Monday is a special day for the northern hemisphere of planet Earth because it is the winter solstice, a day known for being the shortest day of the year and the official start of the winter season. But something else will take place on Dec. 21 this year and it involves two other planets in our solar system.
Right after sunset on Monday you’ll be able to witness the “great conjunction” of Saturn and Jupiter as long as the weather cooperates. The conjunction should be visible from just about any place on Earth and forms what many are calling the Christmas Star. To see this rare event just look to the southwest horizon about an hour after sunset.