The Cosmo Leap Sigma is an optical planetarium projector for medium-sized domes operated by municipalities. It is the smallest projector in its class, combining the star ball and planet projectors, and the first in the world to be equipped with 80 constellation images to enable an all-inclusive analysis of the night sky. All the projector movements convey the inherent order of the universe. The star ball is surrounded by a rod framework like a twinkling star.