A planetarium apparatus of this invention memorizes a plurality of texture image data expressing conditions of a surface of an object in a picture memory by relating to the range of a distance from a viewpoint to the object. The polymer may be used in a semiconducting layer of an electronic device. In a case where it is determined that there are connectable fragments which refer to the same resource, the apparatus generates a uniform resource identifier by integrating the connectable fragments. Each block also includes an area in which a block status flag is recorded which indicates that data recorded in a block has been deleted. The process is self limiting due to the limited quantity of silyl groups within each region of the pattern. Downwardly-sloping powder dispenser baffles extend alternatingly from powder dispenser rear wall side edges, creating a serpentine powder path to improve powder distribution.