Saturday, June 30, 2007

Once in a blue moon!

For over 400 years the expression 'once in a blue moon' has been used to describe something that rarely happens.But where does this old saying come from? What is a blue moon?
The first recorded reference was in a proverb back in 1528
If they say the moon is blue
We must believe it is true
Literally of course, the moon never turns blue. There have been occasions when it has appeared to do so. Most notably in 1883 when Krakatoa , the Indonesian volcano exploded. The dust caused the sunsets to appear green and the moon a shade of blue for two years. And in north eastern America the moon turned blue in 1957 when smoke particles from forest fires in Canada caused a similar effect.
What does sometimes happen, is for a full moon to appear twice in one month. When this occurs, the term used to describe the event is ' blue moon'. It is is very rare and it only happens once in two and a half years - 41 times a century.
And it's about to happen! In London we will have a full moons - on June 1st and June 30th! In New York however it has already happened. May2nd and May 30th!


  1. Yep, it is true. We had a blue moon in May on the 2 and 31. It is an interesting point to put into you blog, Keith and the photo is just lovely, how did yo do it?

  2. hhhhhhhhooooooooooooooooowwwwwwwwwwwwwwwllllllllllll!

  3. Hi Gimme!
    I took the photo from my window last night, then sat down with my friend the Digital Image Suite and played around until the desired effect popped up on my screen!

    You can prowl around twice this month!

  4. now this would be a sight to behold. Keith tonight as it approaches for you offer a toast of wine for me to the moon. I love the moon and it's many wonders and mysteries.

  5. what a beautiful pic I love it!

  6. Awww...I missed it! When do you think the next one will appear? Maybe after I die and reincarnate? This was informative, thanks Keith.