Related by context. Frequent words. (Click for all words.) 51 EVAs 50 orbiting complex 49 shuttle Atlantis 47 International Space Station 47 Yurchikhin 47 Discovery astronauts 47 Lyndin 46 astronauts 46 Krikalev 46 spacecraft 46 Mission Specialists 46 Space Shuttle Atlantis 46 Mikhail Kornienko 46 Padalka 46 undock 45 Automated Transfer Vehicle 45 Leroy Chiao 45 space shuttle Discovery 45 spokesman Valery Lyndin 45 Space Station 45 space shuttle Atlantis 45 docking 45 durations 45 Soyuz spacecraft 45 Harmony module 44 crewmembers 44 Kaleri 44 undocking 44 Shuttle Atlantis 44 Bob Thirsk 44 Soyuz craft 44 Oleg Kononenko 44 spacewalk 44 sols 44 Fyodor Yurchikhin 44 Soyuz 44 Shuttle Launch 44 Space Shuttle Discovery 44 Discovery liftoff 43 Soyuz TMA 43 Malenchenko 43 shuttle Discovery 43 orbiting laboratory 43 orbiter 43 Oleg Kotov 43 shuttle Endeavour 43 shuttle payload bay 43 shuttle astronauts 43 orbiting telescope 43 biological clocks 43 orbiting observatory 42 Endeavour astronauts 42 Flight Readiness 42 thrusters 42 Hubble servicing 42 ISS 42 Shuttle astronauts 42 docking port 42 Discovery payload bay 42 excessive sleepiness 42 Shuttle Discovery 42 New Horizons spacecraft 42 Atlantis astronauts 42 shuttle 42 gap fillers 41 Launch Pad #A 41 rover Opportunity 41 Soyuz capsule 41 Orion spacecraft 41 Russian Soyuz 41 undocked 41 circadian rhythms 41 Russian Soyuz spacecraft 41 spacecrafts 41 orbiting outpost 41 spacewalkers 41 Soyuz rocket 41 astronauts aboard 41 Space Shuttle Program 41 Shuttle Endeavour 41 orbit 41 Sharipov 41 Michael Lopez Alegria 41 liftoff 40 spacewalks 40 space shuttle Endeavour 40 By NBC# NBC# 40 orbital 40 space shuttle 40 By trevor 40 director Holly Ridings 40 lunar orbit 40 Commander Eileen 40 orbiting lab 39 crewmates 39 Robert Behnken 39 Baikonur Kazakhstan 39 Gregory Chamitoff 39 Space Shuttle Endeavour 39 orbiters 39 shuttle fleet