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on.br - all language versions

The National Observatory (Portuguese: Observatório Nacional or ON) is an institution localized in Rio de Janeiro, Brazil. Founded by Pedro I on October 15, 1827, it is one of the oldest scientific institutions in the country. Its initial purpose was to guide the geographic studies of Brazil and teaching navigation. The institute is responsible for the Brazilian Official Time and performs various researches and studies in astronomy, astrophysics and geophysics. It offers postgraduate courses leading to master's and doctorate degree. More information...

According to PR-model, on.br is ranked 46,539^th in multilingual Wikipedia, in particular this website is ranked 2,491^st in Portuguese Wikipedia.

The website is placed before sisi-in-england.com and after ctia.org in the BestRef global ranking of the most important sources of Wikipedia.

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