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(Click for frequent words.) 61 Planck satellite 59 XMM Newton 58 Planck telescope 58 WMAP 58 COROT 57 XMM Newton satellite 57 SIRTF 57 ESA Herschel 56 LORRI 56 Cassini 56 Kepler 55 solar corona 55 distant galaxies 55 Cassini Huygens 54 Hubble observations 54 VIRTIS 54 Cosmic Microwave Background 54 THEMIS 54 Mössbauer 54 Huygens 54 Earthlike planets 54 spectroscopic 54 cosmic microwave background 53 JDEM 53 infrared astronomy 53 JWST 53 extragalactic 53 X ray telescopes 53 RXTE 53 Planck spacecraft 53 filamentary structure 53 MARSIS 53 AKARI 53 ESA Integral 53 Cosmic Microwave Background CMB 53 LCROSS 53 SPIRE instrument 53 IceCube 53 ESA Cluster 53 astrophysical 53 WMAP satellite 52 RHESSI 52 GALEX 52 LOFAR 52 Lunar Reconnaissance Orbiter LRO 52 Chodas 52 ESO VLT 52 NuSTAR 52 comet nucleus 52 Stadermann 52 NASA Wilkinson Microwave 52 ESA Planck 52 Herschel telescope 52 OGLE TR #b 52 COBE 52 ESA XMM Newton 52 radial velocity 52 cometary 52 submillimeter wavelengths 52 GLAST 52 Solar Orbiter 52 Cosmic Background Explorer 51 GOCE 51 Churyumov Gerasimenko 51 astrometry 51 Ulysses spacecraft 51 APXS 51 exoplanet 51 MINOS 51 photometry 51 Great Observatories 51 supersymmetric particles 51 attosecond 51 planetary Transits 51 Wilkinson Microwave Anisotropy Probe 51 exoplanetary 51 Galileo spacecraft 51 galaxy clusters 51 infrared wavelengths 51 lunar surface 51 interferometry 51 Kepler Mission 51 LIGO 51 GRBs 51 LRO 51 Herschel Space Telescope 51 THEMIS satellites 51 ESA SMART 51 Heterodyne Instrument 51 luminous galaxies 51 STEREO spacecraft 50 astronomers 50 gamma ray bursts 50 AB Aurigae 50 SDSS II 50 submillimeter 50 brown dwarfs 50 Rosetta spacecraft 50 Cosmic Evolution 50 ROSAT 50 X ray observatory 50 millisecond pulsar 50 Composite Infrared Spectrometer 50 detect gravitational waves 50 Hubble 50 cosmic ray 50 BepiColombo 50 galaxies 50 Foing 50 Diviner 50 NASA Goddard 50 Kuchner 50 astronomical objects 50 HiRISE 50 Astrophysical 50 LCLS 50 gamma ray spectrometer 50 asteroid Vesta 50 Gravitational lensing 50 AGNs 50 spatially resolved 50 NASA Cassini 50 X ray wavelengths 50 WFPC2 50 Space Telescope 50 Giovanni Cassini 50 exoplanets 50 Climate Experiment GRACE 50 Orbiter LRO 50 planets 50 Solar System 49 Dalcanton 49 Spudis 49 radio occultation 49 NASA Cosmic Background 49 Schawinski 49 Fomalhaut b 49 asteroid Eros 49 Huygens mission 49 KBOs 49 cosmic microwave radiation 49 Sasselov 49 Convection Rotation 49 Saturn Cassini 49 axion 49 Proba 2 49 stellar occultations 49 cosmological distances 49 Anisotropy Probe 49 Planetary Transits 49 Higgs bosons 49 UVOT 49 extrasolar 49 Saturn rings 49 HRSC 49 Hipparcos 49 reionization 49 Observatoire de Paris 49 Solar TErrestrial RElations Observatory 49 spectrometer 49 NASA Cassini spacecraft 49 MESSENGER 49 Gehrels 49 gravitational waves 49 gravitational wave 49 extrasolar planets 49 NASA STEREO 49 Herschel