The study of the primitive universe necessarily involves understanding the functioning of the first stars that, according to the simulations of star formation, could be very massive. In this context, understanding the evolution of massive stars is key to interpreting the processes of star formation that took place in the early cosmic epochs. In that period, the universe was still poor in metals (for astrophysicists, the chemical elements that are not hydrogen and helium have the denomination of metals), so that

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