An O-type main-sequence star is a massive and hot star classified in the spectral type O. These stars have surface temperatures exceeding 30,000 Kelvin and emit a blue or blue-white light. They are among the most luminous stars, often shining thousands of times brighter than the Sun, and they typically have a short lifespan of only a few million years due to their rapid consumption of nuclear fuel. O-type stars are crucial for the formation of elements in the universe and play a significant role in the evolution of galaxies. They often end their lives in spectacular supernova explosions, contributing to the creation of neutron stars or black holes. Their intense radiation can also influence the surrounding interstellar medium, affecting star formation in nearby regions.