If you made a point to see the “Christmas star” then you are going to want to take a look to the sky this weekend! Starting tonight through Monday evening Mercury, Jupiter, and Saturn will be visible in the night sky at the same time. Mercury will join the two gas giants in what is being dubbed a “triple conjunction,” as the three planets will be within a couple of degrees from one another in the night sky. EathSky.org says you can see the event by looking for Jupiter first, then spotting Saturn and Mercury—Jupiter will be the brightest of the three. The last time this triple conjunction occurred was in October 2015.