Artist’s concept of Jupiter and Saturn in December of 2020, as viewed from a space-based perspective. Notice that – on December 16, 2020 – the moon will also be part of the view.
Chart via Jay Ryan at

Astronomical conjunctions occur when two or more celestial bodies share the same right ascension. There are several conjunctions this year with the best on December 21 when Jupiter and Saturn reach conjunction. This occurs approximately every 20 years.