The velocities of galaxies in the Coma cluster indicated more mass than astronomers could account for through visible objects. The discussion introduces this discrepancy as an early argument for dark matter.
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50:50the team. 1933 discovery of dark matter evidence. >> Yeah, this is Fritz Zviki. He was looking at the coma cluster while he was at Caltech and um again from Mount Wilson. At that point, Mount Wilson had been taken over by Caltech and he discovered that if you chart the velocities of all the galaxies in the Koma cluster, the math don't make sense. >> The math does not. there's got yeah there's got to be more mass in there than what we're seeing and he said maybe that's called dunul matter >> which is where we get dark matter >> if you're interested we did an episode interview while Krishna was away on dark matter with friend of the pod Daniel Gilman which gets into the weeds on that