Also note:

A fascinating illustra-

tion of the 19-year

calendar cycle has

just been (unwittingly)

provided us by the

Texas State University 

astronomy department: 
http://talbot.mrp.tx
state.edu/currents/
fullstory.jsp?sid=474
another story: 
http://www.new
scientist.com/article.
ns?id=dn7888

Mosaic pavement of a 6th century synagogue at Beit Alpha,
Israel, replicated in Beth Tzedec. Signs of the zodiac surround
the central chariot of the Sun (a Greek motif), while the
corners depict the 4 "turning points" ("tekufot") of the year,
solstices and equinoxes, each named for the month in which
it occurs--tekufah of Tishrey, (tekufah of Tevet), tekufah of
Ni(san), tekufah of Tamuz