pla·ni·sphere /ˈplenəˌsfɪr/
平面球形圖,平面天體圖,星座一覽表
Plan·i·sphere n. The representation of the circles of the sphere upon a plane; especially, a representation of the celestial sphere upon a plane with adjustable circles, or other appendages, for showing the position of the heavens, the time of rising and setting of stars, etc., for any given date or hour.
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