Three dimensional observing device of moon phase changing

摘要

PURPOSE: A three dimensional observing device for the change of the moon is provided to help a user to know the principle and conception of the shape change of the moon. CONSTITUTION: A plurality of moon models have a bright part in haft of the surface there while having a dark part in the other part. A plurality of view line induction cylinders(107) has an eye hole(171) in one side while having an object hole in other side. The view line induction cylinders is formed into a hollow and has an eye contact hole(154') at the center. The view line of a user is concentrated to the moon model. A plurality of view line induction cylinders has an extended plate in radial direction.