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为了帮助同学们了解日晷的原理和使用方法,星缘天文社科研部确定了制作赤道式日晷的项目。小贴士赤道式日晷的特点:1.晷盘上的刻度是等分的;2.晷面与地球赤道面平行,与当地水平面有一个夹角,大小为当地地理纬度的余角;3.晷面两面都有均匀的刻度;4.晷针位于晷面中心,且与晷面垂直;5.晷针与地轴平行,在北半球指向北天极方向;6.赤道式日晷适合中低纬度地区使用,在北半球夏季和冬季晷针投影在晷盘上的影子会分在晷盘的北面和南面。
In order to help students understand the principles and methods of using sundials, the Department of Scientific Research of Xingyuan Astronomical Observatory identified the project of making an equatorial sundial. The equatorial sundial characteristics: 1. Pan plate is equal to the division; 2. Pan face and equatorial plane parallel to the earth, with an angle between the horizontal plane, the size of the local geographic latitude of the extra angle; 4. The needle is located in the center of the plane and perpendicular to the plane of the plane 5. The needle is parallel to the axis of the earth and points to the northern sky direction in the northern hemisphere 6. The equatorial sundial is suitable for use in the middle and low latitudes In the Northern Hemisphere summer and winter needles projected on the disk of the shadow will be divided in the north and south of the disk.