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(Click for frequent words.) 68 Apollo missions 64 moonwalkers 62 astronauts 60 Mercury Gemini 56 Mars Pathfinder 56 Cernan 56 Edwin Aldrin 56 astronaut Gene Cernan 55 Gus Grissom 54 lunar surface 54 Viking landers 54 Mars landers 54 Gene Cernan 53 Apollo Skylab 53 Nasa spacecraft 53 Jack Swigert 53 Jing Haipeng 52 Soviet cosmonauts 52 director Gene Kranz 51 Voyager spacecraft 51 lunar module pilot 51 unmanned probes 51 Mars Pathfinder lander 51 astronauts Buzz Aldrin 51 Wally Schirra 51 spaceflyers 51 lunar module 51 NASA 51 Lunar Module Pilot 51 Mars rovers Spirit 51 lunar rovers 51 rovers Spirit 50 astronaut Eugene Cernan 50 spacecraft 50 spacecrafts 50 manned lunar landing 50 NASA Voyager spacecraft 50 astronaut Walter Schirra 50 Curiosity rover 50 landers 50 NASA rovers 50 robotic explorer 49 Apollo lunar 49 Mars rovers 49 space shuttle 49 icy comets 49 lunar rover 49 orbited Earth 49 Skylab 49 Russian Nikolai Budarin 49 Judy Resnik 49 Viking orbiters 49 Walter Schirra 49 rovers 49 engineer Nicole Stott 49 lunar landing 49 Wilkinson Microwave Anisotropy Probe 49 Buzz Aldrin 49 Konrad Dannenberg 49 robotic probes 49 moon Schirra 48 astronaut Wally Schirra 48 Nasa 48 Itokawa asteroid 48 NASA Cosmic Background 48 Donald Deke Slayton 48 Rusty Schweickart 48 astronaut Fred Haise 48 orbiting spacecraft 48 orbiter 48 Stardust spacecraft 48 comet particles 48 Fred Haise 48 Gene Kranz 48 Aldrin 48 Hayabusa spacecraft 48 NASA twin rovers 48 Lunar Excursion Module 48 Apollo 48 lunar landers 48 Mars Reconnaissance Orbiter MRO 48 astronaut 48 Sojourner rover 48 astronauts Jing Haipeng 47 aboard Skylab 47 NASA Stardust spacecraft 47 Story Musgrave 47 magnificent desolation 47 robotic rovers 47 Mars Opportunity rover 47 Gus Grissom Edward 47 Norm Thagard 47 Russian cosmonaut Yuri Gagarin 47 Martian surface 47 crewed spacecraft 47 NASA Lunar Prospector 47 Ellison Onizuka 47 Cosmic Background Explorer 47 Stardust capsule 47 Lunar Module Eagle 47 Lunar Orbiter 47 shuttle Challenger 47 rover Opportunity 47 laboratory Skylab 47 Deke Slayton 47 Discovery astronauts 47 asteroid Itokawa 47 Martian rovers 46 orbiters 46 Shuttle Challenger 46 Hollywood dreck Battlefield 46 Lunar Prospector 46 Mars Lander 46 thrusters maneuvered 46 Lunar Reconnaissance Orbiter LRO 46 X ray telescopes 46 Pamela Melroy 46 Sputnik satellite 46 Lunar Module 46 commander Leroy Chiao 46 Mercury Redstone 46 shuttle underbelly 46 Virgil Gus Grissom 46 W. Haise 46 NASA astronaut corps 46 astronauts Gus Grissom 46 orbiting Hubble Space Telescope 46 shuttle astronauts 46 shuttle Endeavor 46 Werner von Braun 46 astronaut Owen Garriott 46 astronaut Rusty Schweickart 46 Wernher von Braun 46 Solar Dynamics Observatory 46 lunar module Eagle 46 Martian terrain 46 Galileo spacecraft 46 outer space 46 planetary geologists 46 robotic explorers 46 Space