Dunhuang Star Chart

The symbols used to depict stars on the Dunhuang Star Map are categorized into three distinct groups, each corresponding to one of the traditional Chinese astronomical schools. These schools—known collectively as the "Three Schools of Astronomical Tradition"—are visually distinguished on the map through the use of three separate ink colors, allowing the viewer to differentiate the varying lineages and systems of celestial knowledge that coexisted during the period. Each group reflects a specific strand of astronomical interpretation practiced in ancient China, representing the work of different court astronomers or regional traditions. This color-coded system not only organizes the stars and constellations according to these schools but also offers valuable insight into how astronomical knowledge was compiled, compared, and transmitted in Tang-era China. ==See also==