Space 49 photometer 49 Spitzer Space Telescope 49 Higgs particle 49 NICMOS 49 swingby 49 distant quasars 49 Krimigis 49 Diviner instrument 49 Halzen 48 outer planets 48 Kazantzidis 48 SNfactory 48 gamma ray observatory 48 ecliptic plane 48 fainter objects 48 MARSIS radar 48 Hubble Space Telescope HST 48 Hubble Constant 48 CMB radiation 48 Cosmologists 48 redshift 48 Hubble Space Telescope 48 spectroscopy 48 spectroscopic observations 48 infrared spectrograph 48 Anisotropy Probe WMAP 48 Geminga 48 HUDF 48 neutrino 48 icy moons 48 extrasolar planet 48 Orbiter MRO 48 supernovae 48 Spectrograph 48 composite infrared spectrometer 48 DISR 48 Comet Hartley 2 48 VLBA 48 RRATs 48 millimeter wavelengths 48 Lunar Prospector 48 Gerard Kuiper 48 comet McNaught 48 EPOXI 48 interferometers 48 SDSS 48 Corot 7b 48 X ray spectrometer 48 imaging spectrometer 48 celestial object 48 ESA Rosetta 48 cosmological observations 48 Io Europa 48 Solar Terrestrial Relations 48 Rosetta orbiter 48 rocky extrasolar planet 48 HD#b 48 ARPES 48 Explorer WISE 48 X ray emission 48 neutron stars 48 VLTI 48 Cosmic Background Explorer COBE 48 spectroscopic analysis 48 submillimetre wavelengths 48 asteroid Steins 48 millisecond pulsars 48 STIS 48 STEREO 48 IBEX spacecraft 48 Mini SAR 48 WFC3 48 TanDEM X 48 infrared observatory 48 cosmologists 48 Epsilon Aurigae 48 NASA THEMIS 48 redshifts 48 neutron spectrometer 48 Zarnecki 48 Herschel 48 infrared telescopes 47 SMOS 47 comets orbiting 47 redshifted 47 Kuiper Belt Objects 47 Gehrz 47 OSIRIS 47 P/# A2 47 de Pater 47 Caltech astronomer 47 laser altimeter 47 Area Telescope LAT 47 electron ion 47 polarimetry 47 Pluto Charon 47 ChemCam 47 sunlike star 47 Multi Object Spectrometer 47 infrared wavelength 47 cosmos 47 Kailash Sahu 47 Dupke 47 astrophysical phenomena 47 quasars 47 lensing galaxy 47 CRISM 47 NASA MESSENGER 47 planemos 47 gravitational lensing 47 CoRoT satellite 47 Relations Observatory STEREO 47 SIM PlanetQuest 47 optical telescopes 47 LASP 47 Wolszczan 47 solar nebula 47 Microlensing 47 planetary nebulae 47 GRB #B 47 X ray Observatory 47 Mars landers 47 spectroscopic measurements 47 TrES 47 intrinsic brightness 47 WASP #b 47 extrasolar planetary systems 47 Collider Detector 47 astronomical observations 47 Telescope 47 Stéphane Udry 47 gamma ray burst 47 Webb Telescope 47 comet 47 Evolution Explorer 47 quasar 47 Phobos 47 gaseous planet 47 nightside 47 BaBar 47 interstellar dust 47 Viking landers 47 Adam Riess 47 CoRoT 47 Deep Impact eXtended Investigation 47 SUSY 47 astronomical telescope 47 Galaxy Evolution 47 occultations 47 Stassun 47 cosmic rays 47 C1XS 47 Saturn magnetosphere 47 infrared spectra 47 Laser Interferometer Space 47 moons Phobos 47 Gutoski 47 Comet Hartley 47 NanoSIMS 47 Alfvén waves 47 gravitational lenses 47 GJ #b [001] 47 TerraSAR X 47 A'Hearn 47 Proxima Centauri 47 Near Infrared Camera 47 Voyager spacecraft 47 multiwavelength 47 NASA Fermi Gamma 47 astrometric 