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(Click for frequent words.) 66 infrared astronomy 64 spectroscopic measurements 63 occultations 63 exoplanetary 63 gravitational lenses 62 Hubble observations 62 XMM Newton 62 Wilkinson Microwave Anisotropy Probe 61 gravitational microlensing 61 astronomers 60 X ray telescopes 60 NASA Wilkinson Microwave 60 X ray observatories 60 astronomical telescope 60 VIRTIS 60 telescopic observations 60 astrophysical phenomena 59 spectroscopic observations 59 intrinsic brightness 59 planetary Transits 59 Cepheids 59 photometry 59 X ray observatory 59 extragalactic 59 optical telescopes 59 infrared telescopes 59 WMAP satellite 59 microlensing events 59 astrometry 59 optical interferometry 59 telescopes 59 APXS 59 KBOs 59 astrometric 59 AB Aurigae 58 millimeter wavelengths 58 Einstein theories 58 ESO VLT 58 spectrographs 58 Higgs bosons 58 situ measurements 58 astrophysical 58 WMAP 58 XMM Newton observations 58 gravitational lensing 58 celestial phenomena 57 planets orbiting distant 57 occultation 57 celestial observations 57 paleomagnetic 57 extrasolar planets 57 ESA XMM Newton 57 ESO telescopes 57 spectrographic 57 astrophysicists 57 cosmic phenomena 57 auroral emissions 57 numerical simulations 57 stellar occultations 57 cosmological distances 57 earthshine 57 spaceborne 57 AERONET 57 supersymmetric particles 57 Higgs particle 57 radial velocity 56 gamma ray observatory 56 microlensing 56 Galilean satellites 56 distant supernovae 56 extrasolar 56 Voyager spacecraft 56 radial velocity technique 56 observatories 56 orbiting observatories 56 gamma ray detectors 56 polarimetry 56 HARPS spectrograph 56 RXTE 56 gravitational lens 56 Mössbauer 56 ESO telescope 56 HARPS instrument 56 COROT 56 Hipparcos 56 radar altimetry 56 Cepheid variables 56 Fermi telescope 56 X ray wavelengths 56 distant quasars 56 LOFAR 56 optical wavelengths 56 Saturn aurora 55 Hubble Space Telescope HST 55 Cancri e 55 orbiting Hubble Space Telescope 55 Evolution Explorer 55 transiting planets 55 GRBs 55 radial velocity measurements 55 interferometers 55 COBE satellite 55 Keck telescope 55 astronomy 55 astronomical phenomena 55 interplanetary spacecraft 55 gravitational wave 55 spiral nebulae 55 fainter objects 55 CoRoT satellite 55 AKARI 55 polarimetric 55 Climate Experiment GRACE 55 adaptive optics 55 Anisotropy Probe WMAP 55 NASA Cosmic Background 55 geoneutrinos 55 Keck telescopes 55 celestial bodies 55 Epsilon Aurigae 55 NASA Chandra 55 Array ALMA 55 telescope 55 particle physics experiments 55 MARSIS 55 smallest exoplanet 55 ULP cepheids 55 eclipsing binary 55 Saturnian moon Titan 55 NASA Far Ultraviolet 55 Kuiper belt objects 55 SIRTF 55 optical spectra 55 HM Cancri 55 redshift 55 astronomical observatories 54 ESO Very Large Telescope 54 planets orbits 54 Planck satellite 54 supercomputer simulations 54 celestial mechanics 54 Earthlike planets 54 extrasolar planetary systems 54 orbiting gamma ray 54 Keck Interferometer 54 Diviner 54 WM Keck Observatory 54 spacecraft Cassini 54 Christophe Lovis 54 extrasolar planet 54 Mars landers 54 Lunar Reconnaissance Orbiter LRO 54 flyby Cassini 54 superfluids 54 observational astronomy 54 gamma ray telescopes 54 radio occultation 54 cosmological observations 54 VLTI 54 airglow 54 ESO Paranal Observatory 54 magnetars 54 cosmological