The Star of Bethlehem: Jupiter, Regulus and Venus?

Tonight at the Bible Study we watched a DVD about the Bethlehem Star. An American lawyer called Larson using computer software has calculated that Matthew's star would have been a conjunction of Jupiter, the King planet and Regulus, the King star, dancing between Leo ('I am the Lion of the tribe of Judah') and Virgo, or the virgin. 
Eight to nine months later, a conjunction of Jupiter, the largest planet, and Venus, the brightest, would have apparently been moving across the sky over Jerusalem and Bethlehem which the magi would have seen and followed. 
Although not everyone was convinced, he did present a plausible case. Unlike explanations that says the star was a one-off special event, this theory means that the Creator, when He was arranging the starry host and determining their orbits and conjunctions, must have fully anticipated the future date of His incarnation. Truly, He was the Lamb slain before the foundation of the world.