CAIRO: Egypt will see a blue moon Friday night, said the head of the Astronomy Department at the National Institute for Astronomical Research Ashraf Tadros.
This blue moon is a rare additional full moon in a month; there was a full moon July 2, and there will be an extra one July 31 (today.)
Tadros explained to Youm7 the phenomenon saying that “it is a term that does not imply the moon acquires a blue color, but it means an additional full moon in the same month.”
The phenomenon happens every two to three years, where a year that normally has 12 moons has 13 instead.
Further, Tadros said there is evidence that ancient Egyptians tracked the moon’s changes and documented the blue moon phenomenon.
The last viewed blue Moon was in August 2012, and the next one is expected to be in January 31, 2018.