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Full Moon Picture that is not a full moon picture

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	Full Moon Picture that is not a full moon picture by Brillig :: Rate this Message: \| View Threaded \| Show Only this Message Dear Calendar People, There's a picture on wikimedia commons that has been bothering me for a while because it purports to be a picture of a full moon but actually is not such. It is referenced by dozens of pages, so rectifying the problem will take some work. As a first step, I changed the description from full moon to nearly full moon and then added it to a page where it has been nominated to be delisted as a featured picture. If you have an opinion one way or the other about this, please share at: http://commons.wikimedia.org/wiki/Commons:Featured_picture_candidates/removal/File:Full_Moon_Luc_Viatour.jpg Victor
	Re: Full Moon Picture that is not a full moon picture by Brillig :: Rate this Message: \| View Threaded \| Show Only this Message It's not a picture of a full moon. Ironically, that's one of the reasons it looks good. On Mon, Jan 30, 2012 at 5:03 PM, Sonny Pondrom <sonny@...> wrote: Dear Victor, The picture looks good. Do you have a better one? Sonny Pondrom sonny@... 2012Xb7 "YYYYFFD" On Jan 30, 2012, at 4:43 PM, Victor Engel wrote: Dear Calendar People, There's a picture on wikimedia commons that has been bothering me for a while because it purports to be a picture of a full moon but actually is not such. It is referenced by dozens of pages, so rectifying the problem will take some work. As a first step, I changed the description from full moon to nearly full moon and then added it to a page where it has been nominated to be delisted as a featured picture. If you have an opinion one way or the other about this, please share at: http://commons.wikimedia.org/wiki/Commons:Featured_picture_candidates/removal/File:Full_Moon_Luc_Viatour.jpg Victor
	Re: Full Moon Picture that is not a full moon picture by Amos Shapir-2 :: Rate this Message: \| View Threaded \| Show Only this Message I guess this image would be a good representation of the term "full moon" to 99.9% of people (anyone but a few astronomers and other purists, that is). What do you suppose is the age of the moon in the picture? If it's less than one day after the precise moment of full moon, I think that should suffice. On Tue, Jan 31, 2012 at 1:04 AM, Victor Engel <brillig@...> wrote: > It's not a picture of a full moon. Ironically, that's one of the reasons it > looks good. > > On Mon, Jan 30, 2012 at 5:03 PM, Sonny Pondrom <sonny@...> wrote: >> >> Dear Victor, >> The picture looks good. Do you have a better one? >> >> Sonny Pondrom >> sonny@... >> 2012Xb7 >> "YYYYFFD" >> -- Amos Shapir
	Re: Full Moon Picture that is not a full moon picture by Brillig :: Rate this Message: \| View Threaded \| Show Only this Message Comparing the EXIF data of the picture to astronomical data, it is more than one day from the full moon. On Tue, Jan 31, 2012 at 9:27 AM, Amos Shapir <amos083@...> wrote: I guess this image would be a good representation of the term "full moon" to 99.9% of people (anyone but a few astronomers and other purists, that is). What do you suppose is the age of the moon in the picture? If it's less than one day after the precise moment of full moon, I think that should suffice. On Tue, Jan 31, 2012 at 1:04 AM, Victor Engel <brillig@...> wrote: > It's not a picture of a full moon. Ironically, that's one of the reasons it > looks good. > > On Mon, Jan 30, 2012 at 5:03 PM, Sonny Pondrom <sonny@...> wrote: >> >> Dear Victor, >> The picture looks good. Do you have a better one? >> >> Sonny Pondrom >> sonny@... >> 2012Xb7 >> "YYYYFFD" >> -- Amos Shapir
