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Created page with "== Introduction == A Main Sequence Star is a type of star that is in the most stable part of its life cycle, where it spends the majority of its existence. This phase is characterized by the process of nuclear fusion of hydrogen into helium in the star's core, which provides the energy necessary to counterbalance the gravitational forces attempting to collapse the star. Main sequence stars are classified based on their spectral types and luminosity classes, and..."