parameters 54 Gravitational waves 54 Delta Cephei 54 Ulysses spacecraft 54 radial velocity method 54 KamLAND 54 spectroscopic analysis 54 interferometry 54 pointings 54 particle detectors 54 Herschel Space 54 X ray Observatory 54 RHESSI 54 planetary missions 54 Tevatron experiments 54 Anisotropy Probe 54 Cassini Huygens 54 type Ia supernova 54 axions 54 SMOS 54 planemos 54 cosmological theories 54 astronomical telescopes 54 Ultraviolet Imaging Spectrograph UVIS 54 THEMIS satellites 54 GJ #b [001] 54 planetary nebulae 54 UKIRT 54 faint galaxies 54 HARPS spectrograph attached 53 Galileo spacecraft 53 GALEX 53 Gravitational lensing 53 Cosmic Microwave Background 53 particle astrophysics 53 Fomalhaut b 53 redshifts 53 Solar TErrestrial RElations Observatory 53 infrared observatory 53 Kuiper Belt Objects 53 NASA Cassini spacecraft 53 ESA Herschel 53 aurorae 53 occulted 53 galaxy formation 53 cosmic microwave radiation 53 ESA Integral 53 interferometer 53 synchrotron x ray 53 CMB radiation 53 Composite Infrared Spectrometer 53 Bojowald 53 ROSAT 53 spectroscopic 53 Saturn rings 53 ESA SMART 53 ESA Cluster 53 AGNs 53 Earth orbiting satellites 53 Konacki 53 Mars orbiters 53 Orbiter LRO 53 radiometric dating 53 Optical Gravitational Lensing Experiment 53 antineutrinos 53 cosmologists 53 WFC3 53 OGLE TR #b 53 STEREO spacecraft 53 Ring Nebula 53 dynamical evolution 53 neutrino oscillation 53 IceCube 53 luminous galaxies 53 laser altimeter 53 planets atmospheres 53 LHC experiments 53 transiting exoplanets 53 submillimetre 53 X ray pulses 53 zodiacal light 53 SCIAMACHY 53 Maunder minimum 53 SN #A 52 ICESat 52 Geminga 52 Gamma ray burst 52 auroral 52 supersymmetric 52 Nasa spacecraft 52 UVOT 52 BepiColombo 52 infrared spectrograph 52 exoplanets planets 52 NASA THEMIS 52 reionization 52 coronagraph 52 asteroid collisions 52 Explorer WISE 52 SDSS II 52 VLBI 52 ESA Planck 52 stellar seismology 52 XMM Newton satellite 52 noctilucent clouds 52 alien civilizations 52 Martian craters 52 exo planet 52 martian meteorites 52 X ray emission 52 retrograde orbit 52 Rosetta orbiter 52 Einstein equations 52 RS Ophiuchi 52 sterile neutrino 52 earthlike planets 52 mineralogical composition 52 Henize #-# 52 Astrophysicists 52 neutrino particles 52 filamentary structure 52 Keck Observatory 52 Sushil Atreya 52 lunar craters 52 moonquakes 52 planets orbiting sun 52 Heterodyne Instrument 52 LRO spacecraft 52 chemical abundances 52 Milky Way halo 52 spectroscope 52 X ray binary 52 NASA ICESat 52 Very Large Telescope 52 Cosmic Origins Spectrograph COS 52 highly elliptical orbits 52 infrared telescope 52 Mauna Kea Hawaii 52 Dalcanton 52 Krimigis 52 SINFONI 52 Mossbauer spectrometer 52 astronomical objects 52 exoplanets orbiting 52 Near Infrared Camera 52 gamma ray burst 52 radial velocities 52 singularities 52 eclipsing binaries 52 auroral displays 52 FORCAST 52 quasars 52 cosmological models 52 detect gravitational waves 52 trans Neptunian objects 52 cosmic ray 52 theoretical calculations 52 gamma ray observatories 52 outermost planets 52 millisecond pulsars 52 planets asteroids 52 brown dwarfs 52 Submillimeter Array 52 Adaptive optics 52 Cosmologists 52 Nikku Madhusudhan 52 Huygens mission 52 transiting planet 52 meter Keck telescopes 52 gravitational wobbles 52 exoplanet hunter 52 VISTA telescope 52 HD#b 52 orbiting