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The above-described sequence of nuclear reactions is called the hydrogen cycle. In a single cycle, creating a helium nucleus from four protons emitted energy is 26.7 MeV and this is the main energy source of stars. Some energy is lost by the escaping neutrino how to lose weight fast ).

The colliding nuclei are usually less energy than the energy needed to overcome the electric potential barrier, but pass through it due to the phenomenon called quantum tunneling effect. As a result of the synthesis of new nuclei are produced, neutrinos and photons. High-energy photons matter shall first star, heating it to over time as the heat radiation to escape from the star. Almost all of the neutrinos leave the interior of stars without collisions with matter star. For photons, the environment inside the star is not transparent. Mean free path of high energy photon in the interior of the Sun is about 10 - 3 m. The escape of energy from the interior of the star on the outside is due to the high-energy radiation, heat radiation and convection of gas in the star. These processes also affect change in motion of particles in a magnetic field.