[kadoban]

> I think the observational results are caused by something else that's not understood or seen yet.

Since it's not seen or understood, we could say it's "dark" for brevity. And since it's clearly affecting gravity let's just say "matter" for short.

[naasking]

Nah that already presumes that it's a separate thing. It could be a modification of gravity instead.

[kadoban]

It could at one point have been, but that's basically been ruled out by further observations.

It's hard to say why only _some_ galaxies have their gravity modified without it being caused by some sort of substance.

[naasking]

> It could at one point have been, but that's basically been ruled out by further observations.

It really hasn't. The same standard of evidence that would rule out modified gravity would also rule out dark matter.

[throwawaymaths]

We could also call it the "Jesus Christ effect" too. Certainly that wouldn't suggest any sort of mechanism or bias interpretations of what could cause it