25 years of manned spaceflight - Germany / German Democratic Republic 1986 - 70 Pfennig

25 years of manned space flight, issue 1986 On the occasion of the "International Aerospace Day", the Ministry of Post and Telecommunications of the German Democratic Republic issued four multicolored special postage stamps in sepia No special First Day Cover Special cancellation from 25th March to 24th May 25th Years of manned space flight On April 12, 1961, the first man on earth, the citizen of the Soviet Union, the Communist Yuri Gagarin, flew into the cosmos, opening the era of manned space travel, and since then, this day has been called the International Day of Air and Space 70-pfennig value: DDR Fourier spectrometer on Venera 15 and 16 The first intercosmos underground space experiment of the GDR was successfully realized by the use of one infrared Fourier spectrometer on each of the Soviet Venus probes Venera 15 and Venera 16. The probes were dated June 2, 1983 (Venera 15) and June 7, 1983 (Venera 16) started and swung into the Polus near Venus orbit on October 10 and October 14, 1983 respectively. The devices developed and built at institutes of the GDR Academy of Sciences had the main task of providing new insights into the temperature and cloud structure as well as the composition of the Venus atmosphere from measurements in the spectral range of 6 ... 38 microns and 6 ... 25 microns respectively to win. The enlarged device image shows the detailed structure of the spectrometer complex, which was installed on the main body of the probe in the vacuum of free space.