> Zwicky's work was largely forgotten until the 1970s, when astronomer Vera Rubin discovered that nearby galaxies were not spinning in the right way. What Vera

> Zwicky's work was largely forgotten until the 1970s, when astronomer Vera Rubin discovered that nearby galaxies were not spinning in the right way. What Vera observed was that the stars in distant galaxies were all spinning "together". One would expect some stars in the galaxy to spin at a faster speed than others at varying distances from the center. What she observed is akin to a single "galaxy" bitmap rotating all at once, where the relative positions of the stars in the galaxy "image" being in lockstep with each other. Dark matter. Hehe.