Timeline for How can a twin on Earth grow old slower than his/her twin sibling?
Current License: CC BY-SA 4.0
16 events
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| Jun 16, 2020 at 11:03 | history | edited | CommunityBot |
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| Jul 29, 2019 at 18:06 | comment | added | Ash | @Renan Assuming instantaneous travel from our world to somewhere else if the twin who leaves spends longer gone than the twin that stays spends still on Earth, for whatever reason, then the stay at home will be older when the traveler returns. I present two options: First that the return trip takes less than zero time, ending before it starts, theoretically possible with a wormhole. Second that the traveler ends up somewhere with a vastly different time flow in a way similar to the tales of faerie. | |
| Jul 25, 2019 at 21:55 | comment | added | Renan | I'm not opposed to your answer or to adding to Ash's answer. I'm curious about how it would work. | |
| Jul 24, 2019 at 23:53 | comment | added | Hypnosifl | I thought of a way to do it with a two-way trip through a wormhole where one of the wormhole's two mouths stays on Earth and the other is in some distant location, and it gets accelerated between the twin's trips through it--Renan and Ash, do you think I should try to explain in the comments and maybe Ash could then add it to this answer in their own words, or should I do my own separate answer with details? | |
| Jul 24, 2019 at 7:00 | comment | added | Hypnosifl | But it might be that this type of solution would always violate causality. Say the twin that leaves Earth travels to a planet 100 light years away at very close to light speed, so he experiences a short journey due to time dilation, but in Earth's reference frame it takes them just over 100 years. Then he lives on that planet 60 years, and jumps through a wormhole back to Earth which in the Earth frame takes him back in time 160 years, so the older version arrives on Earth just after he left...now if he sends a message at light speed to the planet, his younger self can get a message from him. | |
| Jul 23, 2019 at 23:40 | comment | added | Hypnosifl | Maybe @CarlWitthoft was responding to my comment about where a traveler "enters a wormhole and then exits the other side many years later from the perspective of the twin on Earth"--if so it's true I messed up there, this wouldn't match the scenario in the OP where it's the traveling twin who's supposed to age more. But that probably wasn't what you (Ash) were imagining--you could have a scenario where a traveler goes to some distant region of space, spends years there, then pops back through a wormhole which returns them to Earth shortly after they left. | |
| S Jul 23, 2019 at 19:23 | history | edited | Ash | CC BY-SA 4.0 |
Fixed grammar
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| S Jul 23, 2019 at 19:23 | history | suggested | MrSpudtastic | CC BY-SA 4.0 |
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| Jul 23, 2019 at 19:22 | review | Suggested edits | |||
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| Jul 23, 2019 at 19:11 | history | edited | Ash | CC BY-SA 4.0 |
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| Jul 23, 2019 at 19:06 | comment | added | Ash | @CarlWitthoft How so? The traveler in all these cases experiences significantly more time while he is away than the stay home twin experiences while he's gone. | |
| Jul 23, 2019 at 19:01 | comment | added | Ash | @Hypnosifl Thanks, I hadn't realised that the bridge was no linger a catch all phrase for wormholes in general. | |
| Jul 23, 2019 at 19:00 | history | edited | Ash | CC BY-SA 4.0 |
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| Jul 23, 2019 at 18:59 | comment | added | Carl Witthoft | This still ages teh Earth twin, not the traveller | |
| Jul 23, 2019 at 18:46 | comment | added | Hypnosifl | An Einstein-Rosen bridge is not actually traversable, you'd need a traversable wormhole held open by exotic matter for it to work, but as you say that would allow for a story where one twin enters the wormhole and then exits the other side many years later from the perspective of the twin on Earth, but with the trip through the wormhole having been nearly instantaneous from the perspective of the twin who went through. | |
| Jul 23, 2019 at 18:33 | history | answered | Ash | CC BY-SA 4.0 |