Unformatted text preview: dwarfs , so the Sun is a “dwarf star” HR Diagram Giant Stars have great luminosity. Supergiants are even more luminous. White Dwarfs are fainter and bluer. Proxima Centauri – The Nearest Star to the Sun is a faint M star on the Main Sequence Use of H-R Diagram-H-R Diagram are the astronomers “most useful tool”-They quickly tell us which kind of star (giant or dwarf)-They can also reveal the mass, age & lifespan of the star.-We can use them to determine the ultimate fate of a star… including the Sun. (The most important characteristics of a star is its MASS) Mass determines the fate of the star: whether or not it will explode. Mass is measured in units of – Msun For Main Sequence Stars: more massive stars are hotter and more luminous....
View Full Document
This document was uploaded on 10/07/2011.
- Fall '09