Fig. 1
Aspect of Venus on November 16, 2007 (top) and June 12, 2009 (bottom). The black dot next to the eastern limb represents the sub-solar point. The small circle at the center represents the sub-earth point. Coordinates of the sub-earth and sub-solar points are indicated in the east longitude convention, along with the pole axis tilt angle. From http://www.imcce.fr
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