1. twenty-eight mansions of Chinese astronomy (constellations dividing the ecliptic into 28 positions)
Wikipedia definition
2. Twenty-eight mansionsThe Twenty-eight Mansions, hsiu, xiu or sieu are part of the Chinese constellations system. They can be considered as the equivalent to the zodiacal constellations in the Western astronomy, though the Twenty-eight Mansions reflect the movement of the Moon in a lunar month rather than the Sun in a solar year. Another similar system, called Nakshatra, is used in traditional Indian astronomy.
Read “Twenty-eight mansions” on English Wikipedia
Read “二十八宿” on Japanese Wikipedia
Read “Twenty-eight mansions” on DBpedia


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