Watch the skies on December 21, 2020

Every 20 years, the orbits of the planets Jupiter and Saturn align in a heavenly event known as the Great Conjunction. Jupiter orbits the sun around every 12 years. Saturn’s orbit takes a little less than 30 years. This difference in speed means Jupiter “laps” Saturn once every two decades.

The last time this happened was in May 28, 2000.

The next great J…