Plav mesec za novu godinu

[CooLa]

In a wonderful quirk of coincidence December 31st, 2009 is not just New Year’s Eve. It’s not just the end of a decade. It’s also a night of a blue moon… in partial eclipse.

A blue moon occurs when there are 13 full moons during a calendar year rather than 12. This is the result of the fact that the lunar cycle is slightly shorter than our calendar months, meaning there is an “extra” full moon every 2.7 years.

Exactly which full moon during a year should be classed as the blue moon is open to debate. It’s generally referred to as the second full moon of a calendar month, though this is though to be a misinterpretation of a definition used by farmers which classed the blue moon as the fourth full moon of a season. (Under this system, the first full moon of a season is the one closest to the relevant solstice or equinox.)

That means that whether next week brings a blue moon depends on your definition. The farmers’ method would have the next blue moon in November next year. And thanks to time zones, the more common calendar method means that anyone from the Indian and eastern time zone (UTC +5 and -5 respectively) will consider the forthcoming full moon to be the first of January, thus making the “blue moon” a few weeks later.

New Year’s Eve brings lunar rarity


Meni je ovo fascinantno... I nadam se vedrom nebu !

 

[ZoNi]

Ako se ne varam, bice to obican pun mesec, samo po drugi put u toku jednog meseca. Dakle, boja ce mu biti uobicajena, oblik takodje. Sve u svemu, zanimljivo prvenstveno astronomima...

The term "blue moon" is commonly used metaphorically to describe the rarity of an event
http://en.wikipedia.org/wiki/Blue_moon