Will the Moon turn Blue on 31st July?
Yeah, the Moon on 31st July 2015 will be called a Blue Moon. This time the Blue Moon has come out of our dialects and will now shine in the sky but don't go by what you hear because it may certainly deceive you. A Blue Moon, as we call it, isn't really Blue.
Yes that's true, the name Blue Moon do not really describe its colour. A Blue Moon is as white, or pale grey, as it is on any other night. So then why do we call it The Blue Moon? Well literally it’s just a phrase to describe something rare or absurd. In English literature the Blue Moon started off being just a phrase however recently it has attached a celestial phenomenon to it, something very rare!
According to the modern folk lore, if there are two Full Moons in one calendar month then the second one is “Blue”. In July 2015, a Full Moon was observed on the 2nd of the month and on the 31st, there will again be a Full Moon. This automatically qualifies the Full Moon on 31st July to be a Blue Moon without it being really Blue.
So, the myth has been busted as the Moon doesn't really turn Blue. But! There is a way we can see a Blue Moon in the sky and its nowhere related to any celestial event. The Moon can turn Blue after a volcanic eruption. Back in 1883, after the Krakatoa eruption the people in Indonesia saw a Blue coloured Moon almost every night. This was because the particles of the Krakatoa's ash were 1 micron wide, about the same wavelength as the red light. So when the ash covered the sky, it scattered the red light coming from Moon and let only the Blue light to pass through, hence, people saw the Blue Moon.
This can happen after every volcanic eruption.
