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(Click for frequent words.) 77 decadal survey 66 JDEM 62 Cosmic Vision 62 decadal surveys 62 MEPAG 60 NuSTAR 60 Solar Orbiter 59 EPOCh 59 ESMD 58 Kepler Mission 58 Astrophysical 58 Space Interferometry Mission 57 SMEX 57 NASA THEMIS 57 Heliophysics 57 JIMO 57 JPDO 57 NASA Astrobiology 57 Jupiter Icy Moons Orbiter 57 OSIRIS REx 57 Landsat satellite 57 NASA 56 planetary missions 56 ExoMars mission 56 NASA Cosmic Background 56 journal Meteoritics 56 NASAs 56 BepiColombo 56 Lunar Exploration 56 Spaceguard 56 GLAST telescope 55 NASA Exobiology 55 Solar Radiation 55 Technology Policy OSTP 55 Decadal 55 Pluto Charon 55 NASA Stratospheric Observatory 55 journal Acta Astronautica 55 Astrobiology Institute 55 Math Advisory Panel 55 JIMO mission 55 Christopher Chyba 55 linear collider 55 NASA WMAP 54 GEOSS 54 SciDAC 54 Quadrennial Defense Review QDR 54 Admiral Gehman 54 LDCM 54 ESSP 54 heliophysics 54 SIM PlanetQuest 54 Pan STARRS 54 ChemCam 54 Cosmic Background Explorer 54 Antenna LISA 54 QHSR 54 GOSAT 54 binary asteroid 54 Simonetta Di Pippo ESA 54 planetary Transits 54 NAOMS 54 EPOXI mission 54 exobiology 54 Lunar Prospector 54 Subsonic Rotary Wing 54 Carl Marchetto 54 Interior Laboratory GRAIL 53 Planck satellite 53 astrobiological 53 CAIB recommendations 53 Jupiter Icy Moons 53 National Academies 53 Mission Directorate 53 gamma ray observatory 53 ESAS 53 Pluto Kuiper Belt 53 astrometric 53 PEIS 53 YORP effect 53 NASA Authorization 53 Terrestrial Planet Finder 53 Pentagon Quadrennial Defense 53 Aeronautics NACA 53 Solar TErrestrial RElations Observatory 53 National Nanotechnology Initiative 53 infrared astronomy 53 Chandrayaan II 53 Europa Orbiter 53 NSBRI 53 Robotic Lunar Exploration 53 polar mesospheric clouds 52 Volatile Evolution 52 planetary science 52 Keck Interferometer 52 Metabolic Engineering 52 Sasselov 52 Robert Jedicke 52 ESFRI 52 NSABB 52 Outer Planets 52 DOE NNSA 52 OSIRIS Rex 52 Landsat Data 52 manned lunar missions 52 SDSS II 52 Cassini Equinox 52 unsustainable trajectory 52 Convection Rotation 52 LADEE 52 Mars Climate Sounder 52 COROT 52 gravitational lenses 52 Krimigis 52 crustal thickness 52 ESA Planck 52 NITRD 52 detect gravitational waves 52 NLSI 52 Laboratory MSL 52 NGATS 52 NASA LaRC 52 Commercial Reusable Suborbital 52 Orbiter LRO 52 Einstein relativity theory 52 Fran Bagenal 52 CReSIS 52 Terrestrial Planet Finder TPF 52 Mercury flyby 52 EarthCARE 52 Spaceguard Survey 52 ESA Integral 52 Fundamental Aeronautics Program 51 Fermi Telescope 51 Fundamental Physics 51 Cynthia Rosenzweig 51 JWST 51 I3P 51 Helioseismic 51 THEMIS satellites 51 SCISAT 51 Aeronautics Subcommittee 51 NASA MESSENGER 51 GALEX 51 geoid 51 Mars Orbiter 51 LIPID MAPS 51 Earth Observation System 51 Great Observatories 51 NASA Landsat 51 SSP FRR 51 radio occultation 51 Deep Impact mission 51 orbiting observatories 51 Orbital Debris 51 planetary exploration 51 LaRC 51 SPICAM 51 Research Institute NSBRI 51 COSPAR 51 cosmological parameters 51 Exobiology 51 neutron spectrometer 51 Mathematics Advisory Panel 51 PCAST 51 ESA Cluster 51 Orbiting Carbon Observatory OCO 51 Cassini Huygens 51 