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(Click for frequent words.) 61 Ted Molczan 54 Krimigis 52 Dalcanton 52 Sirangelo 51 planetary Transits 51 Saturn Cassini 51 Jenniskens 50 William Gerstenmaier 50 orbital rendezvous 50 Werthimer 49 Spudis 49 amateur skywatchers 49 ROSAT 49 DISR 49 Klinkrad 49 spaceborne 49 Konacki 49 Tryggvason 48 orbiting Hubble Space Telescope 48 Oliver Knickel 48 Convection Rotation 48 ESA ERS 48 reconaissance 48 Comet Halley 48 Fermi telescope 48 Mars landers 48 Foton M3 48 deorbiting 48 Aqua satellite 48 Dittemore 48 Mars Reconnaissance Orbiter MRO 47 NFIRE satellite 47 reconnaissance satellites 47 Starfire Optical Range 47 Marsis 47 Paglen 47 Bill Readdy NASA 47 spacecraft 47 NASA EPOXI mission 47 Maussan 47 Elenin 47 Cassini Huygens 47 Mars Squyres 47 satellites 46 extraterrestrial civilizations 46 unmanned spaceplane 46 Foing 46 Shenzhou spacecraft 46 CoRoT satellite 46 Zarnecki 46 AAVSO 46 Mars orbiting spacecraft 46 laser altimeter 46 Winglee 46 ROCSAT 2 46 alien spacecraft 46 comet flyby 46 Gaensler 46 geostationary orbits 46 twin STEREO spacecraft 46 infrared telescopes 46 NROL 46 orbiter Mars Odyssey 46 Ryschkewitsch 46 radiosonde 46 Rosaly Lopes 46 Spergel 46 SpaceShip One 46 Werner von Braun 46 TRMM satellite 46 manned lunar missions 46 Grechko 46 Lapen 46 Earth orbiting satellites 46 alien civilizations 46 WISE infrared 45 Pillinger 45 geostationary communications 45 THEMIS satellites 45 Rosetta spacecraft 45 SBSS Block 45 exoplanets planets 45 Wernher Von Braun 45 Huygens spacecraft 45 Oleg Antonov 45 spy satellites 45 KAGUYA 45 NASA Landsat 45 NASA Cosmic Background 45 Apollo missions 45 Professor Pillinger 45 AERONET 45 Reneke 45 Voyager spacecraft 45 ANUSAT 45 NASA 45 stellar occultation 45 Aerial photography 45 Deep Impact comet 45 Lunar Reconnaissance Orbiter LRO 45 NASA Far Ultraviolet 45 Viking landers 45 Sasselov 45 Rosetta orbiter 45 satellites orbiting 45 TerraSAR X satellite 45 Nasa Kepler 45 orbiting satellites 45 P/# A2 45 X ray observatory 45 Chodas 45 Evolution Explorer 45 SpaceWeather.com 45 gamma ray detectors 45 IBEX spacecraft 45 meteoroid 45 Szymany airport 45 orbiter Cassini 45 Wolszczan 45 astrophysical phenomena 45 astronomical observations 45 Helios 2B 45 Uninhabited Aerial Vehicle 45 Galileo spacecraft 45 NASA THEMIS 45 director Gene Kranz 45 Apollo Lunar Module 45 interplanetary spacecraft 45 Fred Espenak 45 exo planets 45 Gehrels 44 NASA WMAP 44 Huchra 44 Nasa spacecraft 44 astrometric 44 Synthetic Aperture Radar 44 NASA LCROSS 44 Schawinski 44 Epsilon Eridani 44 Global Surveyor 44 SeaWiFS 44 altimetry 44 satellites orbiting Earth 44 Arecibo Observatory 44 orbiting 44 asteroid Steins 44 NPO Lavochkin 44 Moderate Resolution Imaging 44 SIRTF 44 Comet Encke 44 Metop 44 rover panoramic 44 Mars orbiters 44 geosynchronous orbits 44 ESA Planck 44 Langewiesche 44 interstellar distances 44 NASA GeneSat 1 44 HAMSAT 44 Explorer WISE 44 laser altimetry 44 NASA Wilkinson Microwave 44 Shenzhou spaceships 