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A125560
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Full solid angle of 4*Pi steradians (sr) in square degrees (degree^2).
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3
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4, 1, 2, 5, 2, 9, 6, 1, 2, 4, 9, 4, 1, 9, 2, 7, 1, 0, 3, 1, 2, 9, 4, 6, 7, 1, 4, 6, 6, 1, 5, 5, 7, 2, 2, 6, 3, 9, 3, 3, 1, 9, 4, 0, 1, 7, 5, 9, 2, 6, 3, 1, 1, 5, 1, 5, 3, 9, 5, 3, 7, 5, 5, 8, 0, 0, 6, 6, 0, 4, 9, 9, 4, 6, 7, 9, 1, 5, 1, 7, 8, 9, 5, 3, 5, 7, 4, 9, 7, 6, 7, 7, 0, 1, 2, 7, 9, 9, 8, 7, 9, 8, 1, 4, 0
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OFFSET
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5,1
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COMMENTS
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"A 35 mm camera with a standard 50 mm lens covers an area some 38 degrees x 27 degrees. Theoretically, one can cover the sky with about 40 photographs." [A Field Guide]
One sphere = 4*Pi steradians, a spherical right angle = 1/4 hemisphere = 1/8 sphere = Pi/2 steradian.
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REFERENCES
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John A. Adam, Mathematics in Nature, Modeling Pattern in the Natural World, Princeton University Press, Princeton & Oxford, 2003, page 78.
Patrick Kelly, Editor, Observer's Handbook 2007, The Royal Astronomical Society of Canada, page 32.
Donald H. Menzel, A Field Guide to the Stars and Planets, Houghton Mifflin Co., Boston, MA, 1964, page 317.
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LINKS
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FORMULA
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EXAMPLE
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41252.96124941927103129467146615572263933194017592631151539537558... deg^2.
= 148510660.979093757126608172781606015015949846333347214554233520... min^2.
= 534638377792.473752565578942201378165405741944680004997239524067... sec^2.
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MATHEMATICA
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RealDigits[2^6*3^4*5^2/Pi, 10, 111][[1]]
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PROG
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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