Štefánik's Observatory, Astronomical observatory in Hradčany district, Prague, Czech Republic.
Štefánik's Observatory is an astronomical facility located in Prague's Hradčany district on Petřín hill at about 321 meters above sea level. Inside are two main telescopes, including a Zeiss refractor and a Maksutov-Cassegrain model, both used for viewing the night sky.
The Czech Astronomical Society, founded in 1917, planned a public observatory from the start; after failed sites, Prague donated a house and land by the Hunger Wall on Petřín in 1927. Construction began that October to a design by Václav Veselík, and the east wing with its dome opened on 24 June 1928. The main dome was finished in 1930, and the observatory has been part of the city's observatory and planetarium organization since 1979.
The observatory bears the name of Milan Rastislav Štefánik, a Slovak astronomer and politician, chosen by the Czech Astronomical Society after his death in 1919. The building's name was approved in April 1928 as the Lidová hvězdárna Štefánikova. Visitors can join evening sky viewing, daytime solar observation, lectures, exhibitions, an astronomy club for children and a two-year astronomy course.
The observatory is accessible by walking from central Prague or using public transit that reaches Petřín hill. Check opening times before visiting, as they vary with the season and weather conditions that affect viewing.
The foundation of the main telescope holds ceremonial urns containing the ashes of two important Czech astronomers who shaped the observatory's work. This makes the site a living memorial to their contributions to astronomy.
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