44 Jedicke 44 Huygens descent 44 Operation Paperclip 44 aboard ESA Envisat 44 STSS Demonstration 44 Nasa 44 amateur astronomers 44 Kochersberger 44 Basiago 44 GeneSat 44 Curiosity rover 44 manned lunar landing 44 Astronaut Leroy Chiao 44 Martian rover 44 Canadarms 44 unpiloted aircraft 44 comet Hale Bopp 44 NFIRE 44 orbiting spacecraft 44 Viking Lander 44 Anisotropy Probe WMAP 44 NASA CloudSat 44 Foton M2 44 MN4 44 Spitzer infrared 43 OSTM Jason 2 43 ufologists 43 Ed Weiler 43 Isro 43 Climate Experiment GRACE 43 Giovanni Cassini 43 Kepler spacecraft 43 Chang'eI 43 GALEX 43 radar altimeters 43 Spaceweather.com 43 commander Pam Melroy 43 SpaceX Dragon 43 ESO astronomer 43 director Rick LaBrode 43 Kliper 43 UFOlogists 43 CHIPSat 43 BFRO 43 Fomalhaut b 43 manned Shenzhou 43 SumbandilaSat 43 orbiter 43 SOHO spacecraft 43 NanoSail D 43 flyby Cassini 43 HiRISE 43 Gerard Kuiper 43 Infrared Astronomical Satellite IRAS 43 Sara Seager 43 Huygens mission 43 flyby spacecraft 43 Wilkinson Microwave Anisotropy Probe 43 celestial observations 43 YES2 43 robotic Canadarm 43 Cassini ultraviolet 43 Space Agency 43 Deep Impact flyby spacecraft 43 Hubble Space Telescope HST 43 exoplanetary 43 NASA STEREO 43 Ground penetrating radar 43 Emily Lakdawalla 43 Envisat satellite 43 Cassini 43 highly elliptical orbits 43 ESA Integral 43 Spaceguard 43 Reconnaissance Orbiter 43 geosynchronous satellites 43 ESA Proba 43 Parcak 43 lunar landers 43 Allan Cheuvront 43 Operation IceBridge 43 Cartosat 2A 43 RXTE 43 Synthetic Aperture Radar SAR 43 Mars Orbiter Camera 43 Garlasco 43 Martian rovers 43 THEMIS spacecraft 43 exo planet 43 Murrett 43 Galaxy Evolution 43 ESA Envisat satellite 43 Comet Hartley 2 43 NASA Voyager spacecraft 43 ESA Envisat 43 Ikonos 43 reconnaisance 43 electromagnetic signals 43 Orbital Express 43 Epsilon Aurigae 43 comet chaser 43 antisatellite weapon 43 orbit 43 planemos 43 Marchis 43 Smos 43 Abdalati 43 NASA Cassini orbiter 43 ufologist 42 Machholz 42 QSOs 42 polarimetric 42 TOPEX Poseidon 42 William Gerstenmaier NASA 42 SCIAMACHY 42 hyperspectral sensors 42 Jerrie Cobb 42 space.com 42 Tombaugh 42 SCISAT 42 Eagle lunar lander 42 NASA Jet Propulsion Lab 42 Laura Grego 42 Herbig Haro 42 infrared spectrometers 42 Odyssey orbiter 42 ENose 42 Berinstain 42 crewed spacecraft 42 Pancam 42 gamma ray observatory 42 orbiting Mars 42 satellite 42 infrared astronomy 42 Thule Greenland 42 telescope 42 SuitSat 42 Radarsat 42 Ultraviolet Imaging Spectrograph UVIS 42 radar altimetry 42 SARSAT 42 Nasa Mars Odyssey 42 spacecrafts 42 NASA Kepler telescope 42 Starfire telescope 42 Squyres Cornell 42 Galilean satellites 42 UFO 42 Rusty Schweickart 42 Martian terrain 42 Mamoru Mohri 42 Arkani Hamed 42 RHESSI 42 Nasa Mars Reconnaissance 42 Mars Pathfinder lander 42 geosynchronous 42 Tereshkova 42 TecSAR 42 Astronaut Lopez Alegria 42 EPOXI spacecraft 42 LRO spacecraft 42 cosmic microwave radiation 42 Harry Shoup 42 COSPAS 42 OGLE TR #b 42 Pilot George Zamka 42 APXS 42 radiosondes 42 Comet Hartley 