	Re: Full Moon Picture that is not a full moon picture by Brillig :: Rate this Message: \| View Threaded \| Show Only this Message Let me correct that. It is not more than a day old. It is less than a day old, but it's the night following. Because of the parallax from viewing the moon from Earth, the phase of the moon appears to be roughly the same throughout the night, then "jumps" to the next phase the following night. The full moon in question was 2006-10-07 03:13 UT. The picture was taken at 2006-10-07 22:52, timezone not specified, but taken in Belgium, so likely is +1Hr. The main thing to notice is that the observation time is the night following full moon, not the same night as full moon, so parallax would make it look a day old in any case. The calendar date is the same, but the night is different. Victor On Tue, Jan 31, 2012 at 9:40 AM, Victor Engel <brillig@...> wrote: Comparing the EXIF data of the picture to astronomical data, it is more than one day from the full moon. On Tue, Jan 31, 2012 at 9:27 AM, Amos Shapir <amos083@...> wrote: I guess this image would be a good representation of the term "full moon" to 99.9% of people (anyone but a few astronomers and other purists, that is). What do you suppose is the age of the moon in the picture? If it's less than one day after the precise moment of full moon, I think that should suffice. On Tue, Jan 31, 2012 at 1:04 AM, Victor Engel <brillig@...> wrote: > It's not a picture of a full moon. Ironically, that's one of the reasons it > looks good. > > On Mon, Jan 30, 2012 at 5:03 PM, Sonny Pondrom <sonny@...> wrote: >> >> Dear Victor, >> The picture looks good. Do you have a better one? >> >> Sonny Pondrom >> sonny@... >> 2012Xb7 >> "YYYYFFD" >> -- Amos Shapir
	Re: Full Moon Picture that is not a full moon picture by RDoug :: Rate this Message: \| View Threaded \| Show Only this Message "Brillig" wrote: > It is less than a day old, but it's the night following. Full Moon means Moon at the instant of Opposition. Why should Opposition refer only to Longitude? True Opposition is a three-dimensional consideration. Therefore the only TRUE "Full Moon" occurs at the mid-point of a Total Lunar Eclipse, with the Moon completely dark. I propose the Full Moon picture should be replaced by a picture of a Dark Moon at Total Eclipse... with the accompanying explanation that NO Bright Moon can ever really be "Full". -- RDoug
	Re: Full Moon Picture that is not a full moon picture by Brillig :: Rate this Message: \| View Threaded \| Show Only this Message Why? It's simple. New Moon and Full Moon are the boundaries between waxing and waning. That rhythm of the moon alternating from one to the other continues whether or not there is an eclipse. Victor On Tue, Jan 31, 2012 at 10:45 AM, RDoug <rdouglass001@...> wrote: "Brillig" wrote: > It is less than a day old, but it's the night following. Full Moon means Moon at the instant of Opposition. Why should Opposition refer only to Longitude? True Opposition is a three-dimensional consideration. Therefore the only TRUE "Full Moon" occurs at the mid-point of a Total Lunar Eclipse, with the Moon completely dark. I propose the Full Moon picture should be replaced by a picture of a Dark Moon at Total Eclipse... with the accompanying explanation that NO Bright Moon can ever really be "Full". -- RDoug -- View this message in context: http://old.nabble.com/Full-Moon-Picture-that-is-not-a-full-moon-picture-tp33232862p33237559.html Sent from the Calndr-L mailing list archive at Nabble.com.
	Re: Full Moon Picture that is not a full moon picture by RDoug :: Rate this Message: \| View Threaded \| Show Only this Message "Brillig" wrote: > New Moon and Full Moon are the boundaries between waxing and waning. OK, we could call this "Relative" (rather than Absolute) New Moon and Full Moon. Still, each event is instantaneous (relative to Earth's Center). And, allowing for Parallax as you suggest, could only be observed from a single point at any given Earth Latitude (except near the Poles, where Longitude +/- 180 degrees could also qualify. Considering the uncertainties of Nutation and so forth, nobody could ever claim with absolute confidence that they had photographed the Full Moon. So all pictures making any such claim should be banned. Full Moon is merely an Ideal... never to be Realized! -- RDoug
	Re: Full Moon Picture that is not a full moon picture by Irv Bromberg :: Rate this Message: \| View Threaded \| Show Only this Message On 2012 Jan 31, at 12:19 , RDoug wrote: > Nutation and so forth, nobody could ever claim with absolute confidence that > they had photographed the Full Moon. So all pictures making any such claim > should be banned. Full Moon is merely an Ideal... never to be Realized! Watch the video -- pick any of the 13 full moon images that you like (near perigee is best). Pictures taken from a lunar orbiting satellite. http://www.youtube.com/watch?v=F9pVaTQinIw&feature=youtu.be