Stars are born from an explosion of a dying star, called star clusters. They are twins, yet not identical twins. In the H–R diagrams for some young star clusters, stars of both low and high luminosity can be located off the main sequence, whereas 90% of stars are on the main sequence. Can you offer an explanation for why some stars are Red Giant and others White Dwarfs? Use the H–R diagram to aid your explanation as a star evolves off the main sequence.
