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Rozhen Observatory ((ブルガリア語:Национална астрономическа обсерватория "Рожен"), ''НАО-Рожен'' - NAO-Rozhen) is a Bulgarian astronomical observatory, located 90 km south of the city of Plovdiv, Bulgaria. The nearest town, Chepelare, is 15 km away. The observatory is owned and operated by the Institute of Astronomy of the Bulgarian Academy of Sciences. It was officially opened on 13 March 1981, almost 20 years after Bogomil Zhivkov Kovachev (a Professor of Astronomy at BAS, known as its founder) had started working towards that goal.〔http://www.vidin-online.com/grazhdani/prof-d-r-bogomil-kovachev : accessed 14 September 2015 (in Bulgarian)〕〔http://wop.fpni.eu/digital_pdf/wop/3_2012.pdf image 53 of 66 : accessed 14 Sept 2015 (in Bulgarian)〕 The Observatory is the largest in Southeastern Europe〔http://nao-rozhen.org/history/fr_en.htm : accessed 14 Sept. 2015〕 and has an active team of about 50 astronomers. It is the principal center for astronomical research in Bulgaria. ;Telescopes *200 cm Ritchey-Chretien telescope (supplied with Coude focus)〔http://www.nao-rozhen.org/telescopes/fr_en.htm〕 *60 cm Cassegrain telescope *50/70 cm Schmidt camera *15 cm Solar telescope ==WASP-3c & TTV== Transit Timing Variation (TTV), a variation on the transit method, was used to discover an exoplanet WASP-3c by Rozhen Observatory, Jena Observatory, and Toruń Centre for Astronomy.〔http://www.scientificcomputing.com/news-DS-Planet-Hunting-Finding-Earth-like-Planets-071910.aspx "Planet Hunting: Finding Earth-like Planets"〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rozhen Observatory」の詳細全文を読む スポンサード リンク
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