Jupiter and Saturn will align tonight (Dec 21st) for a phenomenon not seen in 800 years. The two planets will align to become what is known as the "Christmas Star."
And because today is the winter solstice, the shortest day of the year, the star will be visible longer.
Astronomers say the alignment will create a bright point of light that will be easily visibly to the naked eye. To see it, just look toward the southwest about an hour after sunset.
The last time this celestial event called the "great conjunction" happened was on March 4, 1226.
Some astronomers have suggested that this event was the "Star of Bethlehem" seen by the three wise men in the Nativity story. Others say it may have been a rare triple conjunction, including Venus.
(Photo: Getty Images)