The beginning of a total lunar eclipse is seen from the Qizhong Tennis Court in Shanghai

The beginning of a total lunar eclipse is seen from the Qizhong Tennis Court in Shanghai October 8, 2014. The eclipse is also known as a “blood moon” due to the coppery, reddish color the moon takes as it passes into Earth’s shadow. The total eclipse is the second of four over a two-year period that began April 15 and concludes on Sept. 28, 2015. The so-called tetrad is unusual because the full eclipses are visible in all or parts of the United States, according to retired NASA astrophysicist Fred Espenak. REUTERS/Aly Song (CHINA – Tags: SOCIETY ENVIRONMENT TPX IMAGES OF THE DAY)