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An_Average_Player t1_j6tfkma wrote

Reply to comment by pinguin_skipper in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator

Theoretically, maybe? The biggest problem with that is that you can't physically get faster than that, even theoretically

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Varsect t1_j6u2v30 wrote

That's not possible theoretically either. The geometry of black holes makes it that the speed needed to escape is basically ∞. All pathways simply lead inside. There is no “theoretically.”

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cygx t1_j6ugvjm wrote

There is a 'theoretically': Tachyons would be able to cross event horizons.

Of course, we have no reason to believe that tachyons exist (and good reasons to believe why they don't), but if you're not careful, they may pop up in numerical simulations (that whole photon velocity being a null vector thing is a bit fragile if you do not take steps to enforce it algorithmically).

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