Introduction The starry sky is vast and awe-inspiring. Mastering the laws of the movement of celestial bodies is a dream that mankind pursues tirelessly, and the astrolabe is the crystallization of this dream. The word "astrolabe" means "holder" (lemma) of the "star" (astro). Using the stereographic projection, the astrolabe shows the basic diagram of the two-sphere cosmology. It is a multi-functional instrument integrating observation, demonstration, timing and calculation.​ The origin of the astrolabe is unknown, but it is generally believed to have originated in ancient Greece. It flourished in the Islamic world in the Middle Ages, and was later introduced...

Introduction The exhibition focuses on the records of late Qing scholars' encounters with Western society, with approximately 100 sets of Western scientific artifacts from the collection of the Tsinghua University Science Museum. It showcases the Western scientific and technological world as perceived by late Qing Chinese intellectuals. The exhibition will be integrated with the training courses for graduate students in the Department of History of Science at Tsinghua University, highlighting the academic achievements of faculty and students in the fields of the history of science, especially the studies of historical scientific objects from both China and the West in contemporary...