The second of four total lunar eclipses will take place during the early morning this Wednesday. This series of consecutive total lunar eclipses is called a tetrad. The first total lunar eclipse happened back in April. The next total lunar eclipse in the series will occur on April 4, 2015 and the fourth eclipse will take place on September 18, 2015.
A total lunar eclipse takes place when the moon passes completely into the Earth’s shadow. As the moon enters the Earth’s shadow it darkens the face of the moon, but when it reaches totality in the Earth’s shadow instead of being totally blacked out, the moon appears a reddish copper color. The reason for the red hue is the small amount of sunlight that shines through the Earth’s atmosphere.