“A Stars” refers to a classification of stars that are among the hottest and most luminous in the universe. They have surface temperatures exceeding 7,500 degrees Celsius and emit a blue-white light. These stars are typically very massive, often more than twice the mass of our Sun, and they burn through their nuclear fuel at a rapid rate, leading to shorter lifespans. Due to their high temperatures and brightness, A Stars can be found in various stages of stellar evolution. They often end their life cycles in spectacular supernova explosions, leaving behind remnants such as neutron stars or black holes. Their study helps astronomers understand the life cycles of massive stars and the dynamics of galaxies.