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First, watch this film about the evolution of stars: • The evolution of stars In this film, I go into more detail with the technical explanations of why stars evolve the way they do. To do this, I introduce concepts such as hydrostatic equilibrium, fusion, degeneracy, etc. I focus on the evolution of the Sun or other stars the size of the Sun Correction: 05:30: In the formula, the fraction in the denominator in brackets should be raised to 2.5. This means that there is an even greater difference between the lifetimes of light and heavy stars