Article

Chushiro Hayashi's 1961 research reveals the intricate balance of gravitational and thermodynamic forces in star formation. Initially, stars gain energy through gravitational contraction, not nuclear fusion.

As they shrink, released gravitational energy heats the core, counteracting further contraction, leading to a decrease in luminosity. This process, observed in stars with masses from one-tenth to twice that of the Sun, is exemplified by the 'Hayashi track.' Understanding this balance is crucial for comprehending the life cycle of stars and their evolution.