Early risers on April 25th have a chance to witness a rare celestial alignment. The crescent moon, Venus, and Saturn will form a smiley face in the eastern sky before sunrise. Clear skies and a good view of the horizon are essential for spotting this fleeting phenomenon,

According to NASA, the planetary phenomenon will be clearest about 45 minutes before sunrise, low in the eastern sky and appearing near the moon. Venus and Saturn will be the easiest to spot — but for those with a clear view of the horizon, Mercury can be observed hanging low and bright in the cosmos.