42 Cryosat 42 minisub 42 Mini Thermal Emission 42 rocky extrasolar planet 42 Piers Sellers 42 TECSAR 42 spokesman Michael Braukus 42 planetary missions 42 Hadow 42 ESA GOCE 42 LEO satellites 42 Orbiter LRO 42 steering wheel tilts 42 remote sensing satellites 42 NASA Kepler spacecraft 42 SSETI Express 42 chemtrails 42 ionospheric 42 occultations 42 UKIRT 42 Mars Orbiter 42 astrometry 42 VIRTIS 42 Peenemunde 42 UFO phenomena 42 Phobos Grunt 42 F. Readdy NASA 42 infrared imagery 42 TerraSAR X 42 Planck telescope 42 Theodore von Karman 42 Landsat satellites 42 Global Surveyor spacecraft 42 Lunokhod 42 NAVSTAR Global Positioning System 42 irregularly shaped asteroid 42 XMM Newton satellite 42 Mission TRMM satellite 42 Scannon 41 MidSTAR 41 skywatcher 41 unmanned probes 41 Lt. Col. Yang Liwei 41 Léopold Eyharts 41 geo synchronous 41 cryptologic 41 RISAT 41 Fermi Large 41 Rosetta comet 41 NASA Wallops Flight 41 NOAA GOES 41 Leonid meteor showers 41 NASAs 41 Juneau Katsuya 41 RAS Observatory 41 Infrared Mapping Spectrometer VIMS 41 reconnaissance 41 EPOXI mission 41 Herschel telescope 41 Story Musgrave 41 NASA Lunar Prospector 41 Soyuz spaceship 41 Kepler Mission 41 Jupiter moons 41 CALIPSO 41 gamma ray spectrometer 41 A'Hearn 41 radar altimeter 41 Sushil Atreya 41 gravitational microlensing 41 stratospheric balloon 41 MC #P 41 orbiters 41 chemtrail 41 Commander Gennady Padalka 41 Modher 41 NASA Cassini 41 moonwalkers 41 X #B 41 unmanned reconnaissance aircraft 41 Nasa astronaut 41 radars telemetry 41 microlensing events 41 Descent Imager Spectral Radiometer 41 Petruna 41 Solar TErrestrial RElations Observatory 41 Dyna Soar 41 extrasolar worlds 41 Anthony Remijan 41 ESOC 41 Philae lander 41 ESA Huygens 41 Composite Infrared Spectrometer 41 Owen Garriott 41 intergalactic spaceship 41 Vakoch 41 sigint 41 William Readdy NASA 41 de Winne 41 Formosat 2 41 Mandushev 41 KBOs 41 XMM Newton 41 Hörst 41 Cernan 41 Niiler 41 Herschel Planck 41 David Southwood ESA 41 infrared ultraviolet 41 GeneSat 1 41 Nasa Deep Impact 41 RADARSAT 2 41 Lieutenant Colonel Yang Liwei 41 unmanned Predator aircraft 41 engineer Nikolai Budarin 41 extraterrestrial visitation 41 Mars Odyssey spacecraft 41 Binzel 41 QuikSCAT 41 submillimeter wavelength 41 Obering 41 Derek Hassmann 41 spacecraft orbiting 41 retroreflector 41 extraterrestrial origin 41 Rathnasree 41 contactees 41 ESA Herschel 41 SpaceX Dragon capsule 41 AB Aurigae 41 orbiting telescope 41 orbiter robotic arm 41 exhaust plume 41 Bioastronautics Roadmap 41 GOES satellites 41 Foulois 41 Thales Alenia 41 Tegmark 41 astronomers 41 DEW Line 41 thruster firings 41 Imaging Spectroradiometer MODIS instrument 41 Robert Sarmast 41 Compton Gamma Ray 41 ISRO 41 Optical Gravitational Lensing Experiment 41 Cassini Huygens spacecraft 41 Kuiper belt objects 41 Planetary Transits 41 Mössbauer 41 spiral nebulae 41 Ulysses spacecraft 41 Roswell UFO 41 Tomasko 41 RISAT 2 41 Schwehm 41 Planck satellite 41 Heliospheric Observatory SOHO 41 Faint Object 41 Rob Navias 