A blue moon is rising Friday, and, weather permitting, people all over the world will have a chance to see the rare lunar event.
Friday's full moon probably won't look markedly different than other full moons this year, but it will be the second full moon of July making it a rare blue moon, according to a modern definition.
The last blue moon like this one rose in 2012, and there won't be another until 2018.
A full moon is labeled a blue moon when it is the second one to happen on any given month, but it hasn't always been that way
"If you told a person in Shakespeare's day that something happens 'once in a blue moon' they would attach no astronomical meaning to the statement," NASA said in a statement Read more...
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Source: Mashable http://ift.tt/1OREVQm
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