Human Epigenome Project 51 cosmological observations 51 SBSP 51 ADM Aeolus 51 Borexino 51 Christopher Scolese 51 Hubble Space Telescope HST 51 Yinghuo 1 51 Laser Interferometer Space 51 Thermal Emission Spectrometer 51 VASIMR 51 asteroid deflection 51 Expendable Launch Vehicle 51 exoplanetary 51 manned lunar 51 Hubble Servicing 51 Cloud Aerosol Lidar 51 Ulysses spacecraft 51 Astrobiology 51 O OREOS 51 LISA Pathfinder 51 Mishap Investigation Board 51 Control Segment OCX 51 MicroFUN 50 ESA SMART 50 AMASE 50 Solar Dynamics Observatory 50 GOCE 50 Cosmological 50 Mars CRISM 50 Ionosphere Center 50 Abrupt Climate Change 50 mineralogical composition 50 Space Physics 50 Foing 50 STEREO spacecraft 50 PRCB 50 CxP 50 Moon Mineralogy Mapper M3 50 IOOS 50 LASP 50 ARCTUS 50 laser altimeter 50 NASA GSFC 50 astrophysical phenomena 50 Lennard Fisk 50 Huygens mission 50 Protein Structure Initiative 50 UKIRT 50 Abdalati 50 Tod Strohmayer 50 geospace science 50 Anisotropy Probe WMAP 50 RNEP 50 filamentary structure 50 galaxy formation 50 UCO Lick 50 ASPERA 50 America COMPETES Act 50 International Geosphere Biosphere 50 QuikSCAT 50 Planck telescope 50 VIRTIS 50 multiwavelength 50 spokesman Michael Braukus 50 Planetary Protection 50 Lunar Orbiter Laser Altimeter 50 Infrared Pathfinder Satellite 50 JPSS 50 GJ #b [001] 50 ICESat 50 ENCODE 50 NAVSTAR Global Positioning System 50 ExoMars rover 50 WFC3 50 Stockpile Stewardship 50 MIRTHE 50 DEPTHX 50 windshield wiper maneuver 50 Norm Augustine 50 Ocean Observatories Initiative 50 NSF TeraGrid 50 Crew Launch Vehicle 50 Fermi telescope 50 Cosmic Microwave Background 50 Magnetospheric 50 Saturnian moon Titan 50 EarthScope 50 Vehicles Directorate 50 neutrino physics 50 Subsonic Fixed Wing 50 unmanned probes 50 ESA ASI 50 NASA Kepler 50 Astronomical Society AAS 50 WMAP satellite 50 NASA Exobiology Program 50 Richard Mushotzky 50 NASA Goddard 50 Mike Leinbach shuttle 50 Richard Binzel 50 Lunar Reconnaissance Orbiter LRO 50 galaxy redshift 50 Hubble orbits 50 IceBridge 50 Explorer IBEX 50 SDSS III 50 Mid Infrared 50 Explorer WISE 50 Infrared Astronomy SOFIA 50 AERONET 50 Quadrennial Defense Review 50 MAVEN 50 Hipparcos 50 Horizon Scanning 50 Board CAIB 50 DIXI 50 WISE spacecraft 50 Planck observatory 50 trans Neptunian objects 50 synthetic genomics 50 interplanetary missions 50 Mars Atmosphere 50 ESLC 49 Earthscope 49 SMOS Soil Moisture 49 galactic cosmic rays 49 cryosphere 49 orbital rendezvous 49 Phobos Grunt 49 COSMO SkyMed 49 Energy Innovation Hubs 49 Magnetic Imager 49 NAPCC 49 NASA Solar Terrestrial 49 habitable worlds 49 astrophysical 49 Winglee 49 Climate Experiment GRACE 49 moon permanently shadowed 49 Polar orbiting Operational 49 Extragalactic 49 C NOFS 49 particle astrophysics 49 Systems Mission Directorate 49 Flyby spacecraft 49 Bruce Jakosky 49 Torino Scale 49 NASA Wilkinson Microwave 49 RQ# 49 Biomacromolecules 49 Roddam Narasimha 49 E ELT 49 HIAPER 49 optical interferometry 49 COMSTE 49 NASA ICESat 49 NASA Planetary 49 OSTP 49 Situ Resource 49 satellites orbiting Earth 49 infrared observatory 49 ENVISAT 49 Physics Applied Physics 49 neutrino oscillation 49 Quadrennial Defence 49 scientist