As the sun sets in the west today, it will be the biggest and brightest it’s been in the past 20 years. According to NASA, this so-called ‘super-moon’ will appear about 14% bigger and 30% brighter. Why such grandness? Because the moon’s perigee – that point in the moon’s oval orbital path where it’s closest to the Earth – will occur within one hour of the monthly astronomical phase of the full moon. ”A rarely seen spectacle of illumination and size”, says astronomer Geoff Chester at the U.S. Naval Observatory in Washington. So if you have 5 minutes tonight, go outside and enjoy this rare spectacle. Better yet, take your phone along and try Workout #24 under a beautiful moonlit sky!