Shuttle 46 Mini TES 46 cosmonauts 46 phyllosilicates 46 Orion spacecraft 46 astronauts Zhai Zhigang 46 Comet Halley 45 spacemen 45 microscopic imager 45 Alan Shepard 45 space shuttles 45 rover Spirit 45 Messenger spacecraft 45 Budarin 45 moonwalker 45 Neil Armstrong 45 lunar regolith 45 Theodore von Karman 45 Yury Gagarin 45 Martian rover 45 Owen Garriott 45 astronaut Soichi Noguchi 45 Lunar Roving Vehicle 45 Martian meteorite 45 Astronauts aboard 45 spokesman Michael Braukus 45 Liu Boming 45 Martian craters 45 commander Dick Scobee 45 aboard Atlantis 45 crewmates 45 Itokawa 45 Lunar Rover 45 manned spacecraft 45 Viking Lander 45 lunar missions 45 Lunokhod 45 Hubble Space Telescope 45 Pilot George Zamka 45 Lovell Fred Haise 45 exhaust plume 45 asteroid Eros 45 flyby spacecraft 45 Martian meteorites 45 lunar landings 44 Kenneth Bowersox 44 spacefarers 44 twin Voyager spacecraft 44 spacecraft orbiting 44 Frank Borman 44 father Owen Garriott 44 engineer Garrett Reisman 44 lunar soil 44 micrometeoroids 44 Ken Bowersox 44 Stardust NExT mission 44 Haise 44 Commander George Zamka 44 collectSPACE 44 Lunar Reconnaissance Orbiter Camera 44 lunar dust 44 astronauts aboard 44 Shenzhou spacecraft 44 Russian cosmonaut Yuri Usachev 44 Apollo Soyuz 44 Planck spacecraft 44 astronaut Jerry Linenger 44 Russian cosmonaut Alexander Kaleri 44 meteoroid impacts 44 NFIRE satellite 44 Hubble Telescope 44 Stardust NExT 44 Observatory SDO 44 Hayabusa probe 44 orbiting telescope 44 reentry capsule 44 Armstrong Aldrin 44 orbital rendezvous 44 Foton M3 44 outer planets 44 traveled rocketship 44 lander 44 NASA Administrator 44 THEMIS satellites 44 NASA MESSENGER spacecraft 44 Astronauts 44 Voyager probes 44 moon landings 44 Spirit rover 44 APXS 44 Nikolai Budarin 44 Soviet cosmonaut Yuri Gagarin 44 cosmonaut Valery Tokarev 44 Orbiter MRO 44 NASA Mars rovers 44 Mars Odyssey spacecraft 44 NASA LCROSS 44 lunar orbiters 44 extravehicular activities 44 Ernst Stuhlinger 44 Lieutenant Colonel Yang Liwei 44 Lander robotic arm 44 ocean splashdowns 44 Lt. Col. Yang Liwei 44 NASA Kepler 43 Astronaut Buzz Aldrin 43 Orbiter LRO 43 Ron Garan 43 Oleg Skripochka 43 NASA Wilkinson Microwave 43 rover Sojourner 43 asteroid 43 NASAs 43 spaceward 43 shuttle orbiter 43 Endeavour astronauts 43 comet flyby 43 Engelauf 43 interstellar particles 43 Director Charles Elachi 43 parachutes malfunctioned 43 infrared spectrometers 43 spacecraft orbited 43 rocket scientist Wernher 43 NASA Kepler telescope 43 moon 43 Mars Rover 43 Russian cosmonaut Valery Tokarev 43 NASA Opportunity rover 43 cosmonauts Sergei Volkov 43 Martian plains 43 lunar meteorite 43 MESSENGER spacecraft 43 Enceladus flybys 43 Russian Valery Tokarev 43 meteoroids 43 Cassini Huygens spacecraft 43 Orbiters 43 Shenzhou IV 43 astronaut Yuri Gagarin 43 unmanned spacecraft 43 Lunar CRater Observation 43 Virgil I. 43 rover 43 Edwin Hubble 43 