Blue+Giants+2A

A blue giant star is a very massive and giant star. They are giants because of their composition.They are a spectral type O or B. They have a luminosity that is 10,000 times brighter than the Sun.The surface temperature of a blue giant star is 30,000 K. Blue giants burn helium. Some blue giant stars are: Spica, Pleiades, Rigel, Regulus. The star Rigel is in the constellation Orion. The life span of a blue giant star is very short because it is dense and very hot. Blue giant stars expand and then explode which is called a supernova. When a supernova happens it can be seen because it is very bright.

Spica

Rigel

Regulus

Blue Giant star