Selûne, Moon of Toril

The Moon of Toril, known as Selûne's domain, features multiple celestial bodies, primarily the two moons: Selûne, the primary moon, which waxes and wanes, influencing tides and magic, and Shar's moon, known as Tharizdun, which embodies darkness and chaos. These moons are central to various cultures, playing significant roles in navigation, calendar systems, and religious practices. Selûne's moon is often depicted as a symbol of hope and guidance, while Shar's moon represents mystery and shadow. Together, they reflect the balance of light and dark in the world of Faerûn.

From Toril, while Selûne appeared to fit within the size of a human fist an arm's length away, the Tears of Selûne extended for almost three handspans wide and three fingers deep at the same distance. From the ground, the Tears appeared as stars and were often identified as nine in number (the other bodies that made up the cluster were too indistinct to make out). The Tears were only bright enough to be seen at night, and even then they were not seen every night. The first tear appeared above the horizon about four hours after Selûne rose, and it took about three hours for the entire set of Tears to rise or set.

Forgotten Realms - Selûne (Moon)