Cosmon
Cosmon or Cosmonium is a hypothetical form of matter. The idea was originally proposed by Georges Lemaître, who suggested the concept of a 'primeval atom’ (L'Hypothèse de l'Atome Primitif) 1946. He illustrated the idea by imagining an object 30 times larger than the volume of the sun containing all the matter of the Universe. Its density would be around 
  
    
      
        
          10
          
            15
          
        
        
          
            g cm
          
          
            −
            3
          
        
      
    
    {\displaystyle 10^{15}{\text{g cm}}^{-3}}
  . In his view, this occurred somewhere between 20 and 60 billion years ago.The idea of a primeval “super-atom” lived on and was developed forward by Maurice Goldhaber in 1956.