A B-Type Star is a type of massive star characterized by its blue color and high surface temperature, typically ranging from 10,000 to 30,000 Kelvin. These stars are much larger than our Sun and have a significant luminosity, often thousands of times greater. They are primarily composed of hydrogen and helium and are known for their rapid rotation. B-Type Stars are relatively short-lived, with lifespans of only a few million years due to their high rate of nuclear fusion. They play a crucial role in the evolution of galaxies, contributing to the formation of heavier elements through supernova explosions at the end of their life cycle.