== the difference == 

  NUCLEAR ENERGY BY ALL MEANS RELATES TO FISSION AND FUSION OF MATTER.THE ENERGY DERIVED FROM THE INTERLINKING OF ATOMS IN ME 	 OLIC STATE CAN BE DESCRIBED AS WHAT IS NOW CALLED NUCLEAR ENERGY. IT CAN THUS BE RELATED TO NUCLEAR PHSYICS OR NUCLEAR THEORY.WHEN BY NUCLEAR REACTION TWO MASS OF ENERGY FUSE TOGETHER TO FORM NUCLEAR ENERGY. 
 FOR EXAMPLE THE BIG BANG THEORY CAN BE TAKEN INTO CONSIDERATION.