Bernard Foing 49 polarimetric 49 Space Administration CNSA 49 lunar landers 49 NASA STEREO 49 ESA Herschel 49 Alycia Weinberger 49 spokesman Grey Hautaluoma 49 LCROSS Observation Campaign 49 Medspiration 49 LCROSS mission 49 John Grotzinger 49 Spudis 49 DISR 49 manned lunar landing 49 Philae lander 49 Deep Impact Extended 49 Galileo spacecraft 49 CoML 49 asteroid impacts 49 EPSCoR 49 JHU APL 49 Environmental Satellite POES 49 Heterodyne Instrument 49 Orion Ares 49 NOAO 49 Space Posture Review 49 NASA Kepler telescope 49 Taylor Dinerman 49 gamma ray detector 49 ARPES 49 Anisotropy Probe 49 CloudSat 49 PlanetQuest 49 Jay Melosh 49 SMOS mission 49 GRAIL 49 airglow 49 Maria Zuber 49 Recombinant DNA 49 MetOp satellite 49 NEOSSat 49 Pascale Ehrenfreund 49 GRB #B 49 IceCube 49 AIRSS 49 Lunar Orbiter 49 WebTAS 49 Jeffrey Kargel 49 twin STEREO spacecraft 49 ATST 49 NFIRE 49 Mars Pathfinder 49 Sirangelo 48 TSIS 48 astrophysics 48 Hubble servicing 48 spectroscopic observations 48 UAVSAR 48 Luan Enjie 48 David Southwood ESA 48 Ranging MESSENGER spacecraft 48 Mr Busquin 48 BaBar experiment 48 Magnetic Imager HMI 48 journal Astrobiology 48 Ångström 48 colliding asteroids 48 Quadrennial Homeland Security 48 Earthquake Prediction 48 particle physics experiments 48 mineralogical mapping 48 ray Space Telescope 48 Institute SwRI 48 Nasa 48 D CIXS 48 Cosmic Evolution 48 Meteoritics 48 noctilucent clouds 48 ESA Rosetta 48 NASA Lunar Prospector 48 NASA LCROSS 48 decadal 48 IBEX spacecraft 48 lunar exploration 48 Hakan Svedhem 48 BMC2 48 orbital insertion 48 Relations Observatory STEREO 48 RLEP 48 NIH Roadmap 48 Relativity Theory 48 Earth Observation Satellites 48 Foton M2 48 NEAs 48 dexterous robot 48 Cryosat 48 Planetary Science 48 Shuttle Radar Topography 48 SMOS 48 APXS 48 Orbiter MRO 48 Eric Becklin 48 WGIG 48 DUSEL 48 orbiting gamma ray 48 System IOOS 48 Martian rovers 48 interplanetary spacecraft 48 Biological Effects 48 CNES 48 Ionizing Radiation 48 Melosh 48 auroral emissions 48 KamLAND 48 Ocean Salinity 48 ISDC 48 NASA Interstellar Boundary 48 CDMS II 48 WISE telescope 48 High Resolution Imaging 48 Educator Astronaut 48 Observatory SDO 48 Interplanetary Internet 48 Landsat satellites 48 Nature Structural Biology 48 Metop 48 geoengineering schemes 48 Huygens descent 48 Sheila Widnall 48 Cryospheric Sciences Branch 48 SAFOD 48 Infrastructure Network NNIN 48 Churyumov Gerasimenko 48 astrophysical objects 48 astronomical observatories 48 CBAT 48 atmospheric aerosols 48 Heliospheric 48 GJ#b 48 Aquarius SAC 48 Hydrospheric 48 Tertiary Education Strategy 48 Gravity Probe B 48 NPOESS 48 Draft Scoping 48 IAU definition 48 Program CCSP 48 International Linear Collider 48 Large Synoptic Survey 48 supercomputer simulations 48 Reliable Replacement Warhead 48 Stardust NExT mission 48 Review FRR 48 orbiter lander 48 lunar missions 48 airborne particles affect 48 Orion MPCV 48 Infrared Astronomy 48 KIPAC 48 NASA Lunar Crater 48 experimental payloads 48 E8 calculation 48 Operationally Responsive Space 48 NASA twin STEREO 48 Martian rover 48 situ measurements 48 largest moon Charon 48 Global Differential GPS 48 Volker Liebig 48 SIRTF 48 inertial