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(Click for frequent words.) 70 Mars Reconnaissance Orbiter 69 HiRISE camera 68 CRISM 66 LROC 66 Mars Orbiter Camera 65 THEMIS 65 HRSC 64 Resolution Imaging 63 DISR 63 Alfred McEwen 62 HiRISE images 62 Mars Color Imager 62 Cassini 62 Cassini radar 62 Pancam 61 High Resolution Imaging 61 Mars CRISM 61 HiRISE image 61 Context Camera 61 HiRISE camera aboard 60 Lunar Reconnaissance Orbiter Camera 60 NASA Mars Reconnaissance 60 Lunar Reconnaissance Orbiter LRO 60 Mars Reconnaissance Orbiter MRO 60 LRO 60 Martin Tomasko 59 microscopic imager 59 Saturn Cassini 59 MARSIS 59 VIRTIS 59 Orbiter MRO 59 COROT 59 NASA Cassini 59 Science Experiment HiRISE 59 infrared mapping spectrometer 58 GALEX 58 MESSENGER 58 Descent Imager Spectral Radiometer 58 Planetary Laboratory 58 Mission SRTM 58 Explorer WISE 58 Orbiter LRO 58 Hubble 58 Mars Orbiter 58 imaging spectrometer 58 LORRI 57 Shuttle Radar Topography 57 Nasa Mars Reconnaissance 57 orbiting Mars 57 rover panoramic 57 Martian surface 57 Mercury flyby 57 Spacewatch 57 NASA Goddard 57 Hubble observations 57 EPOXI 57 Mini TES 57 telescope 57 GOCE 57 Cassini imaging 56 Compact Reconnaissance Imaging Spectrometer 56 NASA Cassini spacecraft 56 Landsat satellite 56 NASA Lunar Reconnaissance 56 ESA Mars 56 laser altimeter 56 Robotic Arm Camera 56 panoramic camera 56 ESA Envisat satellite 56 Kepler Mission 56 Cassini Huygens 56 ESA SMART 56 WFC3 56 Resolution Stereo Camera 56 ESA Rosetta 55 http:/saturn.jpl.nasa.gov 55 Solar Dynamics Observatory 55 Mars Global Surveyor 55 APXS 55 Planetary Science Institute 55 Phobos 55 SMOS 55 NASA EPOXI mission 55 Valles Marineris 55 UAVSAR 55 Viking Lander 55 TerraSAR X 55 Galaxy Evolution 55 EPOXI mission 55 flyby spacecraft 55 ChemCam 55 JPL 55 composite infrared spectrometer 55 Surface Stereo Imager 55 flyby 54 Comet Hartley 54 Cassini Imaging 54 orbiting Hubble Space Telescope 54 CloudSat 54 NASA Jet Propulsion Laboratory 54 Space Telescope 54 Thermal Emission Imaging 54 solar corona 54 FORCAST 54 Olympus Mons 54 Cassini spacecraft 54 phyllosilicates 54 LCROSS 54 ESA Envisat 54 Mars Odyssey 54 OMEGA instrument 54 XMM Newton 54 Mastcam 54 UA Lunar 54 infrared astronomy 54 NASA Interstellar Boundary 54 Carolyn Porco 54 de Pater 54 spectrometer 54 Huygens mission 54 Shallow Radar instrument 53 Microscopic Imager 53 Moderate Resolution Imaging 53 Martian landscape 53 DIXI 53 MODIS 53 Fomalhaut b 53 martian surface 53 Comet Hartley 2 53 NASAs 53 Ken Edgett 53 noctilucent clouds 53 infrared telescopes 53 Hubble Ultra 53 Composite Infrared Spectrometer 53 Landsat satellites 53 NASA STEREO 53 telescopes 53 Wilkinson Microwave Anisotropy Probe 53 Rosetta orbiter 53 Venusian surface 53 ESA Herschel 53 Galileo spacecraft 53 Jet Propulsion Laboratory 53 EPOCh 53 optical microscope 53 MMT Observatory 53 orbiting observatories 53 QuickBird 53 Rosetta spacecraft 53 LASP 53 Telescope BAT 53 submillimeter wavelength 53 Infrared Mapping Spectrometer 53 Panoramic Camera 53 Thermal Emission Spectrometer 53 Adaptive Optics 53 OSIRIS REx 53 Spaceweather.com 53 Jonathan Lunine 53 UKIRT 53 Saturn rings 52 AKARI 