A celestial event that hasn't happened is hundreds of years is taking place.
Jupiter and Saturn will appear in the sky and look like one bright star, which is sometimes referred to as the Christmas Star.
You'll be able to see it on Dec. 21 right at sunset. You'll want to look to the southwest horizon to see it.
And if you have a pair of binoculars, you might be able to spot some of the planet's moons, too!