One of the most influential astronomers in the 20th Century was Fritz Zwicky. He had his hand in the discovery of dark matter, gravitational lensing, supernovae and neutron stars. And he also worked on a few more controversial ideas like, uh, tired light. Let’s learn more about Zwicky.
Fritz Zwicky bio
Who was Fritz Zwicky?
Zwicky’s theories and discoveries:
Supernovae and neutron stars
Tired Light (incorrect, but leading to expansion of universe theories)
Catalog of Galaxies and Clusters