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this post was submitted on 16 Jan 2024
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Maybe not one that lets you trivially violate causality but with moving portals or multiple portals, whoops...
Anyway once you're flying around the universe with your FTL portal-rockets the next question is what happens if the two ends of a portal are moving at different speeds through time. What if you drop one end into a black hole?
And what if you put one end on an enemy planet and the other end in low orbit around Betelgeuse when it finally goes supernova?
How many gamma rays will come through a hole in space about a meter across?
@[email protected] the gamma rays are gonna be mostly negligible when you get hit with particulate accelerated with a foe of energy
@[email protected] I was thinking that the portal would be very short-lived, because the surface you placed it on would be quickly destroyed, but there'd be a short period where the initial gamma rays make it through.
but yeah, if you can somehow keep it open longer than milliseconds after the instant of the star's collapse, you'd absolutely wreck anything near the endpoint