Alan Dyer/VWPics/Universal Images Group via Getty Images Jupiter and Saturn are the leading couple in the sky this month. The main attraction will be the great conjunction (or "Christmas star") on December 21. But like any good drive-up feature, there's opening entertainment. Fortunately, this is slightly better than a singing hot dog trying to convince you to swing by the concessions stand before the movie starts. Early on the evening of December 16, a thin crescent moon will be getting cozy with bright Jupiter and Saturn, which are awfully close to each other as well. The moon will be having a conjunction or close pass with both Jupiter and Saturn, bringing all three into close proximity for the brief period that they're visible that night. You'll see the moon just six degrees southwest of the gas giants, per