Time Travel Possibilities: Examining the Physics of Spacetime

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Discussion Overview

The discussion revolves around the possibilities of time travel within the framework of physics, particularly focusing on the implications of spacetime manipulation and the effects of speed on time perception. Participants explore theoretical concepts, hypothetical scenarios, and the nature of time itself.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants reference Michio Kaku's assertion that current physics does not rule out time travel, although it may require extreme energy conditions, such as those produced by a supernova.
  • One participant expresses skepticism about the possibility of returning to the past, suggesting that time is an illusion and questioning the mechanics of such travel.
  • Another participant discusses the relationship between speed and time, noting that traveling at high speeds could result in experiencing time differently, as evidenced by the example of clocks on the International Space Station running slower than those on Earth.
  • A participant argues that one cannot know about distant events until the light from those events has had time to reach them, complicating the notion of instantaneous travel.
  • There is a claim that bending spacetime could allow for travel along a timelike path, potentially enabling backward time travel.
  • One participant challenges the idea that traveling faster equates to faster time travel, stating that increased speed results in less time elapsing for the traveler.

Areas of Agreement / Disagreement

The discussion contains multiple competing views regarding the feasibility of time travel and the nature of time itself. Participants express differing opinions on the implications of speed on time perception and the mechanics of time travel, indicating that there is no consensus on these topics.

Contextual Notes

Participants reference theoretical physics concepts without resolving the underlying assumptions about time and spacetime. The discussion includes speculative ideas about the nature of time and the effects of speed, which remain unresolved.

CosmicCrunch
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Michio Kaku stated that current physics does not rule out the possibility of time travel even tho it would take comprimable measures to achieve it, such as the energy of a supernovae, my question is even if you can bend spacetime to that extreme to get to a planet with life on it, how are you going back in time, being that time is technically an illusion.
 
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I don't think it is possible to go back in time but i know from some theorists that the faster your speed it the faster you travel through time.
our Earth is in a constant faction of time travel because of our constant movement abound the sun and away from center of universe.
Ex: stars closer to the center of universe are going through time slower then we are because of their smaller speeds
also if you take a perfect clock into orbit on the space station after a year of orbiting it will be 6 second behind of another perfect clock back on Earth
I you go at the speed of light to a star 1 light year away you will get there instantly but for everyone on Earth it will seem like one light year. also when you come back instantly the Earth will be 2 light years ahead of you (it will suck everyone will probably be dead)
 
it is also impossible to know about something from a distant place until it has traveled the light year difference in the time continuum unless you are the one traveling the speed of light, but even then, when you return everything would have served out the correct amount of light years needed for light to travel that distance
 
CosmicCrunch said:
Michio Kaku stated that current physics does not rule out the possibility of time travel even tho it would take comprimable measures to achieve it, such as the energy of a supernovae, my question is even if you can bend spacetime to that extreme to get to a planet with life on it, how are you going back in time, being that time is technically an illusion.

The idea is that you can bend spacetime to such an extent thast, rather than traveling along a spatial path, you travel along a timelike path. i.e. you travel backwards in time.
 
lolomolo said:
...the faster your speed it the faster you travel through time.
No. The faster you travel, the less time elapses for you. You could arrive back aty your destination hardly having aged at all.
 

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