<P> In nuclear physics , nuclear fusion is a reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles ( neutrons or protons ) . The difference in mass between the products and reactants is manifested as the release of large amounts of energy . This difference in mass arises due to the difference in atomic `` binding energy '' between the atomic nuclei before and after the reaction . Fusion is the process that powers active or `` main sequence '' stars , or other high magnitude stars . </P>
<P> In nuclear physics , nuclear fusion is a reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles ( neutrons or protons ) . The difference in mass between the products and reactants is manifested as the release of large amounts of energy . This difference in mass arises due to the difference in atomic `` binding energy '' between the atomic nuclei before and after the reaction . Fusion is the process that powers active or `` main sequence '' stars , or other high magnitude stars . </P>
what happens in the sun fission or fusion
what happens in the sun fission or fusion
Fusion
Fusion