52 cometary nucleus 52 Near Infrared Camera 52 STScI 52 MESSENGER spacecraft 52 SOHO spacecraft 52 visit http:/saturn.jpl.nasa.gov 52 Global Surveyor 52 RXTE 52 Advanced Synthetic Aperture 52 Relations Observatory STEREO 52 Orbiter 52 NASA Wilkinson Microwave 52 gamma ray spectrometer 52 Keck Interferometer 52 Uninhabited Aerial Vehicle 52 KAGUYA 52 NICMOS 52 Synthetic Aperture Radar SAR 52 Mars landers 52 http:/www.nasa.gov/cassini 52 heavily cratered 52 fainter objects 52 multispectral 52 orbiting Saturn 52 THEMIS satellites 52 Reflection Radiometer 52 spacecraft orbiting 52 Keck Observatory 52 lander 52 spaceweather.com 52 Landsat 52 SIRTF 52 infrared telescope 52 Mars Surveyor 52 NASA Mars Orbiter 52 Comet Lulin 52 Hubble Space Telescope 52 Jenniskens 52 Arecibo Observatory 52 Huygens 52 comet 52 astronomical objects 52 NEOWISE 52 Planck satellite 52 situ measurements 52 inch Samuel Oschin 52 NASA WMAP 52 ESO VLT 52 Steward Observatory 52 Fermi Gamma ray 52 AAVSO 52 WIYN 52 Mars Climate Sounder 52 WISE telescope 52 Envisat 52 Lunar Reconnaissance Orbiter 52 spectrographic 52 Kitt Peak 52 Meridiani 52 Ultraviolet Imaging Spectrograph 52 Emily Lakdawalla 52 NOAO 52 Evolution Explorer 52 planetary scientist 52 telescopic observations 52 ESA Integral 51 Candor Chasma 51 NASA MESSENGER 51 Pan STARRS 51 orbiting spacecraft 51 HUDF 51 Herschel Space 51 Cassini flyby 51 Reconnaissance Orbiter 51 IBEX spacecraft 51 Sasselov 51 Hubble Telescope 51 lunar surface 51 SHARAD 51 astrometric 51 Very Large Telescope 51 Fermi telescope 51 Saturnian moon Titan 51 radar altimetry 51 Aqua satellite 51 Cassini ultraviolet 51 Cassini Huygens spacecraft 51 Mars orbiting spacecraft 51 Lunar Orbiter 51 hyperspectral 51 TRMM satellite 51 GigaGalaxy Zoom 51 rover 51 martian landscape 51 ESO PR 51 Observatory SDO 51 comet flyby 51 Jennifer Heldmann 51 JWST 51 Hubble Space Telescope HST 51 comet nucleus 51 Mars Pathfinder 51 Spitzer Space Telescope 51 astrometry 51 ESA Planck 51 Imaging Spectrometer 51 Rosetta lander 51 lunar topography 51 ICESat 51 synthetic aperture radar 51 Larry Soderblom 51 ESOC 51 STEREO spacecraft 51 HiRise camera 51 Solar Dynamics 51 Planetary Camera 2 51 Pluto Charon 51 IKONOS 51 orbiter 51 CoRoT satellite 51 infrared interferometry 51 RHESSI 51 CALIPSO 51 Mars Rover 51 Comet Halley 51 Mars rover 51 Planetary Lab 51 infrared spectra 51 Saturnian moons 51 planetary science 51 Surveys ACS 51 Solar Orbiter 51 Nasa Jet Propulsion 51 Radar ASAR 51 astrophotographer 51 radio occultation 51 Optical Microscope 51 LCROSS mission 51 asteroid Eros 51 Mini SAR 51 ESO telescopes 51 NASA Mars Odyssey 51 planetary Transits 50 Saturn moon Enceladus 50 WFPC2 50 NIRSpec 50 Solar TErrestrial RElations Observatory 50 Stardust NExT 50 TanDEM X 50 spectroscopic observations 50 Diviner 50 STEREO 50 Ultraviolet Imaging Spectrograph UVIS 50 Laser Interferometer Gravitational Wave 50 infrared spectrometer 50 Keck telescopes 50 KBOs 50 exoplanetary 50 Thermal Emission 50 Mini Thermal Emission 50 NASA Aqua 50 Telescope 50 Mars Odyssey spacecraft 50 WISE spacecraft 50 Lowell Observatory 50 Keck Telescope 50 Cometary 50 Cydonia region 