A B-type star is a type of massive star characterized by its blue-white color and high surface temperature, typically ranging from 10,000 to 30,000 Kelvin. These stars are much larger than our Sun and are known for their strong ultraviolet radiation. B-type stars are often found in young star clusters and play a significant role in the evolution of galaxies. These stars have a relatively short lifespan, usually lasting only a few million years before they exhaust their nuclear fuel. When they reach the end of their life cycle, they may explode as a supernova, leaving behind a neutron star or black hole. Their brightness and mass make them important for studying stellar evolution and the dynamics of star clusters.