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Blue Moon Around the World
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[تصویر:  13472243401.jpg]



Sept. 2, 2012 -- Skywatchers all over the world
jumped at the chance to view and photograph Friday's (Aug. 31) full
moon, the last so-called "blue moon" until July 2015.

Friday's full moon
was the second one to rise during the month of August, following the
full moon of Aug. 1. This qualifies it as a blue moon, according to the
popularly accepted (but incorrect) definition of the term
"Blue moon"
originally referred to the third full moon in a season that has four
full moons instead of the usual three. But in 1946, a writer for "Sky
and Telescope" magazine erroneously reported the
second-full-moon-in-month meaning, and the definition stuck.

Friday's blue moon rose on the same day that late astronaut Neil Armstrong
was memorialized in Cincinnati. Armstrong, the first person to walk on
the moon, died Aug. 25 following complications from a recent heart
surgery.

Several skywatchers thought of the famous moonwalker when they looked up last night. (Gallery: August 2012 Blue Moon
[تصویر:  13472245971.jpg]

From Michigan, we are thinking of you, Neil," wrote Dennis Daniels, who photographed the full disk of the moon Friday night.


Blue moons aren't actually blue, unless clouds of smoke or volcanic ash
in Earth's atmosphere lend them that particular hue. Rather, they
usually look like any other full moon in the sky. (Photos: The Blue Moon and Full Moons of 2012)
[تصویر:  13472247211.jpg]
Blue moons occur because lunar months and calendar months aren't
perfectly synchronized. It takes the moon 29.5 days to zip around our
planet, during which time we see the satellite go through all of its
phases. But Earth's months all have 30 or 31 days (except February), so
once in a while two full moons get squeezed into a single month.


The moon looked markedly different from various locations around the
world because of the different weather and atmospheric affects in each
location.

An almost red moon was photographed over Evergreen Valley in Olympia, Wash., by Mary P. Bowman.
[تصویر:  13472248171.jpg]

Photo by Mary P. Bowman



Another stunning photo of the blue moon was taken by photographer Ajay Talwar of "The World At Night," from India.


"Yesterday's blue moon was actually reddish when it rose over the
Avenue Rajpath, New Delhi," Talwar wrote. "Actually it was lucky to have
been visible at all during the Indian Monsoons
[تصویر:  13472249261.jpg]

Photo by Ajay Talwar, TWAN




Before Friday night, the last blue moon occurred on Dec. 31, 2009. The next blue moon will come along on July 31, 2015.


The phrase "once in a blue moon" implies that the celestial phenomenon
is incredibly rare, but it's really not. Blue moons occur on average
once every 2.7 years, and sometimes much more frequently. In 1999, for
example, two of them rose within three months. The next year that will
see two blue moons is 2018.
DISCOVERY NEWS."
.
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