you're sitting on your chair reading this, you're "moving" forward in time. In a second you'll be in the future...
...and now you're there.
If you define the speed of light in purely spatial terms, as you do, then I agree. However, if we define the speed of light in spatial-temporal terms, then everyone always moves at the exact same speed, the only possible speed, the speed of light.No astrononaut has ever moved at velocities that are close close to the speed of light.
Prometheus said:Excellent. The difference is that with a differential in spatial motion, it is possible to move into the future at a different rate than another person, and therefore to "move into his future", so to speak.
If you define the speed of light in purely spatial terms, as you do, then I agree. However, if we define the speed of light in spatial-temporal terms, then everyone always moves at the exact same speed, the only possible speed, the speed of light.
The concept of time travel has been a popular topic in science fiction, but in reality, it is still considered to be a theoretical concept. There are currently no scientific theories or evidence that support the possibility of time travel.
Several scientific theories, such as Einstein's theory of relativity, suggest that time travel may be possible under certain conditions. However, these theories are still considered to be speculative and have not been proven.
According to currently accepted scientific theories, traveling to the past is considered to be impossible. However, some theories suggest that traveling to the future may be possible through methods such as time dilation or wormholes.
If time travel were possible, it would have significant implications on the timeline and could potentially create paradoxes. For example, the grandfather paradox suggests that if one were to travel back in time and prevent their own birth, it would create a paradox. However, there are various theories that attempt to explain how paradoxes could be avoided.
In order for time travel to become a reality, significant advancements in science, particularly in fields such as quantum mechanics and general relativity, would be necessary. Additionally, the development of technology that could manipulate space-time would also be crucial.