ASTR 209 Lecture Notes - Lecture 11: Stellar Wind, Stellar Classification, Photosphere

• School: University of Calgary
• Department: Astronomy
• Course: ASTR 209
• Professor: J.Still

Document Summary

The sun experiences cycles of lower and higher activity every 11 years: ehow a magnetic fields traps a plasma. Chapter 15 surveying the stars stellar classification: the basis of our understanding of stars comes from classifying starts by. Some of them require knowledge of the distance to a star: relation between the chemical composition of a star and the way they move, some context. If a human is 10 billion times smaller, that"s the size o a silicon atom. If a human is streteched 10 billion times, still won"t be able to reach the nearest planet, venus, when venus is closest approach to earth: 8. 5 minutes for light from photosphere to get to us. They tend to be concentrated in galaxies with few starts in between: earth is located in outskirts of milky way galaxy. A spiral galaxy: star in the loal solar neighbourhood move randomly relative to one another at typical at.