 
  
  
   
Chandrasekhar (1931) [8] 
 
  White dwarfs collapse at
   White dwarfs collapse at   
  
Baade & Zwicky (1934) [1] proposed:
 
  existence of neutron stars
   existence of neutron stars 
 
  their formation in supernovae
   their formation in supernovae 
 
  radius of approximately 10 km
   radius of approximately 10 km 
Oppenheimer & Volkoff (1939) [26] 
 
  Evaluated first equation of state
   Evaluated first equation of state 
 
  Mass
   Mass   
  
 
  Radius
   Radius   km
  km 
 
  Density
   Density   gcm
  gcm  
  
Pacini (1967) [27] proposed: 
 
  electromagnetic waves from rotating neutron stars
   electromagnetic waves from rotating neutron stars 
 
  such a star may power the Crab nebula
   such a star may power the Crab nebula
