With all reserve we advance the view that a supernova represents the transition of an ordinary star into a neutron star consisting mainly of neutrons. Such a star may possess a very small radius and an extremely high density. As neutrons can be packed much more closely than ordinary nuclei and electrons, the gravitational packing energy in a cold neutron star may become very large, and under certain conditions may far exceed the ordinary nuclear packing fractions.
Fritz ZwickyI have a good idea every two years. Give me a topic, I will give you the idea! [Reputed to have been a remark made to the head of his department at Caltech.]
Fritz ZwickyAstronomers are spherical bastards. No matter how you look at them they are just bastards.
Fritz ZwickyMountains were once my big adventure but is is over since a long time; I still dream from the wonderful days sometimes, read also a few pages from a mountain book. But the thought of doing again active mountain climbing has faded.
Fritz Zwicky