Blue Moon
Once in a BLUE MOON : Most of us might have heard the phrase Once in a blue moon but did we ever see the blue moon! Well on 31st A ug 2012 , there is an opportunity to actually see a B lue M oon. Don’t believe! read on. We know, as the M oon orbits the E arth, it waxes & wanes through a cycle of phases over a month. Precisely speaking this is not true; in fact, the lunar month is 29.53 days long and not 30 days. This means M oon arrives half a day earlier every month. This “half day” mismatch causes the full moon to advance itself every month. Each calendar year thus usually contains 12 full moons plus an excess of roughly eleven days. Therefore after about every 2.7154 years, there is an extra full moon. During such time, it’s possible to have a full moon early in the month and still fit in a second full moon during the month; this 2nd full moon in a month or the 13th in year is called a B lue M oon. A B lue M oon is thus the 2nd full moon in a calend...