50 ESO Very Large Telescope 50 adaptive optics 50 gaseous planet 50 SDSS II 50 Saturn moon 50 Envisat satellite 50 Planetary Fourier Spectrometer PFS 50 orthorectified 50 NASA THEMIS 50 NASA Solar Terrestrial 50 ESA XMM Newton 50 extrasolar planet 50 LADEE 50 Krimigis 50 Mars Exploration 50 EPOXI spacecraft 50 Hubble telescope 50 ENVISAT 50 MODIS Rapid Response 50 Planck 50 stellar occultation 50 astronomers 50 Cosmic Evolution 50 Neutral Mass Spectrometer 50 Reflection Radiometer ASTER 50 Ikonos 50 ESO Paranal Observatory 50 Lunine 50 extrasolar 50 Kuiper belt objects 50 Heliospheric Observatory SOHO 50 Martian arctic 50 SPICAM 50 Werthimer 50 NASA Cosmic Background 50 NASA Far Ultraviolet 50 coronagraph 50 Slooh 50 spectrographs 50 THEMIS Images 50 ESA Huygens probe 50 WMAP satellite 50 InSAR 50 NASA ICESat 50 Mars Odyssey orbiter 50 Gemini Observatory 50 martian 50 Mössbauer 50 Hipparcos 50 NASA Moon Mineralogy 50 Tropical Rainfall Measuring 50 Area Telescope LAT 50 infrared wavelengths 50 OGLE 50 asteroid Vesta 50 LCROSS Observation Campaign 50 TRMM 50 scanning electron microscope 50 Gravitational lensing 50 exoplanet 50 Mars orbiters 50 Multi Object Spectrometer 50 Heliophysics 50 Mars 50 Synthetic Aperture Radar 50 Microscopy Electrochemistry 50 planetary geologist 50 UVOT 50 NASA MODIS 50 extrasolar planets 50 INMS 50 Ranging MESSENGER spacecraft 49 Advanced Microwave Scanning 49 Convection Rotation 49 Mars Orbiter Laser Altimeter 49 Burst Alert 49 Erik Asphaug 49 SkyCenter 49 Lunar Prospector 49 Global Surveyor spacecraft 49 polarimetric 49 infrared imagery 49 Saturnian system 49 interferogram 49 gamma ray observatory 49 Earth orbiting satellites 49 observatories 49 Upsilon Andromedae 49 polar vortex 49 NASA Infrared Telescope 49 Imaging Spectroradiometer MODIS instrument 49 Hakan Svedhem 49 Infrared Mapping Spectrometer VIMS 49 Carey Lisse 49 Deep Impact eXtended Investigation 49 X ray observatory 49 Huygens descent 49 LSST 49 extrasolar planetary systems 49 Fermi Large 49 WM Keck Observatory 49 Titan flybys 49 LRO spacecraft 49 MARSIS radar 49 Martian craters 49 NASA 49 SpaceWeather.com 49 spacecraft 49 ray Space Telescope 49 airglow 49 Solar Terrestrial Relations 49 Infrared Thermal Imaging Spectrometer 49 moon Io 49 optical telescopes 49 SECCHI 49 Kounaves 49 telescopic camera 49 MGS Mars Orbiter Camera 49 gravitational lenses 49 Spitzer infrared 49 Comet 9P/Tempel 1 49 Phoenix Mars Lander 49 George Djorgovski 49 spectroscopic 49 NASA Odyssey orbiter 49 Peter Jenniskens 49 Diviner instrument 49 Extragalactic 49 Faint Object 49 Astrophysical 49 Planck telescope 49 binary asteroid 49 CfA 49 asteroid Steins 49 NASA JPL Caltech 49 NASA Jet Propulsion 49 #x magnification [002] 49 comet Hartley 2 49 Nasa spacecraft 49 Grillmair 49 Quickbird 49 Samuel Oschin Telescope 49 ESA ERS 49 Moessbauer spectrometer 49 Meteoritics 49 SRTM 49 Voyager spacecraft 49 YU# 49 microlensing events 49 Photometric Imaging Receiver 49 altimetry 49 Earth Observatory 49 Climate Experiment GRACE 49 dust devils 49 NASA Landsat 49 radar altimeter 49 comets 49 AMASE 49 ESO astronomer 49 cometary 49 flyby Cassini 49 Dalcanton 