The Nebula Coronae is a diffuse cloud of star dust discovered by Inc Ir'Ardehn from atop the Planetarium of the Crown at the behest of the Rubedan Master of Cauda Pavonis in 583 AF. The nebula resonates with the power of copper, a valuable resource to the alchemist, and he urged Hashan to name the fixture in the heavens. Thus was the Nebula Coronae discovered.
Adventurer alchemists later discovered that by focusing their city orreries upon the heavenly body they might convey increased endurance and willpower regeneration to their fellow citizens.