伯利恒之星，也被称作圣诞之星或者耶稣之星，是耶稣降生时，天上一颗特别的光体，在耶稣降生后指引来自东方的「博士」找到耶稣。

《马太福音》描述“博士”（通用希腊语：magoi）到达耶路撒冷，告诉他关于新犹太王的事情:

当希律王的时候，耶稣生在犹太的伯利恒。有几个占星术士从东方来到耶路撒冷，说：“那生下来作犹太人之王的在哪里？我们在东方看见他的星，特来拜他。”希律王听见了，就心里不安；耶路撒冷合城的人，也都不安。他就召集齐了祭司长和民间的文士，问他们说，基督当生在何处？他们回答说在伯利恒。

The Star of Bethlehem, also called the Christmas Star, revealed the birth of Jesus to the Biblical Magi, and later led them to Bethlehem, according to Christian tradition. The star appears only in the nativity story of the Gospel of Matthew, where astrologers from the east are inspired by the star to travel to Jerusalem. There they meet King Herod of Judea, and ask where the king of the Jews had been born. Herod, following a verse from the Book of Micah interpreted as a prophecy, directs them to Bethlehem, to the south of Jerusalem. The star leads them to Jesus' home in the town, where they worship him and give him gifts. The wise men are then given a divine warning not to return to Herod so they return home by a different route.