Tyranny of Dragons
The Faerunian Goddess of the Moon, Stars, Navigation, Prophecy, Wanderers, and Questers.
In varied cultures also known as: Bright Nydra, Elah, or Lucha.
The Tears of Selune are in reference to a series of stars making up a constellation near the moon in specific phases, or sometimes all stars seen in the night sky.
By scripture and sages, Selune is the twin sister of Shar, and some times referred to as the "Bright Sister," "The Bight Twin" or the "Bright Sister" in that context.