The Hullius classification system, also Hullian system, was originally a list of 249 objects viewed in the skies over Aantooine. It was assembled by the Spalgar astronomer Hullius. Because of its placement in the galaxy between the Core and the Outer Rim, Aantooine could view more stellar and galactic diversity than anywhere else in the Galaxy. Included in the list were galaxies, star clusters, planetary nebulae, and diffuse nebulae.