Related by context. Frequent words. (Click for all words.) 67 Shenzhou VII 62 Shenzhou V 61 Shenzhou VI 56 unmanned lunar 56 astronaut Yang Liwei 55 Nie Haisheng 55 Astronauts aboard 54 lunar orbiter 54 spacewalk 53 taikonauts 53 Yang Liwei 52 International Space Station 51 lunar exploration 51 Oleg Kononenko 51 manned spacecraft 51 Shuttle astronauts 51 orbiting complex 51 lunar probe 50 Endeavour astronauts 50 Lyndin 50 astronauts 50 spacewalks 50 Shenzhou 50 Chang'e 50 Jiuquan Satellite Launch 50 lunar landing 50 Shuttle Discovery 49 orbiting laboratory 49 shuttle Atlantis 49 Baikonur Kazakhstan 49 manned spaceflight 49 orbiting observatory 49 Jiuquan 49 spacemen 49 cosmonauts 48 commander George Zamka 48 Space Shuttle Discovery 48 6 #/#-hour spacewalk 48 Soviet cosmonaut Yuri Gagarin 48 Yuri Gagarin 48 Discovery astronauts 48 spacecraft 48 Ariane rocket 48 orbital module 47 chief Anatoly Perminov 47 Anatoly Perminov 47 Russian cosmonauts 47 Robert Behnken 47 Koichi Wakata 47 Roskosmos 47 orbit 47 Cosmonauts 47 Fyodor Yurchikhin 47 countdown 47 space shuttle Discovery 47 orbiting 47 Automated Transfer Vehicle 46 Mikhail Kornienko 46 Spacewalking astronauts 46 Malenchenko 46 Gorie 46 spacecrafts 46 manned missions 46 orbiting outpost 46 Shuttle Endeavour 46 lunar orbit 46 Soyuz rocket 46 Atlantis astronauts 46 orbiter 45 Caldwell Dyson 45 lunar rover 45 ESA astronaut 45 Spacewalkers 45 Spacewalk 45 Astronauts 45 Lonchakov 45 Nasa 45 Cassini Huygens 45 Space Agency 45 astronaut Peggy Whitson 45 cosmonaut 45 Perminov 45 Gagarin 45 G Madhavan Nair 44 Julie Payette 44 orbital outpost 44 Space Shuttle Atlantis 44 Piers Sellers 44 Greg Chamitoff 44 Heidemarie Stefanyshyn Piper 44 blastoff 44 Eyharts 44 Yurchikhin 44 Space Station 44 astronauts aboard 44 Space Shuttle Endeavour 44 Discovery payload bay 44 Soyuz 44 NASA 44 shuttle Endeavour 44 JAXA