Random comment: Scientists know with pretty high confidence that beyond a certain distance, everything (stars and galaxies) are moving away from us at faster than the speed of light. Or, I should say, the space in between us and those stars is increasing at faster than the speed of light. (*very simplistic, poorly worded description of cosmic expansion).
OTOH, the event horizon of a black hole is where spacetime is contracting at faster than the speed of light (*very simplistic, poorly worded sentence. Any physicist reading can feel free to correct me on terminology).
Basically, the speed limit for how fast mass and energy can travel *through* space is the speed of light but it appears that space itself, for lack of a better word, moves and we don’t know the limits on that.
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