class O stars

Class O stars are among the most massive, luminous, and hottest stars in the universe. They have surface temperatures exceeding 30,000 degrees Celsius (54,000°F), giving them a bluish appearance. These stars emit enormous amounts of ultraviolet light and have strong stellar winds causing them to lose mass over time. They burn through their nuclear fuel extremely quickly, which means they have relatively short lifespans—only a few million years. Despite their rarity, O-type stars play a crucial role in shaping their surroundings and driving the evolution of galaxies through their intense radiation and eventual supernova explosions.