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The history of Soviet space exploration has been well documented on the country's stamps. These include not only the notable accomplishments in space flight, including mankind's first satellite, Sputnik 1, first animal in space (the dog Laika on Sputnik 2), first human in space and Earth orbit (cosmonaut Yuri Gagarin on Vostok 1), first Moon impact (1959) and unmanned landing, first space station, and first interplanetary probe but also more general astronomical observation. ==Further reading== * Gurevich, Iakov Borisovich and Vladimir Il'ich Shcherbakov. ''Kosmicheskaia filateliia: katalog-spravochnik''. Moscow: Radio i sviaz, 1986 126p. * Kvasnikov, IU. S. ''Rossiiskaia kosmonavtika na pochtovykh markakh 1951-1995''. Moscow: Novosti Kosmonavtiki?, 1996 154p. * Kvasnikov, Yuri. ''Russian Cosmonautics On Postage Stamps''. Falkirk: Astro Space Stamp Society, 1999 35p. * Reichman, James G. ''Soviet and Russian philatelic items related to dogs in space''. Mesa, Arizona: James G. Reichman, 2012 97p. * Sashenkov, Evgeniĭ Petrovich. ''Sovetskaia kosmonavtika v filatelii: katalog-spravochnik''. Moscow: Glavnaia Filatelisticheskaia kontora, Soiuzpechati Ministerstva sviazi SSSR, 1967 138p. 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「Soviet space exploration history on Soviet stamps」の詳細全文を読む スポンサード リンク
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