41 STEREO spacecraft 41 Shostak 41 Bramley Murton 41 Delta Cephei 41 DMSP F# 41 NEAR Shoemaker 41 NASA Kepler 41 Divine Vessel 41 UAVSAR 41 Lunar Excursion Module 41 Geminga 41 diazepam pharmacy 41 Ocean Surface Topography 41 satellite imagery 41 HiRISE camera 41 neutrino particles 40 Mars Opportunity rover 40 Huygens 40 robotic spacecraft 40 planetary astronomer 40 dummy warheads 40 ExoMars rover 40 geosynchronous Earth 40 Tarnak Farm 40 asteroids WISE 40 Christiaan Huygens 40 Sojourner rover 40 Huygens lander 40 TanDEM X 40 Des Marais 40 Taylor Dinerman 40 celestial phenomena 40 Viking orbiters 40 GPS 2R 40 Stuhlinger 40 ARGUS IS 40 Cancri e 40 ENVISAT 40 Rosaviakosmos 40 robotic landers 40 optical telescopes 40 Cosmic Microwave Background 40 Landsat images 40 Toutatis 40 spaceplane 40 Gorevan 40 Kuiper Belt Objects 40 Galex 40 extraterrestrial civilization 40 SOHO LASCO 40 Lunine 40 MESSENGER spacecraft 40 Higgs bosons 40 CloudSat 40 Konstantin Tsiolkovsky 40 SMOS 40 contactee 40 Mars Pathfinder 40 remotely piloted aircraft 40 Minotaur rocket 40 Edwin Hubble 40 Satellites GOES 40 Space.com 40 Unmanned aerial 40 AgCam 40 THEMIS 40 Ernst Stuhlinger 40 ALMA antennas 40 polar orbits 40 Von Braun 40 de Pater 40 Spaceflight 40 WMAP satellite 40 National Aeronautic 40 WISE telescope 40 Arjangi 40 Pierre Babinsky 40 unmanned aerial drone 40 Mars Color Imager 40 smallest exoplanet 40 Churyumov Gerasimenko 40 Ray Jayawardhana 40 spaceweather.com 40 Envisat satellites 40 Oceansat 2 40 Navias 40 Titan flyby 40 Cassini Imaging 40 vomit comet 40 Ufologists 40 Spy satellites 40 Gamma ray Large 40 extravehicular activities 40 alien spaceships 40 Rick Oborn 40 orbital 40 ESA XMM Newton 40 Skynet 5C 40 NAOMS 40 Mission SRTM 40 UFOs 40 Mars moon Phobos 40 manager Ron Dittemore 40 Otto Lilienthal 40 Amateur astronomers 40 lander rover 40 astronautical engineer 40 Verbiscer 40 unmanned robotic 40 Paczynski 40 dexterous robot 40 PAVE PAWS 40 martian meteorites 40 Earth orbit 40 asteroid Itokawa 40 Suzaku X ray 40 gamma ray pulsars 40 Comet Lulin 40 Stardust spacecraft 40 Clementine spacecraft 40 geosynchronous satellite 40 Hipparchus 40 sextants 40 aerial reconnaissance 40 geosynchronous GEO 40 Gutoski 40 cosmic phenomena 40 Starstream Research 40 retrograde orbit 40 SIGINT 40 Martian lander 40 gamma ray flashes 40 altimeters 40 Birnes 40 FORCAST 40 Infrared Pathfinder Satellite 40 MARSIS radar 40 shuttle orbiter 40 WFC3 40 NEAs 40 probe Huygens 40 Lunar Module Pilot 40 Endeavour docked 40 telescopes 40 manned orbital 40 Musey 40 NASA MESSENGER 40 Sounder AIRS instrument 40 journal Acta Astronautica 40 ephemeris 40 Earthlike planets 40 synthetic aperture radar 40 Glomar Explorer 40 Mini SAR 40 radial velocity 40 spacecraft flyby 40 LORRI 40 COROT 40 sterile neutrino 40 Jeffrey Richelson 40 Karkow 40 moonquakes 40 THAAD radar 40 QuikScat failed 40 Lunar Orbiter 40 Hubble orbits 40 CALIPSO satellites 40 StarDate 40 Mercury Redstone 39 ScanEagle 39 Schweickart 39 Iridium satellites 39 