Astronomy Research
Sundial
08/26,2020
Sundial is widely used to measure time in ancient China. This sundial was made in Qing Dynasty, and is 13 centimeters long and 11.7 centimeters wide.
Sundial is widely used to measure time in ancient China. This sundial was made in Qing Dynasty, and is 13 centimeters long and 11.7 centimeters wide.
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