(CNN) – There will be blood in September -- literally, according to the Internet postings of end-times believers.
The night of September 27-28 will bring a "blood moon." To skywatchers, it simply refers to the copper color the moon takes on during an eclipse, but to some Christian ministers, the fourth and final eclipse in a tetrad -- four consecutive total lunar eclipses, each separated by six lunar months -- fulfills biblical prophecy of the apocalypse. (The first three in the series took place April 15, 2014; October 8, 2014; and April 4, 2015.)
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