49 Webb Telescope 49 multiband imaging photometer 49 MINOS 49 NASA Kepler 49 Infrared Array Camera 49 Viking orbiters 49 Kepler spacecraft 49 Telescope LSST 49 multispectral imagery 48 Mossbauer spectrometer 48 Herschel Space Telescope 48 Exoplanet 48 Magnetic Imager HMI 48 NASA Stratospheric Observatory 48 Konacki 48 Infrared Pathfinder Satellite 48 arcminutes 48 scanning electron microscope SEM 48 Endurance crater 48 UCO Lick 48 Neukum 48 Mars orbiter 48 F#W 48 AB Aurigae 48 Martian meteorites 48 A'Hearn 48 laser altimetry 48 Ken Herkenhoff 48 infrared spectrograph 48 Pasachoff 48 Michael Studinger 48 meteoroid 48 observatory 48 moon Charon 48 Valles Marineris canyon 48 Meridiani Planum 48 Mission TRMM satellite 48 credit NASA JPL 48 Gazarik 48 Epsilon Aurigae 48 Jeffrey Kargel 48 Clementine spacecraft 48 rocky extrasolar planet 48 AMIE camera 48 Ocean Salinity SMOS 48 NEAs 48 Adaptive optics 48 Imaging Spectroradiometer MODIS 48 Lick Observatory 48 NASA Deep Impact 48 Lulin Observatory 48 Titan flyby 48 Cryosat 48 orbiting gamma ray 48 Martian 48 HD#b 48 microlensing 48 GLAST 48 martian soil 48 Mimas 48 Aerial photography 48 Space Physics 48 occultations 48 Huygens probe 48 NASA Stardust spacecraft 48 Orionid 48 STEREO satellites 48 KODAK CCD Image Sensors 48 NanoSail D 48 Corot 7b 48 Enceladus 48 Hinode 48 Stardust NExT mission 48 JAXA 48 Red Planet 48 MetOp 48 Syrtis Major 48 Jean Luc Margot 48 Arsia Mons 48 submillimetre 48 UVIS 48 millimeter wavelengths 48 Robotic Arm 48 X ray telescopes 48 Eric Becklin 48 STEREO mission 48 Kepler telescope 48 rovers 48 NASA CloudSat 48 O OREOS 48 YORP effect 48 NASA Chandra 48 detect gravitational waves 48 Opportunity rover 48 QuickBird satellite 48 Terra Meridiani 48 Image NASA JPL 48 Triangulum Galaxy 48 Mars moon Phobos 48 ROSAT 48 spatially resolved 48 geoid 48 Submillimeter Array 48 planetary missions 48 John Grotzinger 48 thermal emission spectrometer 48 Moderate Resolution 48 Itokawa 48 Ulysses spacecraft 48 Interstellar Boundary Explorer 48 Paranal 48 Omega Centauri 48 NASA JPL 48 rover Opportunity 48 impactor 48 Asteroid Itokawa 48 neutral mass spectrometer 48 polarimetry 48 LOFAR 48 Optical Gravitational Lensing Experiment 48 orbited Jupiter 48 MERIS 48 Spaceguard 48 Earth Observing 48 NASA ESA Hubble 48 ground truthing 48 Foing 48 Astrobiology Institute 48 Gusev crater 48 SSRL 48 SNfactory 48 AU Mic 48 X ray Telescope XRT 48 MG J# +# 48 Carnegie Observatories 48 Cancri e 48 NASA LCROSS 48 AgCam 47 spacecraft flyby 47 gamma ray burst 47 Moderate Imaging Spectroradiometer 47 planetary astronomer 47 Cloud Aerosol Lidar 47 THEMIS Image 47 Kuiper Belt Objects 47 LIGO 47 Stardust spacecraft 47 VISTA telescope 47 Hubble Space 47 Martian equator 47 Proba 2 47 Lunar Orbiter Laser Altimeter 47 NOAA GOES 47 nasa.gov 47 celestial object 47 WISE infrared 47 Jupiter Ganymede 47 Sounder AIRS instrument 47 lobate scarps 47 Philae lander 47 OSIRIS Rex 47 Laboratory Pasadena 47 distant galaxy clusters 47 optical telescope 47 satellite imagery aerial 47 Earth Observation 47 journal Icarus 47 IceCube 47 Large Binocular Telescope 47 spectroscopically 47 NASA rovers Spirit 