Related by context. Frequent words. (Click for all words.) 59 Soyuz rockets 57 shuttle 57 reusable spacecraft 53 Orion spacecraft 52 Russian Soyuz capsules 52 Soyuz capsules 52 shuttles 52 unpiloted 52 interplanetary missions 51 cryogenic engines 51 Based Infrared 51 Soyuz craft 51 shuttle fleet 51 spacecrafts 50 space shuttle 50 manned spaceship 50 Ariane rocket 50 Crew Exploration 50 Minotaur IV 50 robotic explorers 49 Soyuz rocket 49 Hubble servicing 49 aboard Soyuz spacecraft 49 Wideband Global 49 Russian Soyuz 49 Orion capsule 48 Soyuz spacecraft 48 pad #A 48 Resourcesat 2 48 spacecraft 48 KSLV 1 48 Russian Soyuz spacecraft 48 space shuttles 48 SpaceX Falcon 9 48 Dragon spacecraft 48 Soyuz 48 Exploration Vehicle 48 interplanetary spacecraft 48 manned spacecraft 48 Orion Crew 47 astronauts 47 Dragon capsule 47 Russian Soyuz rocket 47 PSLV C# 47 resupply missions 47 orbiters 47 International Space Station 47 polar orbiting 47 Shuttle 47 payloads 47 Iridium NEXT 46 geosynchronous 46 JCSAT 46 Soyuz capsule 46 gaseous hydrogen 46 Endeavour STS 46 orbital laboratory 46 Launch Vehicle 46 suborbital spaceflight 46 ion propulsion 46 spaceports 46 shuttle orbiter 46 Automated Transfer Vehicle 46 Huntsville Ala. manages 46 dockings 45 Ares rocket 45 pressurized compartment 45 manned missions 45 lunar outpost 45 Space Shuttle 45 Proton Breeze M 45 scramjets 45 unmanned 45 Ares I. 45 Tanegashima Space Center 45 geosynchronous transfer 45 space shuttle Discovery 45 Defense THAAD 44 Launch Pad #B 44 human spaceflight 44 scramjet engine 44 shuttle missions 44 GSLV D3 44 Oceansat 2 44 spaceplane 44 aboard Endeavour 44 space shuttle Atlantis 44 TacSat 44 deorbit 44 orbit spares 44 orbiting complex 44 Japanese astronaut Koichi 44 lunar missions 44 propulsion 44 geostationary orbit 44 liquid propellant 44 NASA Authorization 43 Space Fence 43 Advanced Extremely 43 GOES N 43 Pad #A