← Explore on the interactive map

Song Dynasty Astronomy and Calendar Reform

Type Event Region Asia Time 1111

Around 1111, the Northern Song Astronomical Bureau continued revising astronomical observations and calendar calculations to correct precession, ecli…

Timeline

  1. 1111Astronomical Bureau observatory, Bianjing · Northern SongAstronomical Bureau officials continuously observed stellar positions and solar and lunar movements, comparing them with earlier calendar data to detect cumulative errors in solar term and new/full moon timings.
  2. 1111Bianjing · Northern SongBased on new observational data, calendar constants were adjusted, new moon and intercalary arrangements and solar term tables revised, and the court was memorialized to promulgate them for nationwide agricultural and ritual use.

Sources