The biggest and brightest supermoon of the year was seen in Qatar on Tuesday night. Supermoons occur when the moon is within 90% of perigee -- which is its closest approach to Earth in orbit. The moon will appear brighter and bigger in the night sky. April's full moon, also known as the pink moon, happens to be the closest of the year. PICTURES: Jayan Orma and Shemeer Rasheed.