research 586 research of universe 157 science 77 cosmonautics 63 astronomy 62 applied research 53 history 49 more ... cosmic probes 43 development 40 image processing 38 scientific institutions 37 nuclear physics 34 methodology of science 34 engineering 27 sociological research 26 research projects 26 space ships 25 simulation and modelling 23 Mars 22 research techniques 22 empirical research 21 nuclear engineering 21 statistical methods 21 scholarly communication 21 innovation 20 comparative research 19 osobnosti 18 extra-terrestrial observation equipments 17 gamma rays 16 analysis of electroluminescent radiation 15 less ...