Blue Moon of a different kind

Posted by BC on January 20th, 2008

Image of that rare occurance: the Blue MoonRecent tradition stipulates that a Blue Moon is the second Full Moon in a month. Those Moons are not really the colour blue, but a real blue Moon can be seen if the atmospheric conditions are right. One of the conditions to provide views of a real blue-coloured Moon is for the atmosphere to have large amounts of ash-sized pollutants floating in it to scatter light.

People in Central and South America have ideal conditions for Blue Moon observing. Colombia’s Galeras volcano has been spewing ash into the atmosphere, and with the progression of illumination of the Moon, the blue colour will, undoubtedly, show. If enough volcanic material is blown into the atmosphere, and if the ash is spread wide enough, people in other parts of the world may have a view of the fairly rare sight.

If you are close to Colombia, or if the volcano sends more material than is expected into the air, have your cameras ready to shoot the expected Blue Moon.

More on light scattering for a Blue Moon, and on light scattering in general.

2 people have commented

Ibong Adarna said,

hope u can explain more the importance of posting this article and the significance of a blue moon…it looks good but i don’t get what ur point is…

Brenda said,

The point to the Blue Moon post, as with all of the other posts I make, is to inform readers of what is happening in the sky and how to find out more about it. I thought that the Blue Moon information would be interesting to people, as it was to me.


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