http://demonstrations.wolfram.com/Analemmas/
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
The analemma gives the position of the sun in the sky at a fixed time (say, noon) through the course of the year. For the Earth, the analemma is a figure-eight shape. Change the parameters to see what the analemma would be like from planets with differe...
Contributed by: Stephen Wolfram
Based on a program by: Michael Trott
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