Main Sequence Stars

Main sequence stars are stars that are in a stable phase of their life cycle, primarily fusing hydrogen into helium in their cores. This process produces the energy that makes them shine and emit light. Our Sun is a typical main sequence star. These stars range in size from small, cool red dwarfs to massive, hot blue giants. They remain in this phase for most of their lives, maintaining a balance between gravity pulling inward and nuclear fusion pushing outward. This stability is why they are called "main sequence" stars, as they form a continuous band on a star classification diagram.