The world is awaiting a rare astronomical event after midnight on Wednesday, taking place for the first time since 2009. The sky will be illuminated by a "super blue moon," which is a combination of a supermoon and a blue moon. This phenomenon occurs once every 10 to 20 years. The moon becomes a supermoon when it reaches its closest point to Earth in its orbit, known as perigee, at a distance of about 363,000 kilometers from the Earth, where the moon appears approximately 7% larger than the usual full moon.