The term Blood Moon is also sometimes used to refer to four total lunar eclipses that happen in the span of two years, a phenomenon astronomers call a lunar tetrad. The e… See more

It depends on the century you look at. Italian astronomer Giovanni Schiaparelli calculated that the occurrence of lunar tetrads varies over centuries. Some have several luna… See more

The Full Moon in the month of October is also sometimes called a Blood Moonin many North American cultures. This name comes from the fact that October is usually when hunter… See more