47 Nasa Kepler 47 scatterometer 47 Martian polar 47 DEIMOS 47 NASA Voyager spacecraft 47 gamma ray detector 47 distant galaxies 47 SPIRE instrument 47 Iapetus 47 OSIRIS 47 Messenger spacecraft 47 spatial resolution 47 remote sensing 47 Churyumov Gerasimenko 47 P/# A2 47 Mossbauer 47 innermost planet 47 Jet Propulsion Laboratory JPL 47 spectrometers 47 infrared wavelength 47 Imaging Spectroradiometer 47 Sojourner Rover 47 galaxy cluster 47 Viking landers 47 infrared spectral 47 asteroid Itokawa 47 resolution panchromatic 47 Total Ozone Mapping 47 retroreflector 47 Keck telescope 47 Deep Impact probe 47 Gerhard Schwehm 47 SDSS III 47 Deep Impact comet 47 Mission TRMM 47 cryovolcanism 47 SeaWiFS 47 infrared spectrometers 47 Interior Laboratory GRAIL 47 Deep Impact flyby spacecraft 47 Cosmic Background Explorer 47 Spectrograph 47 CoRoT 7b 47 NASA GSFC 47 transiting exoplanets 47 Maria Zuber 47 Helioseismic 47 GLAST Burst Monitor 47 Solar Optical Telescope 47 ATLAS detector 47 Mauna Kea Hawaii 47 gravitational lens 47 NASA rovers 47 Cassini ion 47 Chodas 47 NSIDC 47 AERONET 47 Planck spacecraft 47 highly elliptical orbit 47 pulsating aurora 47 Envisat Advanced Synthetic Aperture 47 Terrain Mapping Camera 47 auroral 47 Rover Opportunity 47 bathymetry 47 Planetary Transits 47 Space Telescopes 47 interferograms 47 Extrasolar Planet Observation 47 Earth Asteroid 47 NIRCam 47 GigaPan 47 earthshine 47 orbiting telescope 47 Nasa 47 XMM Newton satellite 47 RS Ophiuchi 47 Arecibo telescope 47 Herschel telescope 47 Mars Lander 47 RRATs 47 Japan NAOJ 47 Gerard Kuiper 47 Moon Mineralogy Mapper 47 Credit NASA JPL 47 Great Observatories 47 Field Imager 47 NASA Ames 47 mineralogical composition 47 ARGUS IS 47 ejecta 47 NASA Jet Propulsion Lab 47 Chilean Atacama Desert 47 Decadal Survey 47 planets orbiting 47 SCIAMACHY 47 Kepler 47 spacecraft Cassini 47 Oort Cloud 47 GRB #B 47 onboard Chandrayaan 47 spaceborne 47 Anisotropy Probe WMAP 47 astronomer 47 Flyby 47 orbiting observatory 47 gradiometer 47 ultraviolet spectrograph 47 celestial objects 47 penetrating radar 47 Comet McNaught 46 Lunar Exploration 46 UVIS instrument 46 icy moons 46 OGLE TR #b 46 Explorer IBEX 46 panchromatic 46 skywatching 46 Mössbauer spectrometer 46 Space Infrared Telescope 46 DigitalGlobe 46 Comet Encke 46 Cassini Ion 46 EarthCARE 46 Quadrantids 46 hyperspectral imager 46 Mars Squyres 46 infrared observatory 46 NanoSIMS 46 multispectral imager 46 infrared satellite imagery 46 spiral galaxy NGC 46 gravitational microlensing 46 Giovanni Cassini 46 DigitalGlobe constellation 46 substorm 46 asteroids 46 Chajnantor 46 Saturn moons 46 Hubble Near Infrared 46 Conductivity Analyzer 46 Applied Physics Laboratory 46 spectral bands 46 NEXRAD radar 46 ESA Huygens 46 Advanced Spaceborne Thermal Emission 46 optical wavelengths 46 Thiemens 46 EarthScope 46 ExoMars rover 46 Observatoire de Paris 46 Chandra X ray 46 RQ# 46 Solar Observatory 46 robotic rovers 46 NASA Fermi Gamma 46 georeferenced 46 QuikSCAT 46 LCROSS spacecraft 46 Optical Spectroscopic 46 interplanetary spacecraft 46 Southern Observatory ESO 46 diffraction patterns 46 Mars Pathfinder lander 46 NRAO 46 