+The **main sequence** is the stable phase where a [Star](/wiki/star) spends most of its existence, steadily fusing [Hydrogen](/wiki/hydrogen) into helium in its core. This long-lasting equilibrium between gravity and internal pressure defines the star's primary life stage, seen as a distinct band on the Hertzsprung-Russell diagram.
+## See also
+- [HR Diagram](/wiki/hr_diagram)
+- [Stellar Evolution](/wiki/stellar_evolution)
+- [Red Giant](/wiki/red_giant)
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