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Introduction F J Krieger
The Way to the Stars V Borisov
Interplanetary Communications Large Soviet Encyclopedia
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Academician Academy of Sciences acceleration airplane altitude animals apparatus artificial earth satellite artificial satellite astronautics astronomical atomic automatic body calculations circumflight combustion cosmic flights cosmic rays cosmic rocket cosmic ship cosmic space direction Doppler effect earth's atmosphere earth's surface energy field frequency fuel Geophysical instruments International International Geophysical interplanetary communications interplanetary flights interplanetary ship investigations ionosphere jet engines K. E. Tsiolkovskii kilograms kilometers per second launching Mars mass means meters per second missile moon Moscow motion multistage rocket necessary observations obtained operation orbit overload oxygen planets possible precisely pressure problem of interplanetary radiation radio amateurs radio waves realization result rocket engine rocket flight rotation Russian satel satellite's scientific signals solved Soviet Union space flight speed stage station takeoff terrestrial theory of relativity tion trajectory upper atmosphere upper layers USSR USSR Academy utilizing V-2 rocket weight weightlessness world space