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marshall x gumball (2023-12-18 17:11:27)
不管中国,还是阿拉伯,西方国家,在古代,陆地标志都是航海重要指南,如果没有地标,就用复矩之类测星仪,结合指南针,航海地图进行定位,所以,古代很重视天文观测,注意到磁偏角现象,也理由二十八星宿,北极星距离进行定位,能准确测量子午线长度,这水准都不低。
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