GEK1506 Heavenly Mathematics & Cultural Astronomy, Tutorial 9

  1. The Mid-Autumn Festival will always fall between 8/9 and 8/10. In 2005 it fell on 18/9. When do you think it fell in 2006?
  2. Why was it necessary for the Chinese to have more than one hundred calendar reforms, while there were only two in the West?
  3. What are the three criteria MUIS looks at when determining the the start of the Muslim month in Singapore?
  4. Will the true Sun be ahead of or behind the mean Sun in November?
  5. Give an estimate for the dates of the earliest/latest sunrise and earliest/latest sunset in Beijing.
  6. What are the dates of the earliest/latest sunrise and earliest/latest sunset in Singapore.

Helmer Aslaksen
Department of Mathematics
National University of Singapore
helmer.aslaksen@gmail.com