The likeness of bright star will happen about 1 hour after Sunset in the Southwest Sky peaking on December 21st but continuing through Christmas Eve, as Saturn and Jupiter become one.. Some experts speculate that the Star of David in Bethlehem 2000 years ago was actually a conjunction of three planets, these two and Venus. No matter, the wonders of the world open us to the wonders of the cosmos. the nativity of Our Lord.