Phases Of Venus, 19th-century Diagram
Photograph - Photograph
Phases of Venus. This diagram shows the movements of Venus relative to the Sun from 18 July 1888 to 18 February 1890. The number labels are in sequence from 1 to 14 (numbers 5 and 11 are the half-phases at left and right). Venus was visible as the 'evening star' from positions 4 to 7, and as the 'morning star' from positions 9 to 13. Venus is the second planet from the Sun, orbiting at an average distance of 108 million kilometres, taking 224 days to complete an orbit, but 584 days to complete its phases as seen from Earth. Artwork from the third volume (first period of 1889) of the French popular science weekly 'La Science Illustree'.
May 6th, 2013
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