ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY
Transit of Venus, Eden, Australia. This expedition travelled to Eden, New South Wales, south of Sydney, Australia, to observe the transit of Venus that took place on 9 December 1874. Such transits (where Venus passes across the Sun as seen from the Earth) are rare, occurring in pairs over 100 years apart. The 19th-century transits (1874 and 1882) saw numerous expeditions to make observations, as well as some privately-funded expeditions. The results helped establish the size of the solar system. Seated at right is William Scott (1825-1917), expedition leader and former Government Astronomer at Sydney Observatory.
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