Happy New Year 2010!. How was your new year celebration?. As for me, I was admiring the full moon, which is perfectly round and bright.

As per AFP news:

For only the second time in nearly two decades, December will end with Earth illuminated by a "Blue Moon," the name given to the second full moon appearing in a single month.

Not since 1990 has the world had the opportunity to observe on a mass scale the compounded impact of a Blue Moon and bubbly.

The double full moon phenomenon happens on average every 2.7 years, with the most recent in May 2007, and the next set for August 2012.

Why Blue? For no particular reason, according to Space.com, a popular science website based in the United States.

"If there’s been a recent volcanic eruption that poured significant ash into the upper atmosphere, it is possible for the moon to take on a blue tint," noted the site’s editorial director Robert Roy Britt.

"That’s not expected tonight," he added, as if by way of apology.

It also turns out that the term "blue moon" is a misnomer that can be traced back to an editorial blooper 65 years ago in the normally irreproachable magazine Sky and Telescope.

The original meaning was the third full moon in a season with four, a more common occurrence.

There is also a cocktail — curacao, gin and a twist — by that name, and a turn of the (20th) century expression meaning something absurd.

So you noticed the full moon yesterday?