reusable spacecraft 43 Nasa Mars Reconnaissance 43 astronaut Buzz Aldrin 43 Apollo Lunar Module 43 robotic rover 43 teacher Christa McAuliffe 43 Opportunity Mars rover 43 Mars moon Phobos 43 Spirit Mars rover 43 orbiting Mars 43 twin rovers 43 Shuttle Endeavor 43 Mars orbiters 43 Alexander Samokutyayev 43 astronaut Gus Grissom 43 astronaut Charles Camarda 43 Saturn outermost moon 43 Huygens mission 43 Tranquillity Base 43 Russian cosmonaut Alexei Leonov 43 Rover MER 43 NASA ICESat 43 Zhai Zhigang Liu Boming 43 Stuhlinger 43 Saturnian moon Titan 43 robotic landers 43 Cosmonaut Yuri Gagarin 43 moonbase 43 Deep Impact comet 43 Jerrie Cobb 43 weather satellite TIROS 43 NASA Cassini 43 lunar exploration 43 spacewoman 42 comet dust 42 Nasa astronaut 42 comets meteors 42 Mars Odyssey orbiter 42 rover Curiosity 42 Russian Salizhan Sharipov 42 Jack Lousma 42 Doohan ashes 42 Astronaut Peggy Whitson 42 taikonauts 42 DISR 42 WISE spacecraft 42 Kepler spacecraft 42 Klinkrad 42 Yuri Shargin 42 lunar orbiter 42 Susan Kilrain 42 Space Shuttle Discovery 42 twin rovers Spirit 42 director Charles Elachi 42 Cassini Huygens Mission 42 Donn Eisele 42 Infrared Astronomical Satellite 42 Challenger Space Shuttle 42 SpaceLoft XL rocket 42 Mission SRTM 42 Cassini Huygens 42 manned lunar 42 physicist Richard Feynman 42 George Zamka 42 interstellar dust grains 42 SpaceShipOne rocket 42 Clementine spacecraft 42 resident Gregory Chamitoff 42 martian surface 42 cosmonaut Sergei Krikalev 42 Jet Propulsion Laboratory JPL 42 CALIPSO 42 Shoemaker Levy 42 ESA Huygens probe 42 astronaut Leroy Chiao 42 Sacred Vessel 42 Chiaki Mukai 42 Endeavour docked 42 Martian landscape 42 NASA EPOXI mission 42 Carl Sagan 42 Foton spacecraft 42 BepiColombo 42 Vostok spacecraft 42 Mars rover Opportunity 42 Evolution Explorer 42 astronaut Ronald Garan 42 probe Huygens 42 orbiting observatory 42 comets asteroids 42 extravehicular mobility units 42 planetary science 42 asteroids 42 satellites orbiting Earth 42 Space Shuttle Endeavor 42 Mars Orbiter 42 station Skylab 42 Martian soil 42 WISE infrared 42 Martian lander 42 Korotev 42 Kalpana Chawla 42 Yuri Gagarin 42 Houston Tranquility Base 42 Soviet cosmonaut 42 lunar probes 42 Compton Gamma Ray 42 Mars 42 Canadarms 42 taikonaut 42 Gus Grissom Ed 42 Shuttle astronauts 42 scramjets 42 GeneSat 1 42 BBSNews #-#-# NASA 42 Richard Feynman 42 planetary astronomer 42 manned missions 42 1 #/#-pound chunk 42 Eugene Cernan 42 Voyager Galileo 42 SpaceShip One 42 Red Planet 42 cosmonaut Fyodor Yurchikhin 42 Saturn Cassini 42 Col. Yang Liwei 42 aboard Soyuz spacecraft 42 Shenzhou V 42 spacecraft Cassini 42 Satish Dhawan 42 Deep Impact probe 42 spacefaring nations 42 commander moonwalker 42 Gagarin flight 42 O OREOS 42 flyby Cassini 42 New Horizons spacecraft 42 Guenter Wendt 42 Nie Haisheng 42 International Space Station 42 OGLE TR #b 42 Space ENvironment GEochemistry 