>> it is a historical place, revered for centuries by the faithful. it is the place where it is celebrated jesus was born. that's enough for me in my devotion. it's not enough for me as a scientist. >> and what of the other great tradition of the first christmas, the star in the east? was it a myth? or did it really exist? astronomer michael mulnar may have found the answer on a 2,000-year-old coin he bought a few years ago for $50. on one side, mulnar noticed the astrological sign for aries, which stood for judea in ancient astrology. on the other side was the god jupiter. >> when i came across the coin that showed me that aries the ram was the sign of the jews, and i asked myself, well, what event would have happened in aries the ram?