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

In the context of stellar evolution, what is the primary proces... | Filo

Astronomy & Astrophysics 101: Stellar Wind

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

First Science Snippets: Stellar Physics and Stellar Life Cycle - NASA Science

Red Supergiant Definition, Temperature & Life Cycle

Star Lifecycle - NASA Science