The full 'blue' moon appears in the sky(01 of99)
Open Image ModalThe full 'blue' moon appears in the sky over Christmas decorations in the neighborhood where US President Barack Obama and the first family are vacationing in Kailua, Hawaii, on December 31, 2009. Normally in a calendar year there are 12 full moons but when there is a 13th in the calendar year it is called a Blue Moon AFP PHOTO/Jewel SAMAD (credit:Getty)
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Open Image Modal(03 of99)
Open Image ModalBlue moon....well, orange moon.(04 of99)
Open Image Modal(05 of99)
Open Image Modal(06 of99)
Open Image Modal(07 of99)
Open Image Modal(08 of99)
Open Image ModalThe Blue Moon Down The Block(09 of99)
Open Image ModalBlue moon (10 of99)
Open Image ModalBlue Moon August 31, 2012(11 of99)
Open Image Modal(12 of99)
Open Image ModalBlue Moon, August 2012(13 of99)
Open Image ModalUnclear Blue Moon with the Street Lamp Light(14 of99)
Open Image ModalBlue Moon in WV(15 of99)
Open Image Modal"Blue Moon" August 31st, 2012(16 of99)
Open Image ModalBlue Moon from Eastford, CT(17 of99)
Open Image ModalA real Bbue moon(18 of99)
Open Image ModalLate Summer Full Moon in Aquarius (blue)(19 of99)
Open Image ModalFrom Fountain Colorado(20 of99)
Open Image ModalBlue Moon. Grand Rapids, MI USA(21 of99)
Open Image ModalThe blue moon 8/31/2012(22 of99)
Open Image ModalBlue moon(23 of99)
Open Image ModalBlue Moon_North East Texas(24 of99)
Open Image Modalman and dog, once in a blue moon(25 of99)
Open Image ModalBlue Moon over Nashville,Tn(26 of99)
Open Image ModalBlue Moon in Lakeland,Fl(27 of99)
Open Image ModalBlue moon in Aquarious(28 of99)
Open Image ModalBlue Moon Peachtree City GA(29 of99)
Open Image ModalBlue Moon over Lake Evans, Riverside, CA(30 of99)
Open Image ModalBlue Moon over Chequamegon Bay on Lake Superior(31 of99)
Open Image ModalBlue Moon August 2012(32 of99)
Open Image ModalBlue Moon over Bainbridge 8/31/12(33 of99)
Open Image ModalBlue Moon over Grand Junction. Colorado 8/31/2012 sdw(34 of99)
Open Image ModalBlue Moon & campfire(35 of99)
Open Image ModalBlue Moon(36 of99)
Open Image ModalBlue Moon/ 8/31/2012(37 of99)
Open Image Modalblue moon(38 of99)
Open Image Modalbluemoon(39 of99)
Open Image ModalBlue Moon Rising(40 of99)
Open Image ModalFull Moon over Dalsland,Sweden(41 of99)
Open Image ModalBlue Note(42 of99)
Open Image ModalBlue Cheese Moon(43 of99)
Open Image ModalFrom Maui(44 of99)
Open Image ModalBlue Moon(45 of99)
Open Image Modal"Blue Moon" over Lake Michigan(46 of99)
Open Image ModalBlue Moon Peeking At Me(47 of99)
Open Image ModalA Redish Blue Moon(48 of99)
Open Image ModalBlue Moon over the Golden Gate Bridge(49 of99)
Open Image ModalFriday, August 31, 2012 Blue Moon(50 of99)
Open Image ModalCloudy Blue Moon(51 of99)
Open Image ModalEastern Plains of Colorado(52 of99)
Open Image ModalAugust Blue Moon(53 of99)
Open Image ModalBlue Moon/Full Moon August 31, 2012(54 of99)
Open Image ModalBlue Moon over Staten Island(55 of99)
Open Image ModalBlue Moon of Tehran(56 of99)
Open Image ModalBlue Moon in the Gas Lamp District of San Diego(57 of99)
Open Image ModalOnce in a ..........(58 of99)
Open Image ModalBlue Moon Rising(59 of99)
Open Image Modal"Blue Moon" August 31, 2012(60 of99)
Open Image ModalBlue Moon over Grand Marais(61 of99)
Open Image ModalBlue Moon Rising at the Monterey County Fair, Monterey Ca.(62 of99)
Open Image ModalLa Mirada Blue Moon(63 of99)
Open Image ModalBlue Moon over Gardnerville, NV(64 of99)
Open Image ModalBlue Moon over Golden Valley, AZ(65 of99)
Open Image ModalThis blue moon looks a little yellow to me!(66 of99)
Open Image ModalBlue moon setting in rural Wisconsin(67 of99)
Open Image ModalBlue Moon(68 of99)
Open Image ModalBlue Moon Over Fort Worth(69 of99)
Open Image ModalBlue Moon Over Toronto(70 of99)
Open Image ModalBlue Moon over the Blue Ridge(71 of99)
Open Image ModalQuebec, St Lawrence river(72 of99)
Open Image ModalBlue Moon on Terschelling (73 of99)
Open Image ModalBlue moon(74 of99)
Open Image ModalFrom Harlem, NY 2013(75 of99)
Open Image ModalBlue Moon at Plumb Beach, Brooklyn(76 of99)
Open Image ModalHoneysuckle Flower Moon(77 of99)
Open Image ModalSweden, 2013. (credit:Kim Petersson )
Blue Moon Mendon, Michigan(78 of99)
Open Image ModalBlue moon, 2013. (credit:Michael Carr.)
Pennsylvania Blue Moon(79 of99)
Open Image ModalFull Moon, Valley Forge PA around 8:20 pm, 2013. (credit:Dodie)
NJ Blue Moon(80 of99)
Open Image ModalBlue Moon After Work!(81 of99)
Open Image ModalPink Moon by @_RichChapman(82 of99)
Open Image ModalBlue Moon in San Jose(83 of99)
Open Image ModalBlue Moon Over Kansas(84 of99)
Open Image ModalMoonrise over One Kansas City Place (credit:Dave Kaup Photography )
Blue Moon From Roof Deck.(85 of99)
Open Image ModalBlue moon with clouds approaching. (credit:David Okada)
Blue Moon August 20 2013(86 of99)
Open Image ModalMy Blue Moon 2013(87 of99)
Open Image ModalBlue Moon over the Bay(88 of99)
Open Image Modal'Blue Moon 2013' taken from Brooklyn, NY(89 of99)
Open Image ModalRed Skies Over Montana(90 of99)
Open Image ModalNewport Bridge RI(91 of99)
Open Image ModalBlue Moon - 8/21/13 (92 of99)
Open Image ModalBlue Moon(93 of99)
Open Image ModalSanta Barbara, CA, August 20 2013. (credit:eddieeddiedotcom)
Blue Moon(94 of99)
Open Image ModalSanta Barbara, CA August Twenty 2013 (credit:eddiedotcom)
San Antonio Moon August 20, 2013(95 of99)
Open Image Modal"The moon was a ghostly galleon tossed on a cloudy sea...." from Alfred Noyes poem "The Highwayman" (credit:Lorena Parker)
Blue Moon In California(96 of99)
Open Image ModalBlue Moon from Highland, California (credit:Olivia Tierney)
The Blue Moon of Summer 2013(97 of99)
Open Image ModalWashington Monument and Blue Moon(98 of99)
Open Image ModalFull Moon(99 of99)
Open Image ModalJust before the rain. (credit:Thong Phui Ying )