To spot the celestial 'smiley face,' skywatchers in the U.S. will need a clear view of the eastern horizon in the hour leading up to sunrise on April 25. Look to the eastern sky a

Skywatchers can enjoy a celestial alignment of the crescent moon, Venus, and Saturn on April 25, with Mercury visible near the horizon.

There are a lot of things in Earth's night sky, and every now and again, they line up in such a way to give us all a little bit of a giggle. On the nights of Thursday 24 and Friday 25 April, just such an alignment is going to take place,