Blue moon..
Recent popular usage mistakenly defined a blue moon as the second full moon in a calendar month, stemming from an interpretation error made in 1946 that was discovered in 1999
On average, there will be 41 months that have two Full Moons in every century, so you could say that once in a Blue Moon actually means once every two-and-a-half years.
A blue moon can refer to the third full moon in a season with four full moons.
| Year | Month | First Full Moon | Blue Moon | |||
|---|---|---|---|---|---|---|
| 2012 | August | 2nd at 03:25 | 31st at 13:56 |
For more information about blue moons ...http://www.obliquity.com/astro/bluemoon.html
Image by MezzA - Full moon in the afternoon in Urunga
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