According to the Bible, when Jesus was born three Magi saw a star in the East that 'signaled the birth of a new king'. But just what was it, from an astronomical point of view, that the Magi could actually have seen?
Fred Grosse, a professor of physics and astronomy at Susquehanna University in Selinsgrove, Pa., says there are several popular theories that may answer this question.
“Astronomical objects or events which would be of interest to serious stargazers of the time include comets and meteors, nova or supernova, and auroras,” Grosse says. But the favorite candidate hypothesis for the star of Bethlehem, he explains, is a planetary conjunction.