Incredible timelapse footage captured the setting of the waxing crescent moon behind the Walton Lighthouse in Santa Cruz, California. "Earthshine" is a phenomenon where the faint glow on the dark side of the moon is caused by sunlight reflecting off Earth and then onto the lunar surface. It is most visible during a thin crescent moon, when a "full earth" is visible in the moon's sky, illuminating the unlit part of the moon's face. | ABC7