Life Cycle of a Star - Seven Main Stages of a Star - Stellar Evolution, Video, and FAQs

An old version of stellar evolution, popular at the beginning of the twentieth century, maintained that stars begin their lives as large, cool spheres of gas, like the giant stars on the H-R diagram. They then contract and heat up under the pull of their own gravity to become hot, bright blue O stars. For the remainder of their lives they lose energy, becoming dimmer and redder with age. As they slowly move down the main sequence, they eventually end up as cool, dim red M stars. Explain how obse

Types of Stars | Stellar Classification, Lifecycle, and Charts

Life Cycle of a Star Lesson for Kids

Massive star life cycle timeline

Average star life cycle