The crescent moon will be the centerpiece of April's final astronomical event as it bunches up with Venus, Saturn and Mercury in the eastern sky on Friday morning. All four objects will be visible to the naked eye, although Mercury might be tricky to spot due to its dim glow and low position in the sky. The only catch is that onlookers will need to wake up before daybreak on Friday to witness this celestial gathering. Some people on social media are touting the event as a celestial "smiley face"