zhōng / guó / gǔ / dài / tiān / wén / xué / jiā / yòng / hún / tiān / yí / guān / cè / tiān / tǐ / yùn / xíng

中国古代天文学家用浑天仪观测天体运行。

Ancient Chinese astronomers used the armillary sphere to observe the movements of celestial bodies.