AST201H1 Lecture Notes - Lecture 9: Orion Nebula, Barnard 68, Molecular Cloud

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST201H1
• Professor: Marija Stankovic

Document Summary

Info about stars and evolution, focus on the information on the pdf, read the textbook. Mass can determine the lifetime of a star. The smaller will live longer, the rate it diffuses hydrogen is lower. Blue and red star, red one is cooler, less energy. Red star determines temperature, diffusion rate will be slower, not as much material and energy. Temperature, mass, age, luminosity (blue stars are brighter) Stars are born in cool and relatively dense and clouds of gases and dusts. Obscure the light that comes from these stars. Expect to see more blue stars just because they are brighter. Not only blue stars are more massive but shorter lifetime. Less amount of time to form high mass star than a low mass star. You make them faster, initially they will dominate the region. The regions where dark parts are, tell us where the dust is. Most of the light at the spiral is dominated by blue light.