41 spaceship 41 aboard Soyuz TMA 41 meteorites 41 lobate scarps 41 Meridiani plains 41 Readdy 41 wheeled rovers 41 orbiting observatories 41 satellites orbiting 41 Pilot Terry Virts 41 historian Roger Launius 41 NASA Lunar Reconnaissance 41 June Scobee Rodgers 41 Huygens descent 41 comet nucleus 41 spaceborne 41 buckypaper virtually 41 Astronaut Leroy Chiao 41 Vladimir Komarov 41 Edwin Buzz Aldrin 41 rocket boosters 41 OSIRIS REx 41 Moderate Resolution Imaging 41 aboard Endeavour 41 spaceflights 41 Martian rocks 41 Deep Impact spacecraft 41 Kent Rominger 41 Koichi Wakata 41 Massimino tweeted 41 Russian cosmonaut Maxim Suraev 41 Mars rover 41 Phoenix Mars lander 41 alien civilizations 41 simulated lunar 41 robotic spacecraft 41 Nasa Jet Propulsion 41 dexterous robot 41 NASA Mars rover 41 unmanned lunar orbiter 41 X ray spectrometer 41 NASA Jet Propulsion Laboratory 41 Kavandi 41 Shenzhou spaceships 41 infrared telescopes 41 Commander Eileen 41 ROCSAT 2 41 Mars Orbiter Camera 41 orbiting Hubble telescope 41 tourist Richard Garriott 41 cosmonaut Yuri Gagarin 41 Lousma 41 Solar TErrestrial RElations Observatory 41 NASA Jet Propulsion Lab 41 James Doohan 41 shuttle Endeavour STS 41 Lebar 41 Huygens 41 planets orbiting sun 41 interplanetary missions 41 Shenzhou VI craft 41 shuttle disintegrated 41 antisatellite weapon 41 Japanese astronaut Soichi 41 NuSTAR 41 Hubble telescope 41 orbiting astronauts 41 Sergei Korolev 41 lunar 41 A. Cernan 41 lander robotic arm 41 Italian Roberto Vittori 41 Bowersox Pettit 41 Russian Yuri Lonchakov 41 von Tiesenhausen 41 Revelers ringing 41 telescopic observations 41 Randy Bresnik 41 shuttle crewmates 41 astronaut Pam Melroy 41 Resourcesat 2 41 COBE satellite 41 Samuel Ting 41 aboard Vostok 41 Murchison meteorite 41 inhabitable planets 41 Right Stuff 41 Hale Bopp 41 LCROSS mission 41 CloudSat 41 Challenger exploded 41 neutron spectrometer 41 STS #L 41 Gemini Apollo 41 manned lunar missions 41 ejecta plume 41 planetary Transits 41 comet Wild 41 Fincke radioed 41 robot rovers 41 Mars CRISM 41 Allan Cheuvront 41 #/#-hour spacewalk [001] 41 Shenzhou capsules 41 moondust 41 NASA rovers Spirit 41 astronaut Gregory Chamitoff 41 martian soil 41 pilot Terry Virts 41 STEREO spacecraft 41 engineer Salizhan Sharipov 41 shepherding spacecraft 41 shuttle missions 41 Mir Space Station 41 Planetary Society 41 OSTM Jason 2 41 Foing 41 Israeli astronaut Ilan 41 Jet Propulsion Laboratory 41 Carl Marchetto 41 Hubble 41 astronomer Johannes Kepler 41 Gusev crater 41 Discovery undocks 41 Comet Tempel 1 41 Opportunity rover 41 Gagarin 41 Butterfly Nebula 41 Commander Oleg Kotov 41 Hubble servicing 41 lander rover 41 manned Shenzhou 41 telescopes astronomers 41 astronaut Yang Liwei 41 administrator Sean O'Keefe 41 Astronaut Scholarship 41 astrophysical phenomena 41 Soviet cosmonaut Yury Gagarin 41 Grunsfeld 41 astronaut Ilan Ramon 40 Yury