| 英文摘要: |
The Encroachments of the Moon and the Five Planets in the 10th Year of the Xuande Reign turns out to be an important astronomical document disseminated from the Ming Dynasty in China to the Choson Dynasty in Korea during the 1440s, detailing the close approaches, or encroachments, of the Moon and the Five Planets to each other, as well as of them to various fixed stars, during the entire course of the 10th year of the Xuande Reign. This paper shows that the results in the document have been calculated with the procedure solely available from the Chinese-Islamic System of Calendrical Astronomy compiled in the early Ming Dynasty. It is quite obvious that the purpose of these calculations was for the astrology based on the close approaches of the said bodies, which turned out to be the very motive behind Zhu Yuanzhang’s decision to translate Islamic astronomy and astrology. Combined with other newly discovered materials, it is clear that the Chinese-Islamic System of Calendrical Astronomy was applied by the Ming government not only to the prediction of the lunar-solar eclipses as it is known, but also to the calculation of the civil calendars，astronomical ephemerides and the celestial encroachments. Moreover, it is also found that astrological interpretations based on the latter results were actually used by Zhu Yuanzhang in some of his political activities. |
