1. Beijing Planetarium (Simplified Chinese) 2. Beijing Ancient Observatory (Simplified Chinese) 3. Astronomy course (Traditional Chinese) 4. Purple Mountain Observatory (Simplified Chinese) 5. Juergen Giesen's GeoAstro Applet Collection (English) 6. Chinese Astronomy (English) 7. Chinese and Gregorian calendar Conversion (Traditional Chinese) 8. The Mathematics of the Chinese Calendar (English) Brief Introduction Exhibit Highlights Royal Astronomer Charter Exam Ancient Chinese Astronomy Exhibition Main Page Extension Activities Souvenirs Related Websites