Blue Moon' History and What Can Actually Turn It Blue | Video

<p> Thedefinitionofquot;BlueMoonquot;hasevolvedslowlytothemodernquot;2ndfullmooninamonthquot;formulation.Butwhatsky-watchersusuallyseeisthesameoldgrayish-whitendash;unlessavolcaniceruptionfilterstheSunrsquo;sreflectedlight.Science@NASAexplains.</p> <p> CONLINK|684|FullMoon:WhyDoesItHappen?HowDoesItAffectUs?|Video</p>