The Star of Bethlehem: Was it Jupiter?
http://news.discovery.com/space/the-star-of-bethlehem-was-it-jupiter.html
"Between Sept. 3 B.C. and May 2 B.C. there were three conjunctions (on Sept. 14, 3 B.C., Feb. 17, 2 B.C. and May 8, 2 B.C.) where Jupiter passed close to the star Regulus (the brightest star in the constellation Leo). This rare sequence of events would have looked very strange to those familiar with the night sky. [...]
The Three Wise Men, thought by many to have been zoroastrianist priests (who were also renowned astrologers) might have noticed this strange motion and considered it to be a 'sign.'"
