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    • 26. 发明授权
    • Apparatus for providing a representation of celestial bodies
    • 提供清洁机构代表的装置
    • US3673710A
    • 1972-07-04
    • US3673710D
    • 1970-01-05
    • WILLIAM A EISENHAUERWILLIAM P EISENHAUERIDA J TRUSTLEIGH E EISENHAUER
    • EISENHAUER WILLIAM A
    • G09B27/04G09B29/00
    • G09B27/04
    • A Copernican planisphere for providing an indication of stars visible from a particular latitude on a predetermined date at a selected time and the method of operation thereof is disclosed. The planisphere structure and method of operation disclosed facilitates understanding of the Copernican principles of the relation of the heavenly bodies, accurate estimation of moon phases, and the determination of the time before which a particular heavenly body will appear at a viewing meridian, the rising and setting time of a heavenly body, the declination of heavenly bodies and the altitude thereof. Both astronomical and navigational information are provided on the planisphere disclosed. The planisphere structure includes a plurality of concentric dials, which are progressively larger in diameter downwardly, centrally mounted for relative rotation on a pivot pin. The upper dial is a mask through which a portion of the dial below is viewable. The mask includes an indicator portion having a window therethrough extending radially outwardly over the remainder of the dials. A reference rule is pivotally mounted centrally of the dials at one end and extends radially beyond the outer diameter of the larger of the dials. The reference rule is positioned between the mask and adjacent dial.
    • 公开了一种在选定的时间提供从特定纬度在预定日期可见的星星的指示的哥白尼平面及其操作方法。 公开的平面结构和操作方法有助于理解哥白尼的天体关系原理,准确估计月相,以及特定天体将出现在观察子午线的时间的确定,上升和 设定天上的身体,天体的衰落及其高度。 在所公开的平面图上提供了天文和导航信息。