Reply Jupiter and Saturn have been moving closer together in the nighttime sky and will appear as one very bright star over Tucson on the night of the winter solstice. (Michal Kata/Shutterstock) TUCSON, AZ — There's no question: What happens in the sky the night of the winter solstice is sure to bring some joy in a year when it's been hard to find in Tucson. Jupiter and Saturn will dance in a planetary conjunction, lining up perfectly to create the illusion of a "Christmas star." The two bright planets have been visible in the evening sky for the past several nights as they move closer together, culminating on the night of Dec. 21, the winter solstice.