The Cosmo Leap Sigma is an optical planetarium projector for medium-sized domes operated by municipalities mainly for education. Multiple projectors, which were installed independently in conventional products, are integrated in the new framework layout, significantly reducing the size. Konica Minolta was the first in the world to succeed in building 80 projections (5 times the conventional model) into a star ball, enabling a detailed narrative of the starry skies in a small space. A rigid arch structure is used for the main frame that supports the star ball to combine the planet projectors systematically and linearly. This neat shape prevents blurry stellar images and obstruction of view. The star ball is surrounded by a rod framework of elaborate polyhedra. The rods extend radially from a myriad of lenses and are anodized in black to make the jet-black star ball glitter like the twinkling stars. All the projector movements of the Cosmo Leap Sigma convey the orderly universe. The elaborate design is harmonized with the cosmic space in a dome, inviting children to explore and hear detailed stories of the starry skies.