EntityQ1406559· pop 14· linked from 203 articlesProtonSign in to saveSoviet satellite modelConnectionsEnvironmental Research SatelliteEntitySECOREntityPioneer 6, 7, 8, and 9EntityBaikonur Cosmodrome Site 81EntityGravity Gradient Technology SatelliteEntityRussianEntityastronomyEntitySoviet UnionConceptIndian OceanEntityprotonEntityquarkEntityLomonosov Moscow State UniversityEntitygamma rayEntityhertzEntitySputnik 1EntitySergei KorolevEntityelectronvoltEntityorbital periodEntityOCLC, Inc.EntityapsisEntityCategoriesSatellite seriesSatellites of the Soviet UnionSpacecraft launched in 1965Spacecraft launched in 1966Spacecraft launched in 1968