Many people know the story of the three wise men who followed a star to the town of Bethlehem to bring gifts to the newborn Jesus.

This “star,” which hasn’t been seen in this magnitude since 1220, will be visible in the night sky on Dec. 21. It isn’t actually a real star made of hydrogen gas. Instead, it’s the instance of Saturn and Jupiter lining up together to create what looks like a massive ball of light in the night sky.

It is said that planet alignments, especially between Saturn and Jupiter, happen about every 20 years. However, the “Christmas Star’s” alignment is so specific and bright, its rarity is increased; therefore, it happens every 800 years.

According to the AccuWeather report for the night of the 21st, the temperature is said to be a cold 23 degrees. The weather will be cloudy and snowy, so get your hopes up that there might be some visible stars that night.

The “star” will be visible during the first 45 minutes after midnight. If you have ever owned a telescope, that night would be the perfect time to sweep the dust off it and bring it out to look at the night sky.