Constellations are a mechanic added by Astral Sorcery. They are used to bestow effects beneficial to players. There are three kinds of constellations: bright, dim, and faint. There are currently 16 constellations available: 5 bright, 7 dim, and 4 faint. All constellations (except the faint ones) can be used to attune Rock Crystals, Celestial Crystals, and the Mantle of Stars as well as for enchanting via the Stellar Refraction Table. Bright constellations can be attuned to players by using an Attunement Altar to give them a set of perks or the Resonating Wand to give an extra effect when held in the player's main or off-hand.
To discover constellations, the appropriate Constellation paper must be acquired by the player first; this will display the constellation's image in the "Constellations" tab in the player's Astral Tome. Then, they must be discovered by looking through a Looking Glass or Telescope at night—the former is limited to only seeing bright constellations. Using the paper as a reference the player must trace the constellation out on either device using the mouse. Once a constellation has been discovered it will permanently be displayed in the night sky when it is in view and extra information is added to the "Constellations" tab in the Tome.