4 ms·
These sort of arguments seem to solidify the notion that time-travel is not possible in the current setup of the universe.
by kumarvvr 9y ago
These sort of arguments seem to solidify the notion that time-travel is not possible in the current setup of the universe.
- baldfat 9y agoTime traveling backwards is not possible. Time Traveling forward happens the faster you move. Satellites have to compensate for the fact that time is different the faster you go.
- cowmoo728 9y agoI think it's "time traveling forwards happens slower the faster you move." The easy explanation is that we're traveling in a 4 dimensional space at the speed of light, and any increase in speed in the 3 spatial dimensions must subtract from your speed in the orthogonal time dimension.
- dvdkhlng 9y agoMaybe in an Orthogonal Universe [1,2], but not in ours :) The way you state it, traveler's time would speed up (as the resting frame's time of journey would be decreased). [1] http://www.gregegan.net/ORTHOGONAL/00/PM.html http://www.gregegan.net/ORTHOGONAL/00/PM.html [2] http://www.gregegan.net/ORTHOGONAL/02/Motion.html#LR http://www.gregegan.net/ORTHOGONAL/02/Motion.html#LR
- baldfat 9y agoIf I jump on a ship and travel near light speed (Not possible yet) and then land on the same spot I would not have spent the same time as those on the earth. Now at a tiny level anyone ever on an airplane also will have spent less time than those who never have flown.
- kumarvvr 9y agoI have always wondered, when satellites have to have their clocks compensated, is it that they are experiencing time differently, but are still in present time? To rephrase it, how does one know they are not in "now" but the past? apart from maybe measuring ages of their counterparts etc.
- yiyus 9y agoTime-travel is absolutely possible, as long as it is always in the forward direction and at a (relatively) constant pace.
- deleted 9y ago[deleted]
- zaarn 9y agoTime Travel totally works in forwards. In backwards it's probably more like winding up a tape; you can rewind all you want but the tape contents won't change.
- QAPereo 9y agoTravel back in time and travel faster than light are logically equivalent, and seem to be utterly impossible in our universe. “c” does seem to be the iron law, the speed of causality, but of course who knows? I don’t see a universe without causality having people in it though!