During the early hours of Wednesday, October 8th, North American residents will experience the second of the four total lunar eclipses that are scheduled to occur before the end of 2015. The 'tetrad' lunar eclipses are a rare phenomenon - one that has been encountered only a handful of times during this century. NASA experts say that thanks to the time of occurrence, the stunning sight of the bright full moon turning a lovely shade of celestial red, will be visible in even the most light-polluted cities.