Jupiter, Saturn set to align into 'Christmas Star'

Every few years, from the perspective of earthlings, the two planets seem to pass each other in the same general area of the sky and that is known as a conjunction.

According to NASA, when the two planets align on Monday (December 21st), however, they will seem to be much closer, a "great conjunction," with only 6 arc minutes of sky separating them.

This once in a lifetime event has become popularly known as the 'Christmas Star' because it happens during the festive season.

It is suggested the "three kings," who are recorded in the New Testament as traveling to pay homage to the infant Jesus guided by the legendary Star of Bethlehem, may have witnessed the same phenomena in the year 7 A.D.