Martian meteorite 39 Dick Fadden 39 CENTAF 39 Gliemeroth 39 Delfi C3 39 William Bottke 39 Fermi LAT 39 Predator unmanned 39 nanosatellite 39 stellar occultations 39 Foton spacecraft 39 Global Differential GPS 39 Galileo satellites 39 supersonic jets 39 Gamma ray burst 39 Anik F2 39 NASA MODIS 39 Sobakam 39 Reflection Radiometer 39 Jean Pierre Lebreton ESA 39 STSS satellites 39 Yosef Yagur 39 Ariane launcher 39 Saturn outermost moon 39 Planck spacecraft 39 millisecond pulsar 39 Boethin 39 IAI Heron 39 inner Oort Cloud 39 O OREOS 39 EC #J 39 spyplanes 39 Remote sensing 39 ESA Rosetta 39 Spacewatch 39 N. Rathnasree 39 MZ 3A 39 astronomical telescopes 39 JAXA 39 Giove B 39 sonar arrays 39 electric ion propulsion 39 rocketeer 39 aimless nobodies 39 Aerosonde 39 ESO VLT 39 ScanEagle unmanned aerial 39 ESA Mars 39 Kounotori 39 Maunder minimum 39 Manned Spacecraft Center 39 Michael Studinger 39 exosolar planets 39 Venlet 39 Unidentified Flying Objects 39 Percival Lowell 39 Atlantis undocks 39 Franco Bonacina 39 Manescalchi 39 Upsilon Andromedae b 39 collectSPACE.com 39 GSTB V2 39 S. Lindzen 39 Conselice 39 datalinks 39 Cloud Aerosol Lidar 39 Squyres 39 observational astronomy 39 panchromatic camera 39 Cartosat 2B 39 LAGEOS 39 Thomas Harriot 39 Clementine bi static 39 Sigurd Hofmann 39 TrES 4 39 Hubble Space 39 Lelaie 39 meteorite craters 39 Project Ozma 39 refrozen ice 39 Zubrin 39 polar orbiting satellites 39 astronomer Tycho Brahe 39 Lunar CRater Observation 39 faraway galaxies 39 Infrared Astronomical Satellite 39 Heidemarie M. 39 reconnaissance missions 39 Gliese #c 39 windshield wiper maneuver 39 Orbiter MRO 39 dropsonde 39 Bill Birnes 39 Jamie Elsila 39 orbited 39 planets asteroids 39 astronaut Piers Sellers 39 Fermi Gamma ray 39 Ring Nebula 39 Kepler observatory 39 aerosol measurements 39 Orbiter 39 unmanned aerial vehicle 39 planet Gliese #g 39 Faulkes Telescope 39 LCROSS 39 NASA ICESat 39 NASA Cassini spacecraft 39 Huygens Probe 39 EPLRS 39 auroral emissions 39 Predator UAVs 39 SBSS satellite 39 CoRoT 39 hypersonic jet 39 Infrared Astronomy SOFIA 39 Giovanni Schiaparelli 39 STEREO mission 39 extraterrestrial UFO 39 Shuttle Radar Topography 39 astrophysicists 39 gyrocopters 39 GOCE satellite 39 CoRoT 9b 39 France Le Triomphant 39 O. Hobaugh 39 robotic rovers 39 orbits 39 Papovich 39 EP 3E 39 Submillimeter Array 39 orbital insertion 39 parabolic microphones 39 distant quasars 39 GPS co ordinates 39 Miqani 39 Uzi Rubin 39 Kurs automated 39 NASA Gamma ray 39 Saturn moon Mimas 39 Hubble Space telescope 39 LOFAR 39 GPS satellites 39 TRMM Microwave Imager TMI 39 Corey Hinderstein 39 pilotless Predator 39 APRS 39 Shenzhou V 39 scatterometer 39 uncrewed 39 Frederic Pont 39 Cospas Sarsat 39 Ken Edgett 39 TIROS 39 Rivet Joint 39 ASTRON 39 Stéphane Udry 39 satellite altimetry 39 GOES O 39 Lunar Prospector 39 Phased array 39 Comet Hale Bopp 39 Cassini spacecraft orbiting 39 SIM PlanetQuest 39 Earth orbit LEO 39 hypervelocity 39 robotic explorer 39 Vomit Comet 39 extraterrestrials 