The problem with any theory of modified gravity is that there is just no physica...

KingMob · 2026-10-21T06:22:28 1792563748

> explain away dark matter

This kind of presumes dark matter has been definitively proven already, though.

From the outside, CDM may be a better theory than MOND, but it doesn't seem settled to me. I haven't heard anyone describe it as a "Law" yet.

Couldn't someone equally characterize the creation of dark matter as "adding and tweaking mass until you fit the data"?

Sniffnoy · 2026-10-22T06:08:25 1792649305

Man, you're doing the thing I just complained about, where you implicitly frame MOND and CDM as the only two alternatives! :P

KingMob · 2026-10-23T06:57:28 1792738648

Fair, I'm not a physicist. I don't really know the more obscure variants of dark matter and modified gravity theories.

But what about you? Are you not doing https://xkcd.com/2501 ? Is your expectation reasonable on HN?

Sniffnoy · 2026-10-20T21:34:48 1792532088

Hm, MOND is full of new parameters (an entire interpolation function!), but do other modified gravity theories really have so many? I guess actually I don't know the answer to that, maybe they do. Do you know how many others have?