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  Chinese celestial globe

  These globes from 1830 reflect how global exchanges produced new objects of knowledge and how the places where science happened were transformed. Qi Yanhuai, an official from Suzhou, manufactured this globe to update the imperial star catalog called the Compendium of Computational and Observational Astronomy (1723) and its Supplement (1742), the result of efforts by Jesuit and Chinese astronomers. By the 1820s the data was judged to be out of date and consequently astronomers such as Qi Yanhuai and Zhang Zuonan conducted new observations. These globes, therefore, demonstrate how Chinese users applied such translated models for their own purposes. Moreover, these globes expanded the audience for who produced astronomical knowledge. During the 18th century, exchanges occurred primarily at the Imperial court with Jesuit missionaries and other go-betweens. Yet that knowledge was limited. Only a handful of libraries had access to such printed books or manuscripts. These celestial globes aimed to distribute this knowledge more broadly through a different media and experience. They simplified computation and allowed for most educated people to participate. One remarkable feature of these globes is that they also function as clockwork devices. Created by Chinese clockmakers, these mechanisms transferred a global technology into a useful system for Chinese officials and families. The clock reported hours and time according to the traditional system of timekeeping in China, rather than simply a wall decoration. Moreover, since some globes included bells for hours of sunrise and sunset, the clocks could also be used as a practical device for bureaucratic needs to report those times to the city watch. More than just repurposing technology in a local context, Qi Yanhuai claimed that this feature was in fact what made them so useful as knowledge making devices. Although some conservatives viewed elaborate automata as wasteful and unnecessary or as appealing to base senses for popular audiences, Qi said that clockwork allowed one to check and evaluate celestial positions with just a single glance. They made calculations easier. “If your household has one, even your wife and children will be able to know the stars,” he said. Although clockwork connected this device to the world of entertainment, Qi suggested they were “Chinese instruments.”