confinement fusion 48 Astroparticle Physics 48 Kuiper belt objects 48 Squyres Cornell 48 Planetary Fourier Spectrometer PFS 48 Exoplanets 48 AMSR E 48 Aeronomy 48 microshutters 48 Space Station Status 48 neutrino oscillations 48 LDRD 48 deorbiting 48 Lunar Reconnaissance Orbiter Camera 48 enters lunar orbit 48 Spectroradiometer 48 Owen Gingerich 48 Solar Terrestrial Physics 48 Helios 2B 48 Nasa Goddard Space 48 Syun Ichi Akasofu 48 Interstellar Boundary Explorer 48 Yarkovsky effect 48 planetary explorations 48 Neutron Detector 48 Mini SAR 48 planets atmospheres 48 Institute NSBRI 48 Dean Pesnell 48 GCEP 48 Fermi Gamma ray 48 Advanced Concepts NIAC 48 Megha Tropiques 48 EPOXI 48 Gael Chauvin 47 RHESSI 47 Higgs singlet 47 microlensing events 47 Cassini Imaging 47 extrasolar planetary systems 47 Fermi LAT 47 YES2 47 Atlantis Undocks From 47 dynamical evolution 47 Huygens Probe 47 Strategic Redeployment 47 ESRIN 47 Sushil Atreya 47 Launch Abort System 47 subsurface ocean 47 spectroscopic measurements 47 P/# A2 47 Nasa Ames 47 reionization 47 NASA Administrator 47 NASA Great Observatories 47 AFOSR 47 COET 47 STScI 47 Total Ozone Mapping 47 Cassini Huygens spacecraft 47 particle acceleration 47 GPS IIR M 47 NSTIC 47 Pakrasi 47 X ray observatory 47 SFAz 47 Orbiter spacecraft 47 martian meteorites 47 Pew Oceans Commission 47 Jean Luc Margot 47 Human Spaceflight 47 lunar topography 47 Bioengineering NIBIB 47 UT ORNL 47 NSGIC 47 Surface Temperature 47 NSDI 47 NSSTC 47 Lebacqz 47 NASA Educator Astronaut 47 IHST 47 Ocean Observing 47 Planetary Geology 47 EIAST 47 Readdy 47 CBERS 2B 47 FalconSat 2 47 programmatic 47 Gravity Probe 47 journal Monthly Notices 47 Spatiales CNES 47 Program Prioritization 47 Astro E2 47 ESA Envisat satellite 47 Raymond Jeanloz 47 Laser Interferometer Gravitational Wave 47 Jonathan Lunine 47 Viking Lander 47 Wilkinson Microwave Anisotropy Probe 47 manned orbital 47 Ellen Stofan 47 greatest insect emergences 47 Exceptional Achievement Medal 47 Stratospheric Observatory 47 LRO spacecraft 47 icy moons 47 Herschel Space Telescope 47 Milankovitch cycles 47 Stafford Covey 47 Hubble Telescope 47 scatterometer 47 Infrared Array Camera 47 NAVSTAR GPS 47 ESA CryoSat 47 IPCC AR4 47 AMDR 47 Nasa Goddard Institute 47 Kei Koizumi 47 extrasolar planet observations 47 outer planets 47 manager Gerhard Schwehm 47 MARSIS 47 stratospheric airship 47 Forschungszentrum Dresden Rossendorf FZD 47 Response Framework 47 Apophis asteroid 47 radar altimetry 47 Continuity Mission LDCM 47 Cosmic Background Explorer COBE 47 SEGUE 47 astroparticle physics 47 IPCC Intergovernmental Panel 47 Buesseler 47 Cassini Huygens Mission 47 Operations Bill Gerstenmaier 47 KICs 47 GLBRC 47 astrometry 47 NRSA 47 Andrea Ghez 47 NASA astrobiology 47 NIST 47 Security GMES 47 Lawrence Krauss 47 cosmic ray flux 47 ESA 47 meteoroid 47 inhabitable planets 47 insect cyborgs 47 Yannick d' Escatha 47 STEREO mission 47 Cyberspace Policy 47 STSS Demo 47 Telescope LSST 47 Martian arctic 47 NCEP 47 Robert Mirelson 47 William Readdy NASA 47 scientist Drew Shindell 47 interinstitutional 47 Space Infrared Telescope 47 Venusian surface 47 Exoplanet 47 Rosetta