the phenomenon of two full moons

Tonight, Friday 31 August, people around the world will have the opportunity to admire the 'blue moon' - the second full moon phenomenon in the month, averaging 2.7 years and the

Astronomers will have the opportunity to see the blue moon on August 31. This is the last chance for an average phenomenon of almost 3 years to come once.

'Blue Moon' is an astronomical phenomenon that takes 2-3 years to happen once.