47 coronagraph 47 telescope 47 astrophysicists 47 Type Ia supernovae 47 magnetospheric 47 neutron star 47 radial velocity technique 47 Neukum 47 bolometers 47 exo planets 47 ESA Mars 47 ultraviolet wavelengths 47 gravitational radiation 47 Cassini ultraviolet 47 DZero 47 celestial sphere 47 permanently shadowed craters 47 planetesimals 47 HESS 47 GJ#b 47 Fermi LAT 47 electron neutrinos 47 Southern Observatory ESO 47 Descent Imager Spectral Radiometer 47 OSTM Jason 2 47 accretion disks 46 Mars Reconnaissance Orbiter MRO 46 galactic cosmic rays 46 NEOWISE 46 NASA Kepler 46 Comet Machholz 46 pulsar 46 circular orbit 46 eclipsing binary 46 submillimetre 46 X ray pulses 46 Upsilon Andromedae 46 microquasar 46 YES2 46 optical wavelengths 46 NanoSail D 46 ExoMars 46 mesosphere 46 Moessbauer 46 spacetime 46 SOHO spacecraft 46 Epsilon Eridani 46 David Southwood ESA 46 supernova explosion 46 AAVSO 46 planet Uranus 46 ESO PR 46 magnetar 46 NASA WMAP 46 Winglee 46 jovian 46 ultraviolet spectrometer 46 Kuiper belt objects 46 radiotelescope 46 pulsars 46 Werthimer 46 ATLAS detector 46 polarimetric 46 VISTA telescope 46 UKIRT 46 Konacki 46 Comet Holmes 46 microlensing events 46 weak gravitational lensing 46 Cepheids 46 Cryosat 46 Mercury flyby 46 cosmological parameters 46 Flyby 46 Interstellar Boundary Explorer 46 CloudSat 46 ESA Proba 46 Cepheid variables 46 substorm 46 heliospheric 46 Gerhard Schwehm 46 Cancri e 46 ASTRON 46 CERN LHC 46 Kepler spacecraft 46 elliptical galaxies 46 orbiting gamma ray 46 Kepler Space Telescope 46 galaxy cluster 46 NASA Chandra 46 XMM Newton observatory 46 OGLE 46 Hubble Ultra 46 WISE telescope 46 Smithsonian astronomer 46 telescopic observations 46 blazars 46 GRACE satellites 46 Infrared Array Camera 46 radial velocity measurements 46 gamma ray flares 46 Laser Interferometer Gravitational Wave 46 Spitzer infrared telescope 46 galaxy formation 46 Mazzali 46 interferometer 46 Submillimeter 46 Neutron Spectrometer 46 particle collisions 46 Orion Nebula 46 neutral mass spectrometer 46 spacecraft 46 microlensing 46 Interior Laboratory GRAIL 46 quark gluon plasma 46 GJ #b [002] 46 Digitized Sky Survey 46 earthshine 46 planets orbiting distant 46 magnetosphere 46 Lyman alpha 46 Carey Lisse 46 Mössbauer spectrometer 46 Lunar Reconnaissance Orbiter 46 planet Gliese #g 46 James Fanson 46 celestial mechanics 46 radiometers 46 TrES 4 46 GQ Lupi 46 distant galaxy 46 microscopic imager 46 Cassini Huygens spacecraft 46 exo planet 46 backscattered 46 Mauna Kea Hawaii 46 Mojzsis 46 Frank Bertoldi 46 ultraviolet spectrograph 45 binary asteroid 45 superluminal 45 Magnetic Imager HMI 45 Saturnian moon Titan 45 NEAR Shoemaker 45 SN #A 45 active galactic nuclei 45 spectroscope 45 orbits 45 Bottke 45 Antenna LISA 45 Jenniskens 45 orbiting Hubble Space Telescope 45 Sromovsky 45 Fermi Gamma ray 45 Gal Yam 45 dust enshrouded 45 orbiting observatory 45 particle detectors 45 PSR J# 45 protoplanet 45 