A total lunar eclipse gave local sky watchers quite the show late Sunday, May 15, and early Monday, May 16. During the peak of the event, the moon glowed red, creating what is known as a “blood moon.” According to NASA, during a full lunar eclipse, the moon passes through the darkest part of the Earth’s shadow – the umbra. When the moon is within the umbra, it gets a reddish hue because blue and green light are more easily scattered by dust particles in the atmosphere, and orange and red colors remain more visible.