GENERAL KNOWLEDGE

Detailed explanation-1: -Nuclear Fusion reactions power the Sun and other stars. In a fusion reaction, two light nuclei merge to form a single heavier nucleus. The process releases energy because the total mass of the resulting single nucleus is less than the mass of the two original nuclei. The leftover mass becomes energy.

Detailed explanation-2: -The energy of the stars comes from nuclear fusion processes. For stars like the sun which have internal temperatures less than fifteen million Kelvin, the dominant fusion process is proton-proton fusion.

Detailed explanation-3: -In stars, hydrogen nuclei combine together to form helium nuclei and during this process it releases energy. This process is called nuclear fusion. Hence, in stars, the energy production takes place through nuclear fusion.

Detailed explanation-4: -Most commonly, in the core of a star, two hydrogen atoms fuse to become a helium atom. Although nuclear fusion reactions require a lot of energy to get started, once they are going they produce enormous amounts of energy (Figure below).