Malenchenko 40 LRO spacecraft 40 lunar meteorites 40 Herschel Space Telescope 40 GEochemistry 40 Mikhail Tyurin 40 Squyres 40 ESA Planck 40 Eagle lunar lander 40 Cosmonaut Hotel 40 robotic rover Spirit 40 STSS Demo 40 Ulysses spacecraft 40 Churyumov Gerasimenko 40 aquanauts 40 Reflection Radiometer 40 astronaut Jack Lousma 40 comet chaser 40 astronaut Julie Payette 40 Astronaut Gregory Chamitoff 40 Hubble Space telescope 40 astronaut Daniel Tani 40 Hubble Space Telescope HST 40 astronaut Rick Sturckow 40 journal Acta Astronautica 40 Sputnik 40 LROC 40 Terry Virts 40 Taurus Littrow Valley 40 defective gyroscope 40 Descent Imager Spectral Radiometer 40 Commander Dominic Gorie 40 NASA Mars Orbiter 40 fiery gases 40 spaceflight 40 Pam Melroy 40 flame trench 40 Russians Alexander Kaleri 40 RSRMs 40 AERONET 40 Kuiper belt objects 40 Hayabusa capsule 40 aboard Taurus XL 40 Soyuz TMA #M 40 Shenzhou VII spacecraft 40 Huygens probe 40 ESA GOCE 40 Commander Charlie Hobaugh 40 meteorite bombardment 40 code talkers 40 orbiting Cassini spacecraft 40 Christa McAuliffe 40 Foton M2 40 lunar excursion 40 Ed Weiler 40 Jupiter icy moons 40 Context Camera 40 Christa McAuliffe backup 40 IBEX spacecraft 40 broadcaster Walter Cronkite 40 NASA rover Spirit 40 six wheeled rover 40 zero gravity 40 JPL 40 Fermi telescope 40 Ranging spacecraft 40 ray Space Telescope 40 NEAR Shoemaker 40 Shuttle Radar Topography 40 Kepler Mission 40 Bob Thirsk 40 manned orbital 40 geosynchronous communications 40 tiny meteoroids 40 astronomers 40 Titan IVB 40 simulated Martian 40 fairing atop 40 Admiral Gehman 40 Werner Von Braun 40 ferry SpaceShipTwo 40 Foton M3 spacecraft 40 Deep Impact mission 40 Kazakhstan Baikonur cosmodrome 40 moon Buzz Aldrin 40 SpaceshipTwo 40 NASA Mars Odyssey 40 Paulo Nespoli 40 Apollo lunar module 40 NanoSail D 40 STORRM 40 spacesuits 40 orbiter robotic arm 40 Mössbauer 40 Rosetta spacecraft 40 gamma ray detectors 40 spaceships 40 Landsat satellites 40 Star Trek Scotty 40 exo planets 40 Rick Searfoss 40 engineer Valery Tokarev 40 GSLV rockets 40 Konstantin Feoktistov 40 unpowered landing 40 Sturckow 40 LCROSS spacecraft 40 von Braun 40 planetary embryos 40 LEO satellites 40 Martian Chronicles 40 Comet 9P/Tempel 1 40 HiRISE camera 40 Magnificent Desolation 40 COROT 7b 40 Interior Laboratory GRAIL 40 NASA Jet Propulsion 40 robotic geologists 40 twin Viking landers 40 Ron Dittemore 40 Zhai Zhigang 40 Star Trek creator 40 Mars Surveyor 40 Kaguya probe 40 NASA STEREO 40 Arecibo Observatory 40 astronauts Fei Junlong 40 Lori Garver 40 Russian Orlan MK 40 Martian orbit 40 National Aeronautics 40 Gedmark 40 Ronald Dittemore 40 resident Sandra Magnus 40 JAXA Satoshi Sano 40 Venusian surface 40 Saturn V 40 astronomer Percival Lowell 40 Phoenix lander 40 shuttle Atlantis STS 40 astronauts Nicole Stott 40 astronaut Liu Boming 40 Rick Husband 40 lunar expeditions 40 Charon Pluto 40 