Apparatus and didactic method for teaching and showing primary o

Apparatus and method for finding and identifying nighttime sky o

Apparatus for demonstration of earth's rotation about the sun

Astronomical display apparatus

Automatic tracking astronomical globe

Celestial globe

Device for depicting constellations on a ceiling

Device for simulating the movements of and representing rotation

Devices for aiding astronomers to locate stars and other celesti

Digital solar system model

Educational amusement device and jewelry item

Fixed-star projecting machine for planetarium

Interactive astronomical system and method

Interactive astronomical system and method

Light charged celestial simulation device

Manually indexed adjustable focal length planetarium

Method of and system for drawing an image over stars in the sky

Moon phase demonstration system

Multi-dimensional astral position finding device

Multi-function globe with its related planets