Ancient Chinese astronomers divided the sky into 28 mansions (xiu) tracking the Moon's 27.3-day journey around the ecliptic. Each mansion corresponds roughly to one day of the lunar month.
The mansions are grouped into four quadrants, the Four Symbols (Si Xiang), each represented by a mythical animal and a cardinal direction:
Click a mansion wedge or hover to see its name, meaning, and associated star. Each mansion was used for calendar planning, agriculture, and divination.