National Optical Astronomy 46 Credits ESA 46 sunspot 46 orbital solitude 46 Bethany Ehlmann 46 transiting planets 46 Abdalati 46 KamLAND 46 ESA GOCE 46 Shepherding Spacecraft 46 Fuk Li Mars 46 Sojourner rover 46 WMAP 46 NCAR 46 Fermi LAT 46 Louis Stodieck 46 PlanetQuest 46 SIM PlanetQuest 46 Schwehm 46 Kitt Peak National 46 Pascale Ehrenfreund 46 Thierry Legault 46 HIRES spectrometer 46 Victoria Crater 46 Cassini flybys 46 photosphere 46 Lunar CRater Observation 46 Jean Pierre Lebreton Huygens 46 mesosphere 46 photometry 46 crustal thickness 46 Martian dust 46 Nili Fossae 46 NASA Lunar Crater 46 JCMT 46 VLTI 46 unmanned probes 46 interferometer 46 astronomical observations 46 Shackleton crater 46 Landsat images 46 highly elliptical orbits 46 NuSTAR 46 hydrated minerals 46 Chandra Observatory 46 Suzaku X ray 46 aerobraking 46 SIRAL 46 MODIS instrument 46 lunar orbits 46 fluorescence microscope 46 Herschel Planck 46 Cassini Huygens mission 46 multiwavelength 46 Landsat imagery 46 Nasser Peyghambarian 46 submillimeter 46 planets asteroids 46 visible wavelengths 46 Orion Nebula 46 magnifications 46 Ocean Salinity 46 comet dust 46 Ball Aerospace 46 ESA CryoSat 46 hexagonal mirrors 46 Kuiper Belt Object 46 Hyperspectral 46 Siding Spring 46 asteroid 46 Ranging spacecraft 46 Huchra 46 Dan Werthimer 46 Spectroradiometer MODIS 46 CIRS 46 SDSS 46 Doppler velocity 46 interferometric observations 46 regolith 46 Toutatis 46 Director Charles Elachi 46 distant galaxy 46 ultraviolet wavelengths 46 Space Telescope Science 46 celestial sphere 46 comet McNaught 46 Infrared Atmospheric 46 Large Binocular Telescope LBT 46 fissure eruption 46 remotely sensed 46 Aram Chaos 46 Epoxi 46 Jay Melosh 46 ADM Aeolus 46 polar orbiting satellites 46 Envisat Medium Resolution 46 ROCSAT 2 46 Junichiro Kawaguchi 46 lander Philae 46 exosphere 46 confocal microscope 46 atmospheric oceanic 46 orbiter Mars Odyssey 46 XMM Newton X ray 46 lunar crust 46 pointings 46 Palomar Observatory 46 aurora 46 imager 46 NASA MESSENGER spacecraft 46 SWIFT J#.# 46 Galilean satellites 46 Moon Mineralogy Mapper M3 46 MOLA 46 lidar 46 robotic lander 46 Digital Elevation Models 46 CHARA 46 Earthlike planets 46 NASA twin STEREO 46 BepiColombo 46 APEX telescope 46 SORCE 46 KIPAC 46 Lunar Surface 46 observational astronomy 46 Mars Descent Imager 46 Cathy Peddie LRO 46 Rover MER 46 Infrared Processing 46 GeoEye 46 Rich Zurek 46 Express orbiter 46 ultraviolet spectrometer 46 SN #A 45 ESO telescope 45 orbiting Chandra 45 RPWS 45 Neutron Spectrometer 45 cosmic ray 45 HD #b [002] 45 radar interferometry 45 flybys 45 Stadermann 45 SSETI Express 45 landforms 45 moon permanently shadowed 45 D CIXS 45 X ray spectrometer 45 MErcury Surface Space ENvironment 45 Cygnus Lyra region 45 X ray observatories 45 interferometric synthetic aperture radar 45 Cassini Equinox 45 Dean Pesnell 45 cometary dust 45 NASA Stardust NExT 45 Space Agency 45 Cryospheric Sciences Branch 45 Alpha Particle 45 SINFONI 45 Arecibo radar 45 stellar occultations 45 filamentary structure 45 Observatory STEREO 45 ESA ASI 45 Deep Impact mission 45 Astronomy 45 comet Churyumov Gerasimenko 45 Interferometer VLTI