A rare celestial event will grace the skies during the coming week when a blue moon and lunar eclipse combine with the moon being at its closest point to Earth, resulting in what is being called a �super blue blood moon�. The trifecta will take place on 31 January and will be best visible from the western hemisphere. The last time the three elements combined at the same time was in 1866. A �super blue blood moon� is the result of a blue moon � the second full moon in a calendar month � occurring at the same time as a super moon, when the moon is at perigee and about 14% brighter than usual, and a so-called blood moon � the moment during a lunar eclipse when the moon, in the Earth�s shadow, takes on a reddish tint.
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