1894-1989 1912-1977 annede astronautics correspondence correspondencegaucourt correspondencegaucourtfamily duitsers familygaucourt france germany hermann history influenceehricke influenceley influenceoberth influencevonbraun kolyma(concentrationcamp) kolymamountainsregion kraffta politicalprisoners propulsion rocketry rockets ruimtevaart russia(federation) scientists sobolev spaceflighttothemoon unitedstates vasiliĭ wernher willy wives women