The Pleiades (Messier 45) is one of the closest and most recognizable open star clusters, located approximately 444 light-years from Earth in the constellation Taurus. Commonly known as the Seven Sisters, its brilliant blue stars illuminate a vast cloud of interstellar dust, creating the delicate reflection nebulae that have made this celestial landmark one of the most photographed and admired deep-sky objects in the night sky. Interestingly, the glowing dust is not a remnant of the cluster’s formation, but an unrelated interstellar cloud through which the stars are currently passing.