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0 pointsbaldfat8y ago0 comments

Time 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.

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cowmoo7288y ago

I 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.

dvdkhlng8y ago

Maybe 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

[2] http://www.gregegan.net/ORTHOGONAL/02/Motion.html#LR

baldfatOP8y ago

If 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.

kumarvvr8y ago

I 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.

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