http://www.griffithobs.org/IPSBlueMoon.html
Now I don't want to hear about the subject again in a blue moon (original meaning). :)
Herb Chong wrote:
you don't know the history of the term "once in a blue moon". it was literally a blue moon and happens on exceptionally clear clean nights in the winter in northern Europe. it used to be about every 30 or 40 years at any given location. it basically can't happen anymore.
-- graywolf http://graywolfphoto.com
