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Earth-Venus conjunction, 19th-century artwork. Venus (centre) is the second planet from the Sun (right). This is an inferior conjunction, which occurs when Venus lies between the Earth (left) and the Sun. In this position, Venus is dark (similar to when the Moon is 'new') and difficult to observe unless a rare transit of Venus occurs (when it passes across the Sun). Venus is at its brightest 37 days before and after its inferior conjunction. Artwork from the 19th volume (first period of 1897) of the French popular science weekly 'La Science Illustree'.
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