Arcana Sidera The Arcana Sidera star cluster is a small star cluster in the Scutum-Centaurus arm of the Kerbal Galaxy. Located directly in the shadow of the galactic core and orbiting at a distance of 229.81 lightyears, the cluster went unnoticed for millennia until the exploration of the Sagittarius A system, where it was located by one of the scientists on board the expedition. Long thought to be a single blue giant star, upon further observation the cluster was discovered to actually be