U.S.S.R.
Denominazione ufficiale: Unione delle Repubbliche Socialiste Sovietiche
Official name: Union of Soviet Socialist Republics
Nome nella lingua originale: Sojuz Sovetskich Socialisticeskich Respublik
Superficie: 22.402.200 km² (1945)
Popolazione: 293.047.571 ab. nel 1991
Tipo di governo: Repubblica a partito unico
Capitale: Mosca
Moneta: Rublo sovietico
Lingue ufficiali: Russo
Nascita: 30 dicembre 1922
Fine: 26 dicembre 1991
Area: Asia
Fuso orario: UTC +02:00 fino a +12:00
Prima emissione: 1923
Ultima emissione: 1992
Per saperne di pił: http://it.wikipedia.org/wiki/Unione_delle_Repubbliche_Socialiste_Sovietiche
Soggetto: a fireball or possibly a comet Anno: 1957 Notizie: In 1957 the Soviet Union issued a stamp commemorating meteorite studies during the International Geophysical Year. The stamp depicts a fireball (or, possibly, a comet) over an observatory. The International Geophysical Year (IGY) was an eighteen month period from July 1957 through December 1958 coinciding with a period of maximum sunspot activity. Scientists from sixty-seven different countries cooperated to study the solar-terrestrial environment. The Scott number for this stamp is 1958. |
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Soggetto: the Sikhote-Alin meteorite shower Anno: 1957 Notizie: On November 20, 1957 the Soviet Union issued a stamp to commemorate the tenth anniversary of the Sikhote-Alin meteorite shower. The Scott catalog number for this stamp is 1995. This stamp reproduces a painting of the Sikhote-Alin event by P. J. Medvedev showing the lengthy trail. The original painting can also be seen on this cover. You can also see a closeup of the cover text. Medvedev witnessed the Sikhote-Alin shower first-hand. The Sikhote-Alin impactor exploded in the atmosphere at a height of about 5.5 kilometers. Fragments landed in an ellipical area between one and two kilometers in size. Over 8,000 iron meteorites with a total weight of over 28 tons have so far been collected from the impact zone. |
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Soggetto: the Tunguska object Anno: 1958 Notizie: On August 12, 1958 the Soviet Union issued a stamp to commemorate both the 50th anniversary of the Tunguska impact event in June, 1908 and the seventy-fifth anniversary of Leonard A. Kulik's birth. Kulik led several scientific expeditions to Tunguska, including the first one in 1927. The Scott catalog number for this stamp is 2088. The exact composition of the Tunguska object is still debated. Some believe it was a stony body, while other believe it was a cometary fragment. In either case, the object exploded in the atmosphere with a force equivalent to between ten and twenty megatons of TNT. The resulting blast wave leveled hundreds of square kilometers of forest. |
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