spacecraft 47 Mastcam 47 ESO telescopes 47 correlative microscopy 47 Earth Observing 47 Descent Imager Spectral Radiometer 47 Institute STScI 47 particle colliders 47 Waleed Abdalati 47 Reliable Replacement Warhead RRW 47 Global Precipitation Measurement 47 Kepler spacecraft 47 Planetary Transits 47 IPY 47 Pierre Simon Laplace 47 Galaxy Evolution 47 Moon Mineralogy Mapper 47 Son Nghiem 47 Exascale 47 MARSIS radar 47 solar corona 47 Near Infrared Camera 47 observational cosmology 47 Instrument Module 47 planetary scientist 47 Mars Phobos 47 Douglas Osheroff 47 Earth Observations 47 Panoramic Camera 47 lunar explorer 47 Mission TRMM 47 Grillmair 47 spaceborne 47 UC CEIN 47 tumbleweed rover 47 Context Camera 47 JAXA 47 ExoMars Trace Gas 47 ICESCAPE 47 Dalcanton 47 gamma ray observatories 47 HiRISE 47 EDRN 47 Drake Deming 47 Human Microbiome Project 47 IMoSEB 47 supersymmetric particles 47 Galilean satellites 47 DEISA 47 UCDMO 47 geodynamics 47 COMPETES Act 47 Mössbauer spectrometer 47 Dan Durda 47 geosynchronous 47 COBE 47 Pleiades supercomputer 47 System BMDS 47 Stockpile Stewardship Program 47 Lunar Reconnaissance 47 SunShot Initiative 47 J# +# [002] 47 Gaele Winters 47 JTIs 47 Commission SUPARCO 47 Envisat satellites 47 Robotic Exploration 47 extragalactic 47 Ralph Cicerone 47 Jet Propulsion Laboratory JPL 47 Acquisition Advisory Panel 47 Delta Cephei 47 relativity theory 47 NIBIB 46 Gamma ray Large 46 FIPSE 46 Imaging Spectrometer 46 homochirality 46 Vehicle CEV 46 BN Suresh 46 GMES 46 scramjet engines 46 Mark N. Sirangelo 46 Productive Nanosystems 46 Project Agency DARPA 46 Explorers ASE 46 CYBERCOM 46 Plan NIPP 46 Crew Exploration 46 Ionospheric 46 Compact Reconnaissance Imaging Spectrometer 46 Joel Primack 46 rover Spirit 46 SESAR 46 journal Icarus 46 Suborbital 46 Saturn Cassini 46 Vakoch 46 Simonetta Di Pippo 46 nEUROn 46 NASA Stardust NExT 46 Field Infrared Survey 46 SINFONI 46 stockpile stewardship 46 Mussel Watch 46 Mars orbiting spacecraft 46 Earthquake Hazards Reduction 46 NASA Microgravity 46 GeoForschungsZentrum Potsdam 46 quantum gravity 46 Manned Spaceflight 46 nonregulatory 46 GRAIL mission 46 gradiometer 46 Webb Telescope 46 ICRP 46 visit http:/saturn.jpl.nasa.gov 46 outyear 46 ESnet4 46 polar orbiting 46 Tumor Sequencing Project 46 planet Gliese #g 46 Nikku Madhusudhan 46 Erik Asphaug 46 Reusable Launch Vehicle 46 human spaceflight 46 DubaiSat 1 46 manganite 46 multi decadal 46 ExoMars 46 Glikson 46 Foundation ESF 46 HRSC 46 X ray telescopes 46 Global Precipitation Climatology 46 Climate Change Mitigation 46 telescopic observations 46 National Guideline Clearinghouse 46 Rosetta lander 46 Alliance MDAA www.missiledefenseadvocacy.org 46 Orbit Validation 46 NASA Far Ultraviolet 46 GLAST 46 document A/#/#/Add.