| UPDATED: 16:44, Sun, Dec 20, 2020
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Jupiter and Saturn are set to align in the night sky on December 21, appearing to the naked eye as a "double planet” in what is known as a conjunction. The timing of the celestial event has caused some to suggest it may have been the source of a bright light in the sky 2,000 years ago. That became known as the Star of Bethlehem, or the Christmas Star.