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Do tell me if I'm completely wrong but isn't part of the problem there that you're simply expecting too much from MOND? I mean a theory that is a modification

Do tell me if I'm completely wrong but isn't part of the problem there that you're simply expecting too much from MOND? I mean a theory that is a modification of classical dynamics is not going to work well in a relativistic regime. That just means that somehow the classical limit ends up being slightly different from what we thought it was for reasons we don't know yet. I've always viewed MOND as more of an empirical law that we don't have a good explanation for yet. To me at least it seems obvious it will be deficient when you extrapolate too far and it can't replace more fundamental models. That MOND can't handle relativity is not a direct reason to dismiss it. It would be a problem if relativity can't handle MOND (i.e. relativity cannot result in a MOND like theory) but I can't tell if that is the case. We could also dismiss MOND if it didn't explain anything, but as you said that's not quite the case either. So yeah, dark matter seems more reasonable, but it's hard to completely ignore a theory seems to have more predictive power (even if we know it is flawed).

burnte 2y ago
> Do tell me if I'm completely wrong but isn't part of the problem there that you're simply expecting too much from MOND? No, and the reason is because MOND is a fundamentally flawed path. We're fairly sure unified theories are the way the universe works, MOND sticks out of that like a sore thumb. If MOND wants to explain one thing, then it has to fit everything else that effects or it's wrong. Really, for a theory to overturn a preferred one, it has to be better in some way. MOND isn't, it's explains few things than dark matter, and less well. At no point have I ever heard anyone state that MOND has a better predictive power than any other accepted theory, so I'm not sure what you're referring to there. In fact, that's the primary issue with MOND theories is that they ALL fail to meet dark matter with parity, none exceed it's predictive qualities.

burnte 2y ago

> Do tell me if I'm completely wrong but isn't part of the problem there that you're simply expecting too much from MOND? No, and the reason is because MOND is a fundamentally flawed path. We're fairly sure unified theories are the way the universe works, MOND sticks out of that like a sore thumb. If MOND wants to explain one thing, then it has to fit everything else that effects or it's wrong. Really, for a theory to overturn a preferred one, it has to be better in some way. MOND isn't, it's explains few things than dark matter, and less well. At no point have I ever heard anyone state that MOND has a better predictive power than any other accepted theory, so I'm not sure what you're referring to there. In fact, that's the primary issue with MOND theories is that they ALL fail to meet dark matter with parity, none exceed it's predictive qualities.