1. In astronomy, the diagonal band on the Hertzsprung-Russell diagram where most stars lie, characterized by hydrogen burning in their cores; represents the longest stable phase of a star's life
Our Sun is currently in the main sequence phase of its stellar evolution.
O nosso Sol está atualmente na fase de sequência principal da sua evolução estelar.
2. Stars on the main sequence are classified by spectral type and luminosity, ranging from red dwarfs to blue giants
Main sequence stars exhibit a clear relationship between mass and luminosity.
As estrelas da sequência principal exibem uma relação clara entre massa e luminosidade.