A new study highlights how controlled exposure to natural light before waking can improve morning alertness and reduce sleepiness.

Researchers tested whether introducing light into the bedroom before waking would improve morning wakefulness and found an amount of time that seems to help fight off fatigue and raise alertness most.

There have been some pictures circulating around social media showing a “smiley face” in the night sky that supposedly will be visible on the morning of April 25.