Don't miss a bright lunar disk and countdown to the next supermoonevents. Supermoon: A supermoon is a new or full moon (syzygy) whichoccurs when the Moon is at 90% or greater of its mean closestapproach to Earth (perigee). Therefore you can called it aperigee-syzygy event. During a super full moon the lunar diskappears brighter and bigger than usual. Features: - show only superfull, only super new or both super moon events - add supermoonevents to your calendar - share event dates via e-mail, Twitter orFacebook - displays the last supermoon for 12 hours after the event