asteroseismology 45 distant supernovae 45 VIRTIS instrument 45 orbited Jupiter 45 gamma ray 45 Orbiter 45 EPOCh 45 gravitational microlensing 45 Marchis 45 ESO astronomer 45 flyby 45 galactic cosmic ray 45 Itokawa 45 interacting galaxies 45 moon Ganymede 45 Jovian moons 45 spectrographs 45 Komossa 45 spectrometers 45 photons emitted 45 Helioseismic 45 gamma ray emission 45 Exoplanet 45 photons 45 Mini TES 45 optical microscopy 45 antineutrinos 45 Fermi 45 celestial observations 45 Scheeres 45 THEMIS spacecraft 45 Keck Interferometer 45 celestial objects 45 auroral 45 Itokawa asteroid 45 Delta Cephei 45 globular clusters 45 radiometer 45 heliosphere 45 Robotic Exploration 45 Mars Pathfinder 45 nebulae 45 Stardust NExT 45 Mossbauer 45 Johannes Kepler 45 distant supernovas 45 Martian dust 45 distant quasar 45 interstellar cloud 45 radial velocity method 45 spacecraft Cassini 45 martian surface 45 OGLE TR 45 wavelengths 45 submillimeter galaxies 45 ion propulsion 45 Earthshine 45 SPICAM 45 infrared ultraviolet 45 celestial bodies 45 Stardust spacecraft 45 X ray observatories 45 neutrino oscillations 45 magnetars 45 Comet #P/Churyumov-Gerasimenko 45 Dominique Cassini 45 protostars 45 Gliese #c 45 Maxwell equations 45 blackbody 45 merging galaxies 45 SIRAL 45 Milky Way 45 Astrophysicists 45 NASA ICESat 45 luminosities 45 Andromeda Galaxy 45 Keck telescope 45 Hubble Telescope 45 proplyds 45 Jean Luc Margot 45 infrared telescope 45 Photometric Imaging Receiver 45 accretion disk 45 neutrino oscillation 45 SeaWiFS 45 planets orbiting 45 Corot 9b 45 CfA 45 Wolf Rayet stars 45 Credits ESA 45 planetary astronomy 45 Edwin Hubble 45 Extrasolar Planets 45 Mercury magnetosphere 45 Comet Halley 45 Hanny Voorwerp 45 J# +# [002] 45 spectrograph 45 exoplanet orbiting 45 Foton M2 45 galaxy redshift 45 submillimeter wavelength 45 Very Large Telescope 45 lunar regolith 45 magnetic anisotropy 45 Optical Gravitational Lensing Experiment 45 faint galaxies 45 HM Cancri 45 axions 45 Kuiper Belt object 45 Gamma ray burst 45 Mars Reconnaissance Orbiter 45 cosmic 45 adaptive optics 45 gamma ray telescopes 45 flyby spacecraft 45 Compton Gamma Ray 45 SPIRE 45 ray Space Telescope 45 ESO Very Large Telescope 45 Solar Dynamics Observatory 45 Lunine 45 SCIAMACHY 45 Fermi telescope 45 RS Ophiuchi 45 MERIS 45 Earthlike 45 FORCAST 45 Shepherding Spacecraft 45 Bojowald 45 NASA Stardust spacecraft 44 HiRISE image 44 Long Wavelength Array 44 Gravitational Physics 44 Nikku Madhusudhan 44 comets asteroids 44 Astrophysics Cambridge Mass. 44 Mastcam 44 Infrared Pathfinder Satellite 44 hyperspectral imager 44 orbiting telescopes 44 UA Steward Observatory 44 Hawking radiation 44 ejecta 44 Nasa Mars Odyssey 44 Astrophysics 44 Spectrometer 44 smallest exoplanet 44 Exoplanets 44 Heliospheric Observatory SOHO 44 high redshift galaxies 44 UVES 44 interferometric 44 infrared interferometry 44 Jupiter magnetosphere 44 Helix nebula 44 gradiometer 44 