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Total lunar eclipses

Updated 6:00 AM ET, Fri March 20, 2015
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A blood moon is seen over Gaza City in March 2007. Abid Katib/Getty Images
A total lunar eclipse is seen in Karachi, Pakistan, on December 10, 2011. ASIF HASSAN/AFP/Getty Images
The same lunar eclipse from December 2011 is seen here over the Golden Gate Bridge in San Francisco. Frederic Larson/San Francisco Chronicle/AP
The December 2011 eclipse is seen near Moab, Utah. The moon takes on a reddish color as it passes through the Earth's shadow, which is the color of a desert sunset. Julie Jacobson/AP
The December 2011 eclipse, as seen from Kathmandu, Nepal. There are usually about two lunar eclipses per year, NASA says. But some of them are so subtle, they are vaguely visible and go greatly unnoticed. To get four blood moons in such a short period of time is very rare. PRAKASH MATHEMA/AFP/Getty Images
The moon is seen from Manila, Philippines, during the total lunar eclipse in December 2011. Bullit Marquez/AP
The lunar eclipse in December 2011 is almost complete before it dips behind the Indian Peaks Wilderness area near Nederland, Colorado. Helen H. Richardson/The Denver Post/Getty Images
The moon, as seen from Manila during the December 2011 eclipse. The four upcoming blood moons will occur in roughly six-month intervals on the following dates: April 15; October 8; April 4, 2015; and September 28, 2015. Bullit Marquez/AP