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Petrozavodsk phenomenon
The Petrozavodsk phenomenon was a series of celestial events of disputed nature on September 20, 1977. The sightings were reported over a vast territory from Copenhagen and Helsinki on the west to Vladivostok on the east. The phenomenon is named after the city of Petrozavodsk in Russia (then in the Soviet Union), where a glowing object that showered the city with numerous rays was widely reported.
Official government letters from northern European countries to Anatoly Aleksandrov, President of the Academy of Sciences of the USSR, expressed concern about whether the observed phenomenon was caused by Soviet weapons testing and whether it constitutes a threat to the region’s environment. Since 1977, the phenomenon has been often, though not universally, attributed to the launch of the Soviet satellite ''Kosmos-955''. In the same year, a preliminary report for the Academy of Sciences of the USSR, which contained a vast body of visual observations, radiolocation reports, physical measurements and accompanying meteorological data, concluded that "based on the available data, it is unfeasible to satisfactorily understand the observed phenomenon". The Petrozavodsk phenomenon contributed to the creation of Setka AN, a Soviet research program for anomalous atmospheric phenomena.
==Name==
In the early Soviet reports the Petrozavodsk phenomenon was referred to as the phenomenon of 20 September 1977. Later it became known as the Petrozavodsk phenomenon. Sometimes it is also called the Petrozavodsk incident〔 or the Petrozavodsk miracle.〔 The phrase "unidentified flying object" in the Soviet Union was substituted by the term "anomalous phenomenon" for research purposes.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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