The Constellation Paper is an item added by Astral Sorcery. Upon entering a player's inventory, the Constellation Paper is assigned to a previously undiscovered Constellation and will display the constellation when examined. The player will then receive an entry for that constellation in their Astral Tome. Constellation Papers are only found in in Astral Sorcery Ancient Shrine Chests. They can be stored in the Astral Tome by shift right-clicking with the Tome in hand to open up its personal inventory.
Constellation paper provides information on the look and shape of the constellation associated with it, as well as the moon phases in which the constellation will be visible.
Constellation paper will only allow the player to see the constellations available to them at their current stage of progression within Astral Sorcery. Other pages will remain blank until they have progressed far enough in the mod to understand them. Once sufficiently advanced in the mod, empty Constellation Paper can be dropped and picked up again to discover the Constellation associated with it.
In addition to providing constellation information, Constellation paper can also be used to set up the Attunement Altar. By holding the relevant Constellation Paper, light motes will emerge from the blocks where Spectral Relays must be placed in order to attune the altar to the constellation.