39 extrasolar planet 39 Remotely Operated Vehicle 39 Quadrantids 39 Kurniadi 39 lunar landings 39 lunar landing 39 Rockot 39 Titan IVB 39 Bottke 39 Hubble 39 Gravity Probe 38 SPICAM 38 microsatellites 38 Van Arkel 38 Yaogan 38 Aurigid meteor shower 38 geostationary satellites 38 lander 38 RC #S 38 Jakosky 38 lunar explorer 38 Kiruna Sweden 38 astronomer Seth Shostak 38 Samokutyayev 38 ESO telescopes 38 outermost planets 38 Hess von Kruedener 38 ESO Paranal Observatory 38 radial velocity technique 38 Fengyun 1C 38 Autosub# 38 Tarnak Farms 38 Kuiper Airborne 38 Tarduno 38 spy 38 Shenzhou capsule 38 extrasolar 38 Endeavour undocks 38 High Resolution Imaging 38 MARSIS 38 Lebacqz 38 telescopic observations 38 VORTEX2 38 Mars orbiter 38 hypersonic glider 38 Geoff Rezek 38 frequency VLF 38 polar orbiting 38 JTF2 38 Express orbiter 38 SES Americom AMC 38 George Djorgovski 38 habitable worlds 38 von Weyhe 38 flyby 38 director Charles Elachi 38 unmanned reconnaissance 38 Kucharek 38 jovian 38 spacecraft SpaceShipTwo 38 Kuiper Belt Object 38 Stassun 38 interstellar particles 38 http:/www.nasa.gov/cassini 38 Svoray 38 astronomer Percival Lowell 38 polar orbit 38 Space Telescope 38 Predator UAV 38 agency Roskosmos 38 OSIRIS Rex 38 Kuchner 38 Task Force ODIN 38 Mars Odyssey orbiter 38 Lee Joo jin 38 inertial guidance 38 Willie McCool 38 gradiometer 38 National Reconnaissance 38 Tropical Rainfall Measuring 38 airship 38 Context Camera 38 imaging spectrometer 38 Payload Operations Center 38 ESA SMART 38 NASA rovers 38 unmanned Predator spy 38 ray Space Telescope 38 Walter Schirra 38 amateur astronomer 38 Space Shuttle STS 38 GPS Block IIF 38 U 2s 38 WISE spacecraft 38 Auguste Piccard 38 Sojourner Rover 38 Mars rover 38 Mars Lander 38 GOSAT 38 spectroscopic measurements 38 heavily cratered 38 SpaceshipTwo 38 Jacques Piccard 38 Avishay Gal Yam 38 Khvorov 38 HiRISE camera aboard 38 hypersonic scramjet 38 De Pater 38 orbit GEO 38 lunar surface 38 quantum teleportation 38 LADEE 38 ornithopter 38 lidar 38 X ray observatories 38 spectrographic 38 comet Wild 38 Popovkin 38 exobiology 38 reconnaissance drones 38 skywatchers 38 Gadaf spoke 38 noctilucent clouds 38 TRMM 38 SN #D 38 Syun Ichi Akasofu 38 Scheeres 38 Hayabusa probe 38 EADS Astrium GmbH 38 Gen. Vladimir Popovkin 38 Charles Elachi 38 DART spacecraft 38 penetrating radar 38 Stratellite tm 38 Galileo constellation 38 Josefino Comiso 38 unmanned rotorcraft 38 Diviner instrument 38 possible micrometeorite damage 38 Advanced Microwave Scanning 38 delta winged 38 Ion propulsion 38 Michoud La. 38 Mercury flyby 38 Gad Shimron 38 VISTA telescope 38 Silver Dart 38 NASA Wallops 38 Comet 9P/Tempel 1 38 Comet NEAT 38 X #B Orbital 38 Helios Prototype 38 AKARI 38 Imaging Spectrometer 38 dense Nallamalla forest 38 Tranquada 38 geostationary satellite 38 Halley comet 38 Jeffrey T. Richelson 38 Gregory Chamitoff carbon dioxide 38 shuttle Discovery STS 38 SAR Lupe 38 YU# 38 orbiting Hubble telescope 38 Opportunity Mars rovers 38 Bonneville Crater