Blue stars are among the hottest and most massive stars in the universe. They have surface temperatures exceeding 10,000 degrees Celsius (18,000 degrees Fahrenheit) and can be several times more massive than our Sun, known as Sol. Due to their high temperatures, they emit a bright blue light, making them easily identifiable in the night sky. These stars have relatively short lifespans, typically ranging from a few million to a few hundred million years. They burn through their nuclear fuel quickly, leading to explosive ends as supernovae. After their death, they may leave behind neutron stars or black holes, depending on their mass.