Patent ID: 7438422
Filing Date: 2008-10-21
Classification: G03B,G09B

Abstract:
1. A structure for displaying configuration of a portion of the night sky, the structure comprising: a computer, having a temporary or permanent memory that contains at least one image signal representing one or more images of a portion of the sky when viewed from an arbitrarily selectable position; a projector that receives the at least one image signal from the computer and forms and projects a visually perceptible image; a substantially spherical light-reflecting first surface and first surface positioning mechanism, having a first surface geometric center at a selected location, for receiving and reflecting at least a portion of the visually perceptible image from the projector; and a second surface, having a shape of substantially a steradial sector of a hemisphere and having a second surface geometric center located at substantially the same location as the first surface geometric center, for receiving and displaying the visually perceptible image reflected from the first surface, wherein the computer, the projector, the first surface and the second surface have a total mass not, exceeding about 20 Kgm.