Related by context. Frequent words. (Click for all words.) 40 Pontes 39 Endeavour astronauts 38 Wakata 36 Fincke 35 NASA astronaut 35 Russian cosmonauts 35 Discovery astronauts 35 Aldrin 34 astronauts 34 Reisman 34 International Space Station 34 crewmates 34 Space Shuttle Discovery 33 Padalka 33 Gagarin 33 spacecraft 33 Chiao 32 Soyuz capsule 32 Eileen Collins 32 cosmonauts 32 Mike Fincke 32 Lopez Alegria 32 Yuri Gagarin 32 Baikonur Cosmodrome 31 Soyuz TMA 31 Melroy 31 Astronauts 31 cosmonaut 31 Mark Polansky 31 Soyuz 31 orbit 31 Endeavour 31 orbiter 31 astronaut 30 Astronaut 30 Tani 30 Alan Shepard 30 Atlantis 30 shuttle missions 30 Sharipov 30 Grunsfeld 29 Solar Impulse 29 Buzz Aldrin 29 Parazynski 29 lunar orbit 29 spacewalker 28 lunar surface 28 zero gravity 28 ISS 28 weightlessness 28 Mission Control 28 manned spacecraft 28 spacewalkers 28 Noguchi 28 microgravity 27 Garriott 27 spaceflight 27 lunar exploration 27 NASA 27 Nasa 27 Shenzhou 26 outer space 26 Massimino 26 Space Station 26 space shuttle 26 spacesuit 26 Hayabusa 26 Neil Armstrong 26 Baikonur 25 Mars 25 JPL 25 Hubble 25 manned spaceflight 24 manned missions 24 Zhai 24 Bolden 24 Gerstenmaier 24 Planetary Society 24 space shuttles 24 NASA Administrator 23 moon 23 Heras 23 Dittemore 23 lunar landing 23 Satcher 23 human spaceflight 23 space 23 Discovery 22 SPACE.com 22 Apollo 22 Space Shuttle 20 Merckx 19 HTV 19 moonwalk 19 Mars Rover 19 Armstrong 18 Squyres 18 Constellation 17 Roco 17 Tondo 14 Bowersox