Cassini 40 Gemini Apollo Skylab 40 Hubble Space 40 WMAP satellite 40 ST5 40 RQ# 40 Atlantis undocks 40 Simonetta Di Pippo ESA 40 Barbree 40 Russian Mikhail Tyurin 40 Opportunity rovers 40 celestial phenomena 40 ESA Integral 40 shuttle orbiters 40 NASA astronaut 40 interplanetary spacecraft 40 highly elliptical orbits 40 astronaut Rex Walheim 40 KAGUYA 39 Benthic Rover 39 meteoroid 39 onboard Chandrayaan 39 NASA Kepler spacecraft 39 Ashly Costa 39 Galilean satellites 39 HiRISE camera aboard 39 Kaguya spacecraft 39 lunar equator 39 microgravity 39 Robotic Lunar Exploration 39 Gregory Chamitoff 39 crewmate astronaut 39 don spacesuits 39 Saturn moons 39 Chang'eI 39 laser altimeter 39 Orbiter spacecraft 39 Huygens lander 39 windshield wiper maneuver 39 Pearl Harbor survivors 39 Mojzsis 39 optical telescopes 39 Ring Nebula 39 Cosmonauts Sergei Volkov 39 Cosmic Background Explorer COBE 39 www.xprize.org 39 Yury Lonchakov 39 http:/www.nasa.gov/cassini 39 TIROS 39 Sergei Volkov 39 astronaut Piers Sellers 39 Zhang Jianqi 39 reconnaissance orbiter 39 Mariner whizzing 39 Padalka 39 NYSE DENT 39 Trojan asteroids 39 Apollo moonshots 39 director Rick LaBrode 39 schoolteacher Christa McAuliffe 39 NFIRE 39 NASA THEMIS 39 NASA Great Observatories 39 astronaut Timothy Kopra 39 Nasa Kepler 39 Discovery STS 39 explorers 39 SSETI Express 39 Orbital Express 39 martian rocks 39 Fei Junlong 39 winged spacecraft 39 Huygens Probe 39 orbiters landers 39 Planck observatory 39 Meridiani 39 chief Anatoly Perminov 39 spaceflyer 39 Hale Bopp comet 39 unpiloted 39 Discovery liftoff 39 Andrey Borisenko 39 Shenzhou VI spacecraft 39 DE Cayard 39 Charlie Hobaugh 39 spacesuit 39 Colonel Ilan Ramon 39 Russian cosmonauts Fyodor Yurchikhin 39 Operation Paperclip 39 Charles Elachi 39 Columbia Accident Investigation 39 Polar Lander 39 Earth orbiting satellites 39 vomit comet 39 Japan Hayabusa spacecraft 39 Commander Dick Scobee 39 alpha particle X ray 39 Impact Probe MIP 39 smoothest flattest spot 39 executive Seymour Himmel 39 Saturn moon Mimas 39 Nasa Deep Impact 39 NASA Far Ultraviolet 39 plucky rover 39 X ray observatories 39 ESA ERS 39 Geosynchronous 39 lunar lander 39 CAPE CANAVERAL Shuttle Discovery 39 commander George Zamka 39 orbiting telescopes 39 sputnik 39 Alpha Particle 39 Mini Thermal Emission 39 Krimigis 39 orbiting Hubble 39 planemos 39 Soviet Union Yuri Gagarin 39 martian atmosphere 39 interplanetary probes 39 simulate weightlessness 39 Fyodor Yurchikhin 39 Sibrel 39 NASA Spirit rover 39 Astrobotic 39 Dan Tani 39 Space Shuttle STS 39 NASA rover Opportunity 39 noctilucent clouds 39 Shuttle undocks 39 Sojourner Rover 39 broken gyroscope 39 Tim Kopra 39 X #A 39 Tempel 1 39 Hawaii van Dokkum 39 Junichiro Kawaguchi 39 interplanetary 39 Uninhabited Aerial Vehicle 39 Mars Exploration 39 Wernher Von Braun 39 CRISM 39 Meridiani Planum 39 Apophis asteroid 39 Kibo JPM JEM Pressurized 