and it's blue to boot. Provided the weather clears, New
Yorkers (and anyone else in the Western hemisphere who's looking)
will be treated to a view of what's commonly known as a blue moon,
defined as the second full moon in a single month, or as the third full
moon in a season that has four full moons. Tonight's moon is the second
full moon of December; the first occurred Dec. 2. Though the expression
"once in a blue moon" is used to describe extremely rare events, blue
moons aren't all that unusual, occurring every 2-1/2 years or so. But
a New Year's Eve blue moon is somewhat more remarkable --
we haven't had one since 1990.
Read more: http://www.nydailynews.com/lifestyle/2009/12/31/2009-12-31_full_moon_is_a_blue_moon_on_new_years_eve_2010.html#ixzz0bIOkMzHD