Here's an excerpt:
Reprinted by permission from Imprimis, a publication of Hillsdale College.
What astronomical events, possibly in the years 3 or 2 B.C., might have been related to the Star of Bethlehem? A nova—the unexpected, sudden brightening of a star from invisibility into a bright object for a period of days or weeks—has been suggested. But there is no historical record of such a nova, nor is it clear what a nova’s astrological significance would be. Origen himself suggested a comet, for comets appear sporadically, move, and can even seem to point down to the earth. But the recorded comets around this time, even Halley’s Comet in 12 B.C., were not very impressive; astrologically, they were considered ominous. Meteors and fireballs are even less likely candidates.
Conjunctions of planets have also long been considered good possibilities. A conjunction is a close apparent approach between two celestial objects. Technically speaking, a conjunction occurs at the moment when both objects have the same celestial longitude; one is due north of the other. The closer the objects, the more visually impressive the event and the more significant astrologically. In 3 B.C. and 2 B.C., there was a series of close conjunctions involving Jupiter, the planet that represented kingship, coronations, and the birth of kings. In Hebrew, Jupiter was known as Sedeq or “Righteousness,” a term also used for the Messiah.
In September of 3 B.C., Jupiter came into conjunction with Regulus, the star of kingship, the brightest star in the constellation of Leo. Leo was the constellation of kings, and it was associated with the Lion of Judah. The royal planet approached the royal star in the royal constellation representing Israel. Just a month earlier, Jupiter and Venus, the Mother planet, had almost seemed to touch each other in another close conjunction, also in Leo. Then the conjunction between Jupiter and Regulus was repeated, not once but twice, in February and May of 2 B.C. Finally, in June of 2 B.C., Jupiter and Venus, the two brightest objects in the sky save the sun and the moon, experienced an even closer encounter when their disks appeared to touch; to the naked eye they became a single object above the setting sun. This exceptionally rare spectacle could not have been missed by the Magi.
In fact, we have seen here only the highlights of an impressive series of planetary motions and conjunctions fraught with a variety of astrological meanings, involving all the other known planets of the period: Mercury, Mars, and Saturn. The astrological significance of these impressive events must surely have been seen by the Magi as the announcement of the impending birth of a great king of Israel.
September 11, 3 B.C., is perhaps the most interesting date of all. Not only was Jupiter very close to Regulus in the first of their conjunctions, but the sun was in the constellation of Virgo (of obvious symbolism), together with the new moon, in a configuration that fits a plausible interpretation of a passage in the Book of Revelation describing the birth of a male child who is to be the ruler of the universe. Significantly, September 11, 3 B.C., also marked the beginning of the Jewish New Year, traditionally regarded as the anniversary of Noah’s landing after the Great Flood.
But if the planet Jupiter was the Star of Bethlehem, or was a component of the events that triggered the visit by the Magi, how do we view the final appearance of the Star on their journey to Bethlehem? It would have been in the southern sky, though fairly high above the horizon. Could the Star have stopped over Bethlehem? The answer is yes. The word “stop” was used for what we now call a planet’s “stationary point.” A planet normally moves eastward through the stars from night to night and month to month, but regularly exhibits a “retrograde loop.” After it passes the opposite point in the sky from the sun, it appears to slow, come to a full stop, and move backward (westward) through the sky for some weeks. Again it slows, stops, and resumes its eastward course.
It seems plausible that the Magi were “overjoyed” at again seeing before them, as they traveled southward, “his star,” Jupiter, which at its stationary point was standing still over Bethlehem. We do know for certain that Jupiter performed a retrograde loop in 2 B.C. and that it was stationary on December 25, interestingly enough, during Hanukkah, the season for giving presents.