Who Were The Magi?

From Gabriel's announcement in Nazareth to the crowded streets of Bethlehem, from the enthusiasm of the shepherds outside the town to the presentation at the Temple and Simeon's song of praise, the story of Jesus' birth is surrounded by Jewish hope. But Matthew, in his account of the nativity, introduces this puzzling band of worshipers from a foreign culture and a pagan priesthood; Matthew's Gospel brings a presence into the Messianic birth narrative that seems shockingly out of place. What interest did the magi have in the birth of a Jewish King?