Magiccupcake@startrek.websitetoShowerthoughts@lemmy.world•A time machine that allows you to travel as a ghost would be the best time machine.
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9 months agoIt actually goes further than that. In spacetime you’re always going the same speed, the more in space, less in time.
At least from the special relativity perspective.
Not quite, the true invariant quantity is the magnitude of the spacetime 4 vector, which depends on rest mass.
https://en.m.wikipedia.org/wiki/Four-momentum