The author also seems to have an interesting course on astronomy and culture: We will look at questions like: How is the date of Chinese New Year determined? W

The author also seems to have an interesting course on astronomy and culture: We will look at questions like: How is the date of Chinese New Year determined? Why do the Muslim and Chinese months start on different days? Will the Moon ever look like it does on the Singapore flag? What date of the year is the earliest sunrise in Singapore? How did ancient sailors navigate? http://www.math.nus.edu.sg/aslaksen/teaching/heavenly.html http://www.math.nus.edu.sg/aslaksen/teaching/heavenly.html