39 UA Lunar 39 X ray telescope 39 Russian cosmonauts Andrei Borisenko 39 spokesman Paul Foerman 39 Fincke Greg Chamitoff 39 orbit 39 spokesperson Allard Beutel 39 lunar orbiter Chang'e 39 Michael Zolensky 39 hematite mineral 39 CAPE CANAVERAL Fla. Spacewalking 39 ROSAT 39 X ray observatory 39 invitees splashed 39 Valery Tokarev 39 unmanned rover 39 Shepherding Spacecraft 39 Dr. Mae Jemison 39 Kaguya 39 Comet Hartley 39 Commander Pam Melroy 39 Code Talkers 39 Altair lunar lander 39 Horizons spacecraft 39 Shuttle Discovery astronauts 39 THEMIS mission 39 Jupiter flyby 39 sister rover Spirit 39 micrometeorite impacts 39 Soyuz spaceship 39 humanoid robot bound 39 engineer Nikolai Budarin 39 http:/saturn.jpl.nasa.gov 39 SLC 3E 39 Martians invading 39 OSIRIS Rex 39 nanosatellite 39 Japanese astronaut Takao 39 specialists Nicole Stott 39 Dynamics Observatory 39 Cassini flyby 39 Saturn rings 39 ESA Herschel 39 protoplanet 39 Halley comet 39 Clyde Tombaugh 39 Lunar Orbiter Image 39 Cassini orbiter 39 Cargo Launch Vehicle 39 commander Gennady Padalka 39 Grechko 39 Stuart Roosa 39 coastal Naro 39 human spaceflight 39 lunar crater 39 shuttle liftoffs 39 Manned missions 39 McNair Ellison Onizuka 38 Shenzhou V spacecraft 38 Muszaphar 38 whiz harmlessly 38 MIT planetary scientist 38 crewmate Buzz Aldrin 38 Keck Observatory 38 Oceansat 2 38 unpowered glider 38 duration spaceflights 38 capsule 38 Astro E2 38 Mars Squyres 38 Omid Hope 38 Minotaur rocket 38 Soviets 38 ESA Rosetta 38 Kepler Telescope 38 Shuttle astronaut 38 Cape Canaveral Fla. 38 Hubble Space Telescopes 38 NASA Educator Astronaut 38 meteor impacts 38 Skylab Mission 38 mooncraft 38 William Readdy 38 Hinode spacecraft 38 thermal tile 38 Imaging Spectroradiometer MODIS instrument 38 Baikonur Cosmodrome Kazakhstan 38 Noachian era 38 telemetry instrumentation 38 Envisat satellites 38 interstellar dust 38 Virgin Galactic VSS Enterprise 38 SuitSat 38 engineer Sandra Magnus 38 Buzz Aldrin Apollo 38 director Chuck Dovale 38 NASA Lunar Crater 38 NASA MErcury Surface 38 astronaut Garrett Reisman 38 GeneSat 38 heavily cratered 38 brightest meteors 38 Jet Propulsion Lab 38 Jovian moons 38 Commander Leroy Chiao 38 Martian crater 38 satellites orbiting Mars 38 Shenzhou capsule 38 ENose 38 SBSS Block 38 Professor Stephen Hawking 38 Taikonauts 38 Col. Pamela Melroy 38 NAVSTAR Global Positioning System 38 BP Piscium 38 LADEE 38 Hubble astronomer 38 exoplanets planets 38 Bahcall 38 Tuskegee airmen 38 NASA Interstellar Boundary 38 Roger Chaffee 38 Earthlings 38 astrophysicist Carl Sagan 38 De Winne 38 turquoise Gabby 38 Planck satellite 38 distant supernovae 38 robotic lander 38 surviving Tuskegee Airmen 38 Relations Observatory STEREO 38 comets 38 Michael Studinger 38 moon Mab 38 celestial bodies 38 Cosmonaut Salizhan Sharipov 38 Asteroid Itokawa 38 cosmonaut 38 Spudis 38 martian 38 Galaxy Evolution 38 Greg Chamitoff