Destroying a star

[HandofShadows]

That's been fairly clear ever since Einstein formulated his theories of relativity more than a century ago now. Any time an SF writer invoked hyperspace, warp drive, wormholes or whatever they're using something known to be impossible. I think this is why the likes of the Expanse is set entirely within the Solar System, because that's more realistic (even if it requires impossibly efficient fusion drives to make the whole thing work).

Um, you do know that the Expanse has branched out into other star systems using alien created wormholes, right?

Not quite: causality will still work just in a way that makes you have a headache. There are even publications explicitly solving simplified versions of grandfather paradox for example (ball is thrown into a wormhole and hits itself off the course so it never enters the portal in the first place). Those situations only show that you cannot find the solution in an iterative manner but they still exist. Worse yet: one of the most elegant interpretations of quantum electrodynamics requires you to consider antimatter as regular matter moving back in time and in this case virtual particles are simply ontological loops (they exist, because they made themselves exist in the past).

Some of the tests they have been doing with the double slit experiment have really been playing games with quantum physics (even worse than normal). The Delayed Choice Double Slit experiment gave results that the particles acted as if they were being observed before they actually were observed. (Result of an action being taken before action the action took place.) The Delayed Choice Quantum Eraser Double Slit gave results that indicate the particles "chose" the path they took after they ended the journey. No such thing as time?