An O-Type Main Sequence Star is a type of star characterized by its high temperature and brightness. These stars have surface temperatures exceeding 30,000 Kelvin and emit a blue or blue-white light. They are among the most massive stars, often exceeding eight times the mass of the Sun. Due to their immense energy output, they have relatively short lifespans, typically lasting only a few million years. O-type stars are crucial in the study of stellar evolution and the dynamics of galaxies. They produce heavy elements through nuclear fusion and contribute to the chemical enrichment of the universe when they explode as supernovae. Their intense radiation can also influence the formation of nearby stars and planetary systems.