Blue+Giants+1B

- A blue giant is a huge, very hot, blue star. - It burns helium - It is a post-main sequence star. - Willis is god - A Blue Giant is a star of spectral type O or B. - 10,000 Lsun is the luminosity of a Blue giant - The surface temperature of a Blue Giant is 30,000 K. - They have exhausted their core supply of hydrogen. - They are evolving to the stage where they will expand further and cool to become Red Giants. - Blue Giants reach absolute magnitudes of -5, -6 and even higher because of their extreme luminosity. - A sizable fraction of their energy output is in the ultraviolet range because their surface temperature is high. This makes it invisible to our eyes. - Blue Giants are found in large collections of loosely bounded young stars. - Their life expectancy is very short because they are so hot and so dense (in the order of tens or hundreds of million years) - Current theories predict that most of them will end their lives as supernova.


 * [[image:http://tbn0.google.com/images?q=tbn:oTfEN8EIuwccDM:http://www.msnucleus.org/membership/html/jh/earth/stars/images/bluegiant.jpg width="88" height="86" link="http://www.msnucleus.org/membership/html/jh/earth/stars/images/bluegiant.jpg"]] ||  ||

Explosion of Giant Star.