This is really great. It has always bothered me (as a non-physicist) for precisely this point: "Sure, if there was dark matter, the speed of stars would be gre

This is really great. It has always bothered me (as a non-physicist) for precisely this point: "Sure, if there was dark matter, the speed of stars would be greater, but the rotation curves, meaning the rotational speed drawn as a function of the radius, could still go up and down depending on its distribution. But they didn’t. "