marvelous resources on the site of Helmer Aslaksen,
www.math.nus.edu.sg/aslaksen/teaching/heavenly.html
This is for his course, Heavenly Mathematics: Cultural Astronomy!
The number of topics of interest to this mailing list is enormous.
Look at the Astronomical Instruments. Not only sundials but there
is a link to his A Guide to ìThe Sun in the Churchî by J.L. Heilbron
<http://www.math.nus.edu.sg/aslaksen/teaching/heilbron.html>
There are several links to javascript animations and videos done by
Nick Strobel (another good resource site) to illustrate topics that are
often discussed on this list.
Claude Hartman
35N 120W
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