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The Analemma Gallery ... Knowing that, like many things in nature, the speed of the sun's declination change can be represented with a sine curve, I set the length of a year (365 days) to equal the x-coordinates for ... Since the sine curve moves between 1 and -1, I chose a delta-y of 0.1 for the change in the sun's declination.
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www.analemma.de/english/analem.html
www.analemma.de/english/analem.html
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Set the analemma curve upright, and it becomes a miniature almanac. The vertical coordinate of each point on it gives the sun's declination on a particular day of the year, while the horizontal coordinate tells how much the sun is ahead of or behind clock time on that day.
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pantherfile.uwm.edu/kahl/www/Images/Weather/Other/anale...
pantherfile.uwm.edu/kahl/www/Images/Weather/Other/analemma.html
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Build an Analemma Curve ... home the president's pen construct an analemma about us officers by-laws become a member make a donation contact u star-gazing clear sky clock calendar gallery links map of park directions site plans telescope educational programs...
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www.analemma.org/constructanalemma.html
www.analemma.org/constructanalemma.html
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By the end of the 18th century, the analemma figure eight curve we all are familiar with (see figure #1) was being added to the meridiana so that mean time could be determined from Sun time. The figure eight curve corrected Sun time to mean time.
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www.analemma.org/presidentspen.html
www.analemma.org/presidentspen.html
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The analemma curve which is familiar to us today was conceived in 1740 by Jean Paul Grandjean de Fouchy, secretary of the Acad mie des Sciences in Paris.23 The curve provided a graphic representation of the equation of time and was intended for use on meridian lines;
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www.longwoodgardens.org/docs/analemma.pdf
www.longwoodgardens.org/docs/analemma.pdf
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Many globes have this figure 8, called an "analemma curve," drawn on them somewhere out in the Pacific Ocean (really it has nothing to do with any ...
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www.questia.com/PM.qst?a=o&se=gglsc&d=5006702110
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This figure-8 path that the sun makes in the sky is called the analemma. On some days you might notice that the sun is not in the sky where, according to the time on your watch, you would expect it to be.
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www.analemma.com/Pages/framesPage.html
www.analemma.com/Pages/framesPage.html
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On the analemma curve, what are the dates when clock time exactly agrees with Sun time? Is there anything familiar about those dates? This article was written by Diane Fisher, writer and designer of The Space Place website at spaceplace.nasa.gov.
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spaceplace.nasa.gov/en/educators/NMP_timekeeping.pdf
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Let's go back to the celestial sphere and watch the path of the true sun making the analemma curve. The speed of the true sun on the ecliptic reflects its elliptical orbit around the Sun, moving faster in January and slower in July.
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www.math.nus.edu.sg/aslaksen/projects/sundials/analemma...
www.math.nus.edu.sg/aslaksen/projects/sundials/analemma_summation.html
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