Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The history of Dark Matter

  1. Sep 3, 2015 #1
    I'm wondering if someone can give a more detailed history of Dark Matter than what I've found on Wikipedia. How did Fritz Zwicky determine that a galaxy was in 'equilibrium' given the uncertainty of a line-of-sight measurement of velocity? How did he determine the mass given the variables of the mass-to-light (M/L) ratio and the poor ability (at the time) to classify galaxies? I understand a little about the Virtal Theorem, but would appreciate a 'For Dummies' type of description of how it applies to globular clusters. Any additional information about the original problem and the techniques involved would be welcome.
  2. jcsd
  3. Sep 3, 2015 #2


    User Avatar
    Science Advisor
    Gold Member

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook