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Astrophysics Dec 2012

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Since the Earth's mean solar day is almost exactly 24 hours, an analemma can be traced by plotting the position of the Sun as viewed from a fixed position on Earth at the same clock time every day for an entire year. The resulting curve resembles a lemniscate of Bernoulli. This curve is commonly printed on globes, usually in the eastern Pacific Ocean, the only large tropical region with very little land. It is possible, though challenging, to photograph the analemma, by leaving the camera in a fixed position for an entire year and snapping images on 24-hour intervals (or some multiple thereof), see section below. Reference: http://en.wikipedia.org/wiki/Analemmahttp://en.wikipedia.org/wiki/Analemma

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Astrophysics Dec 20012

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Analema

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Thermal Imaging

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