quantum gravity 44 moon Charon 44 LAGEOS 44 observable universe 44 dwarf galaxies 44 NASA MESSENGER spacecraft 44 NASA Great Observatories 44 NASA ESA Hubble 44 polaritons 44 ecliptic 44 colliders 44 Keck Observatory 44 exoplanets planets 44 cometary material 44 Mars 44 Remijan 44 retrograde orbit 44 atomic nuclei 44 inhabitable planets 44 NOAO 44 Spectroscopic 44 Grillmair 44 NASA QuikScat satellite 44 Hubble Space 44 Enceladus 44 Neptune Uranus 44 GeV 44 circumstellar disks 44 moonlet 44 magnetic reconnection 44 comet Churyumov Gerasimenko 44 galaxies collide 44 gravitationally bound 44 HiRISE camera 44 planetary missions 44 QCLs 44 outermost planets 44 outer corona 44 planet orbiting 44 asteroid Itokawa 44 LISA Pathfinder 44 Paranal Chile 44 National Synchrotron Light 44 shorter wavelengths 44 optical spectra 44 Helios 2B 44 SINFONI 44 comet Wild 44 proton proton 44 orbiting 44 noctilucent clouds 44 Gaensler 44 rocky planets 44 OSIRIS REx 44 NASA LCROSS 44 NEOSSat 44 arcminutes 44 impactor 44 RHIC 44 EPOXI mission 44 diffraction 44 Bullet Cluster 44 gamma ray detector 44 NASA Solar Terrestrial 44 planet TrES 44 Milky Way halo 44 visible wavelengths 44 Charon 44 NASA Landsat 44 Supersymmetry 44 flyby Cassini 44 supernova explosions 44 protostar 44 gamma rays 44 Gravity Probe B 44 planet Gliese #c 44 supergiant star 44 Gravitational waves 44 ESA GOCE 44 Einstein theory 44 Lunar Orbiter Laser Altimeter 44 Nasa spacecraft 44 Halton Arp 44 Reinhard Genzel 44 constellation Aquarius 44 habitable planet 44 highly elliptical orbits 44 transiting exoplanets 44 Saturnian system 44 NASA COBE satellite 44 cosmic phenomena 44 Kepler #b 44 singularities 44 lunar crater 44 double helix nebula 44 elliptical orbits 44 Hubble Space Telescopes 44 lunar craters 44 Trifid Nebula 44 ULIRGs 44 brown dwarf 44 Space Infrared Telescope 44 Wilkinson Microwave Probe 44 Gravity Probe 44 photon 44 Gondolo 44 planetary astronomer 44 Machholz 44 thermal emission spectrometer 44 BLG #Lb 44 positron 44 Mossbauer spectrometer 44 Hubble orbits 44 RS Oph 44 Omega Centauri 44 faraway galaxies 44 CMEs 44 GRB # 44 Hubble Near Infrared 44 Extragalactic 44 LROC 44 HARPS 44 Mandushev 44 ESO telescope 44 NIRSpec 44 Comet Lulin 44 Crab Nebula 44 foreground galaxy 44 Earth magnetosphere 44 spectroscopically 44 MARSIS instrument 44 Alfven waves 44 comets 44 SSRL 44 Space Telescope GLAST 44 Sunyaev 44 Adaptive Optics 44 FUV 44 trans Neptunian objects 44 Hinode 44 Doppler measurements 44 habitable planets 44 HD #b [002] 44 telescopes 44 comet Boethin 44 infrared spectrometers 44 lunar crust 44 D CIXS 44 Kepler telescope 44 Crab Pulsar 43 Milky Way galaxy 43 ESA SMOS 43 Tempel 1 43 ion microscope 43 quantum mechanical 43 Mpc 43 THEMIS mission 43 MG J# +# 43 OMEGA instrument 43 X ray afterglow 43 Venusian atmosphere 43 comet flyby 43 Lunokhod 43 super Earths 43 Mars Orbiter 43 Mars CRISM 43 chromosphere 43 gamma ray telescope 43 ESA Huygens 43 Henry