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Arras (FRANCE)

2005-arras00

May 9 , 2005

Lafrançaise
solar noon =13:52
gnomon =1 m ; shadow =50 cm ; angle =26.565°

Arras
solar noon =13:46
gnomon =1 m ; shadow =63.5 cm ; angle = 32.416°

2005-arras01

distance between the parallels = Arras-Lafrançaise = 683 km

difference between the angles = 32.416°- 26.565° = 5.856°

circumference of the Earth = 683 x 360 / 5.856 = 41989 km

από Eric Vayssié — Τελευταία τροποποίηση 20/12/2007 16:25