Industrial Exposition Archenhold Observatory

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the great refractor @ great industrial exposition of berlin 1896


the archenold observatory began temporary installation @ 1896 great industrial exposition of berlin. @ initiative of wilhelm foerster , max wilhelm meyer, intended present scientific , astronomical knowledge general public. plans large telescope friedrich simon archenhold had been working on invoked purpose. although plans research instrument, design being criticised @ time. admittance charges @ exposition intended finance construction , later relocation of instrument. telescope erected in treptower park , sheltered in wooden building provided exhibition space , lecture theatre. when industrial exposition opened on 1 may 1896, great refractor still unfinished; began operation in september 1896. telescope has aperture of 68 cm (27 in) , focal length of 21 m (69 ft); movable mass 130 metric tons.


due late completion there no finance move telescope after exposition. @ end of 1896 city of berlin gave permission observatory remain in treptower park. archenhold, without astronomer s salary, decided turn installation public observatory. operated society, verein treptow-sternwarte e. v. archenhold president. considered oldest , largest public observatory in germany.


the exhibition covered themes history of astronomy, earth , moon, sun , planets, comets , meteors, stars , star clusters, instruments , optics. observations included standard objects, lunar eclipses, comets , nova cygni 1903. 23,000 visitors attended in 1897, number rising 60,000 1899 , remaining constant until 1930s.







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