by APOD Robot » Mon Oct 14, 2013 4:05 am
High Noon Analemma Over Azerbaijan
Explanation: Is the Sun always straight up at noontime? No. For example, the Sun
never appears directly overhead from locations well north or south of the Earth's equator. Conversely, there is
always a place on Earth where the Sun will appear at zenith at noon -- for example on the equator during an
equinox. Turning the problem around, however, as in finding where the Sun actually appears to be at
high noon, is as easy as waiting for midday, pointing your camera up, and taking a picture. If you do this
often enough, you find that as the days march by, the Sun slowly traces out a figure eight on the sky.
Pictured above is one such high noon
analemma -- a series of pictures always taken at exactly noontime over the course of a year. The
above fisheye image, accumulated mostly during 2012, also shows some buildings and trees of
Baku,
Azerbaijan around the edges.
[/b]
[url=http://apod.nasa.gov/apod/ap131014.html][img]http://apod.nasa.gov/apod/calendar/S_131014.jpg[/img] [size=150]High Noon Analemma Over Azerbaijan[/size][/url]
[b] Explanation: [/b] Is the Sun always straight up at noontime? No. For example, the Sun [i] never [/i] appears directly overhead from locations well north or south of the Earth's equator. Conversely, there is [i] always [/i] a place on Earth where the Sun will appear at zenith at noon -- for example on the equator during an [url=http://apod.nasa.gov/apod/ap130922.html]equinox[/url]. Turning the problem around, however, as in finding where the Sun actually appears to be at [url=http://en.wikipedia.org/wiki/Noon]high noon[/url], is as easy as waiting for midday, pointing your camera up, and taking a picture. If you do this [url=http://www.analemma.com/]often enough[/url], you find that as the days march by, the Sun slowly traces out a figure eight on the sky. [url=http://apod.nasa.gov/apod/%20http://www.twanight.org/newTWAN/photos.asp?ID=3004095]Pictured above[/url] is one such high noon [url=http://en.wikipedia.org/wiki/Analemma]analemma[/url] -- a series of pictures always taken at exactly noontime over the course of a year. The [url=http://www.slate.com/blogs/bad_astronomy/2013/04/29/analemma_the_position_of_the_sun_in_the_sky_changing_over_a_year.html]above fisheye image[/url], accumulated mostly during 2012, also shows some buildings and trees of [url=http://en.wikipedia.org/wiki/Baku]Baku[/url], [url=http://en.wikipedia.org/wiki/Azerbaijan]Azerbaijan[/url] around the edges.
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