# 46 Dordain 46 AMPERE 46 BEIR VII 46 INCCA 46 superclusters 46 Russell Schweickart 46 Human Proteome Organization 46 Review QDR 46 Svedhem 46 Kuiper Belt object 46 Astronaut Julie Payette 46 Richard Vondrak 46 retrograde orbit 46 Space Fence 46 NROL 46 Origins Spectral Interpretation 46 Roadmapping 46 CAIB 46 Research Initiative MURI 46 Tsunami Hazard Mitigation 46 electroweak 46 Critical Path Initiative 46 Engineering COMSTE 46 Enceladus flybys 46 Jakosky 46 Simonetta Di Pipo 46 Petascale Computing 46 Anyamba 46 photometry 46 Mars Reconnaissance Orbiter MRO 46 Geochimica et Cosmochimica Acta 46 Prasad Gogineni 46 comets asteroids 46 neutrino experiment 46 Astrophysical Research 46 Barry Barish 46 Robin Canup 46 NASA EPOXI mission 46 Earth objects NEOs 46 Studies CNES 46 Charles Bailyn 46 SeaWiFS 46 radial velocity 46 Research Infrastructures ESFRI 46 Innovative Partnerships Program 46 planetary geology 46 Peaceful Uses 46 Nima Arkani Hamed 46 BBSNews #-#-# NASA 46 Extrasolar Planet Observation 46 Einstein equations 46 Research Flagships 46 Constellation Observing 46 Henrik Svensmark 46 Climate Modeling 46 Gerard Kuiper 46 Adaptive optics 46 Spacewatch 46 Programmatic Environmental Impact Statement 46 Kounaves 46 Rover MER 46 William Happer 46 Milankovitch 46 Deep Impact comet 46 Systems GEOSS 46 Rosetta comet chaser 46 Cargo Launch Vehicle 46 scientist Anthony Colaprete 46 Science Experiment HiRISE 46 HiRISE camera 46 Beyond Grey Pinstripes 46 Rayleigh scattering 46 VIIRS 46 MINOS 46 IEEE P#.#ba 46 gravitational microlensing 46 Jay Zwally 46 Wideband Gapfiller Satellite 46 roadmapping 46 Geosynchronous 46 SEGIS 46 Herschel telescope 46 Exploring Planets 46 Lester Lyles 46 ELSI 46 GOCE satellite 46 Mission Directorates 46 THEMIS 46 quantum chromodynamics 46 7th Framework Programme 46 CALIPSO 46 CoRoT satellite 46 Earth orbiting satellites 46 Climate Sounder 46 Mössbauer 46 Multiscale Modeling 46 Hubble telescope 46 Earthlike planets 46 QQ# 46 Rusty Schweickart 46 Rosetta orbiter 46 NEOWISE 46 Satellite System NPOESS 46 NSIDC 46 INPRO 46 Cygnus Lyra region 46 asteroid collisions 46 ICESS 46 Atmospheric Oceanic 46 Mission SRTM 46 Robert Socolow 46 probe Chang'e 46 National Polar Orbiting 46 CryoSat mission 46 Chandrayan 46 Initiative GRI 46 Cancri e 46 bedrock outcropping 46 Advanced Functional Materials 46 CUDOS 46 powder diffraction 46 NSF Integrative Graduate 46 SDSS telescope 46 Planck spacecraft 46 cosmic particles 46 Geoengineering 46 Astrosat 46 International HapMap Consortium 46 Green# list 46 Climate Impact Assessment 46 HI MEMS 46 National d' Etudes 46 stratospheric ozone depletion 46 asteroids comets 46 Joint Warfighting 46 electron diffraction 46 Lunar Laser Ranging 46 COPUOS 46 hypervelocity 46 SUSY 46 moons circling 46 Corot 7b 46 BepiColombo mission 46 Romero Lankao 46 MITEI 46 IPBES 46 STSS Demonstration 46 Submillimeter Array 46 STORRM 46 STIS 46 Uninhabited Aerial Vehicle 46 metocean 46 Ares Orion 46 TerraSpark 46 Lunar Surface 46 rover Spirit landed 46 Preparedness Goal 46 Mars Color Imager 46 OGLE TR #b 46 ultrashort pulses 46 Avishay Gal Yam 45 Bette Otto Bliesner 45 NSLS 45 MPCV 45 COROT 7b 45 Altair lunar lander 45 Natural Hazards 45 Upper Atmosphere 45 Manned Space 45 lunar surface 45 Ouyang Ziyuan 45 Imaging Spectroradiometer MODIS instrument 45 ITEA 45 NCAR 45 Earth magnetosphere 45 journal Nature Photonics 45 HiRISE image 45 Joint Expeditionary Force 45 VHESC 45 noctilucent 45 gravitational radiation 45 QuikScat 45 Technology JAMSTEC 45 Ozone Monitoring 45 Space Telescope GLAST 45 MoonLITE