Through the analysis of the origin of the Chi System, the author has also obtained that the semi-diameter of the celestial sphere is about 13 meters.

通过对尺寸系统起源的分析，认为古人裸眼目视观测时的天球半径约为13米上下。

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Through the analysis of the origin of the Chi System, the author has also obtained that the semi-diameter of the celestial sphere is about 13 meters.

通过对尺寸系统起源的分析，认为古人裸眼目视观测时的天球半径约为13米上下。

youdao