Related by context. Frequent words. (Click for all words.) 55 Frank Borman 54 Wally Schirra 54 Joseph Acaba 52 lunar module pilot 51 orbited Earth 50 Mission Specialists 50 Gus Grissom 49 Roger Chaffee 49 Gene Cernan 48 Timothy Kopra 48 JPL manages 48 shuttle Challenger 47 Japanese astronaut Koichi 47 NASA Astronaut 47 Space Shuttle Launch 46 astronaut 46 NASA astronaut 46 Russian cosmonaut Gennady Padalka 46 Space Shuttle Endeavor 46 space shuttle 46 Astronaut 46 Compton Gamma Ray 45 Crew Launch Vehicle 45 Blasts Off 45 Ron Garan 45 Christa McAuliffe backup 45 Commander Gennady Padalka 45 Launch Vehicle 44 ISS Expedition 44 Cady Coleman 44 Dan Tani 44 teacher Christa McAuliffe 44 Discovery undocked 44 space shuttles Endeavour 44 Yuri Malenchenko 44 Karen Nyberg 44 Schirra 44 Space Shuttle 44 interplanetary spacecraft 44 Virts 44 Keir Dullea 44 Pavel Vinogradov 43 Christa McAuliffe 43 Ken Bowersox 43 deorbit 43 Huntsville Ala. manages 43 Challenger exploded 43 NASA Spacecraft 43 Shuttle astronauts 43 NASA 43 pressurized compartment 43 Russian cosmonaut Yuri Malenchenko 43 shuttle 43 By Irene Klotz 43 TJ Creamer 43 Piers Sellers 43 Tim Kopra 43 commander Pavel Vinogradov 43 Hobaugh 42 Shuttle Launch 42 Leland Melvin 42 JROTC instructor 42 Owen Garriott 42 Zamka 42 Lunar Module 42 astronaut Ilan Ramon 42 Gennady Padalka 42 Webb Telescope 42 Rick Husband 42 Soviet cosmonaut Yuri Gagarin 42 NASAs 42 Baikonur Kazakhstan 42 aboard Atlantis 42 Exploration Vehicle 42 Edwin Buzz Aldrin 41 spacecraft 41 Astronaut Buzz Aldrin 41 Suni Williams 41 Oleg Skripochka 41 astronauts 41 Alan Shepard 41 Hubble servicing 41 Tom Marshburn 41 Apollo missions 41 cosmonaut training 41 Propulsion System 41 Johns Hopkins Applied Physics 41 Randolph Bresnik 41 Shuttle Discovery 41 shuttle payload bay 41 Russian Gennady Padalka 41 Orbiting 41 fellow spacewalker 41 Greg Chamitoff 41 Aycock Funeral Home 41 Valery Tokarev 41 administrator Sean O'Keefe 41 Astronauts 41 Gregory Chamitoff 41 Neil Armstrong 41 Kenneth Bowersox