In Europe, a similar device was invented by the Danish astronomer Tycho Brahe in 1598. The fact that his invention came more than 300 years later demonstrates the advanced state of science in ancient China.
在歐洲，類似的裝置是由丹麥天文學家第谷於 1598 年發明，比中國晚了三百多年，由此可見古代中國科技的進步。