Bortman 43 Milky Way Galaxy 43 NASAs 43 Carnegie Observatories 43 LHCb 43 visit http:/saturn.jpl.nasa.gov 43 WISE infrared 43 ICESat 43 Einstein theories 43 LRO spacecraft 43 altimetry 43 Hyakutake 43 SHARAD 43 planet HD #b 43 Heliospheric Investigation 43 electron volt 43 cometary dust 43 Papovich 43 Earthscope 43 supernovas 43 dwarf galaxy 43 Planetary Camera 2 43 Spergel 43 metallicity 43 MESSENGER MErcury Surface 43 sized planets orbiting 43 Neutrons 43 DEIMOS 43 Ketterle 43 SNe Ia 43 subatomic 43 Harlow Shapley 43 intracluster 43 Schwehm 43 Vakoch 43 emit X rays 43 mu Arae 43 spectra 43 Mars Phobos 43 Svedhem 43 MPIfR 43 Cassini radar 43 NASA Far Ultraviolet 43 proto galaxies 43 comet #P/Churyumov-Gerasimenko 43 neutralinos 43 orbiter 43 Huygens Probe 43 galaxy 43 MEarth 43 Lutetia 43 diffraction pattern 43 Kashlinsky 43 airglow 43 Tycho Brahe 43 Hörst 43 SDSS III 43 Ocean Salinity SMOS 43 moonlets 43 Gamma ray 43 Korotev 43 Light Microscopy 43 Melosh 43 comet dust 43 Ly alpha 43 MAVEN 43 neutrino detectors 43 Apollo missions 43 photosphere 43 Toutatis 43 W boson 43 orbiting Chandra 43 NASA Compton Gamma 43 Galileo satellites 43 pointings 43 shepherding spacecraft 43 ESA Huygens probe 43 Jupiter Saturn 43 substorms 43 BP Psc 43 supermassive stars 43 THEMIS Images 43 GLAST telescope 43 LHC experiments 43 Cassini flyby 43 Tegmark 43 magnetic monopoles 43 FASTSAT 43 blazar 43 helium atoms 43 transiting planets 43 auroral emissions 43 Heliophysics 43 Infrared Astronomical Satellite 43 orbital 43 Gurnett 43 particle detector 43 galactic halo 43 Earth orbiting satellites 43 superstrings 43 energetic electrons 43 Extraterrestrial Physics 43 Type Ia supernovas 43 NASA Stratospheric Observatory 43 lunar equator 43 X ray telescope 43 particle acceleration 43 phyllosilicates 43 Hubble telescope 43 Bose Einstein condensates 43 supersymmetry 43 Eta Carinae 43 Great Observatories Origins 43 NSLS 43 transmission electron microscopy 43 Hipparchus 43 Rathnasree 43 gamma ray energies 43 Kuiper belt 43 GROND 43 Zeta Ophiuchi 43 Comet Churyumov Gerasimenko 43 CALIPSO 43 supersymmetric 43 tau neutrinos 43 KH #D 43 ENAs 43 Epoxi 43 Corot 43 Jakosky 43 Andromeda galaxy 43 G#.# +#.# 43 Galilean moons 43 planetary 43 supernova 43 VLBI 43 orbiting Mars 43 Arecibo Observatory 43 Yarkovsky effect 43 radar altimetry 43 slender crescent 43 UCO Lick 43 wavelength infrared 43 cosmic gamma rays 43 Boethin 43 NASA twin STEREO 43 AMIE camera 43 lunar orbits 43 Gliese #g 43 planets orbiting sun 43 cosmic particles 43 Pasachoff 43 orbiter lander 43 Cassini spacecraft 43 Gliese #d 43 muon 43 Context Camera 43 Space Agency 43 gravitational lens 43 X ray spectra 43 asteroids 43 NASA Kepler spacecraft 43 relativistic 43 type Ia supernovae 43 antiprotons 43 Sojourner rover 43 Kuiper Belt Object 43 laser spectroscopy 43 galaxy M# [001] 43 Pieter van Dokkum 43 Figer 43 elongated orbits 43 panoramic camera 43 distant galaxy clusters