A B-type main-sequence star is a type of star that is larger and hotter than our Sun. These stars have surface temperatures ranging from about 10,000 to 30,000 Kelvin and are typically blue or blue-white in color. They are more massive than A-type stars and can be up to 20 times the mass of the Sun. B-type stars burn their hydrogen fuel quickly, leading to shorter lifespans of around 10 million years. These stars are often found in young star clusters and are important for studying stellar evolution. Due to their brightness, B-type main-sequence stars can be seen from great distances, making them valuable for astronomers. Their strong stellar winds can also influence the surrounding interstellar medium, contributing to the formation of new stars.