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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....
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- Fall '09