telescopes 52 relativity theory 52 Elenin 52 active galactic nuclei 51 Comet Halley 51 extrasolar worlds 51 TerraSAR X 51 thermodynamic calculations 51 ecliptic plane 51 general relativity 51 spectroscopically 51 Spectrograph 51 astrophysical objects 51 Wilkinson Microwave Probe 51 Landsat satellites 51 NASA Cassini 51 rocky extrasolar planet 51 diffraction pattern 51 submillimeter wavelengths 51 asteroseismology 51 Moon Mineralogy Mapper M3 51 cosmology 51 Mini TES 51 photometer 51 interferograms 51 Corot 9b 51 spectrometers 51 cryovolcanism 51 afterglows 51 Convection Rotation 51 Kepler Mission 51 planetary transits 51 exo planets 51 supernovae 51 Spitzer Space Telescope 51 distant galaxies 51 type Ia supernovae 51 SeaWiFS 51 axial tilt 51 cosmic microwave background 51 aerosol measurements 51 Orbiter MRO 51 HD #b [002] 51 hexagonal mirrors 51 astrobiological 51 AAVSO 51 Cassini flyby 51 NuSTAR 51 infrared spectrometers 51 Noctilucent clouds 51 elliptical orbits 51 gamma ray bursts 51 satellites orbiting Earth 51 substorms 51 novae 51 radiometers 51 blazars 51 superstrings 51 Mercury flyby 51 Type Ia supernovae 51 Planetary Camera 2 51 cometary material 51 ESO PR 51 HiRISE image 51 Hawking radiation 51 extrasolar planetary 51 orbiting Chandra 51 Venusian atmosphere 51 spectroscopy 51 gravitational waves 51 CERN LHC 51 planets 51 Herschel Planck 51 frequency combs 51 elliptical galaxies 51 Arches Cluster 51 pulsars 51 Upsilon Andromedae 51 superstring theory 51 SMOS mission 51 exoplanet 51 sunlike stars 51 lensing galaxy 51 Keck Telescope 51 Galaxy Evolution 51 X ray spectrometer 51 constellation Eridanus 51 Cassini 51 PSR J# 51 transiting exoplanet 51 inch Samuel Oschin 51 starquakes 51 P/# A2 51 Pieter van Dokkum 51 INTEGRAL satellite 51 icy moons 51 planetary orbits 51 MicroFUN 51 orbiting observatory 51 infrared spectra 51 RRATs 51 masers 51 VIRTIS instrument 51 Galilean moons 51 ESO astronomer 51 galaxy redshift 51 permanently shadowed regions 51 planets circling 51 Magellanic Clouds 51 ultraviolet wavelengths 51 ALMA antennas 51 Omega Centauri 51 Beta Pictoris b 51 Infrared Astronomical Satellite 51 globular clusters 51 Enceladus flybys 51 stellar occultation 51 Epsilon Eridani 51 Viking landers 51 CloudSat 51 Crab Pulsar 51 Type Ia supernova 51 ultracold atoms 51 ray Space Telescope 51 auroral activity 50 Planetary Fourier Spectrometer PFS 50 galactic cosmic rays 50 binary asteroid 50 UDFy # 50 SPICAM 50 muon neutrino 50 Alfven waves 50 orbited Jupiter 50 Martian meteorites 50 Jovian moons 50 Sasselov 50 faraway galaxies 50 N. Rathnasree 50 Hubble Constant 50 nucleosynthesis 50 CoRoT 9b 50 intracluster 50 Wolszczan 50 Planetary Transits 50 Astrophysical 50 cosmic ray flux 50 astronomer 50 coronal heating 50 Nasa Kepler 50 SQUIDs 50 spacecraft flyby 50 protoplanetary disks 50 electron neutrinos 50 Digitized Sky Survey 50 Quadrantids 50 Earth magnetosphere 50 Spitzer infrared 50 Planck telescope 50 neutron spectrometer 50 Fermi LAT 50 journal Meteoritics 50 diffraction patterns 50 multiwavelength 50 astronomical calculations 50 planetary conjunctions 50 spectral measurements 50 cosmological 50 Einstein theory 50 SN #gy 50 planet Gliese #g 50 Adam Riess 50 Hipparchus 50 celestial objects 50 SEGUE 50 coronal loops 50 Sara Seager 50 Kepler 50 VLBA observations 50 MiniBooNE 50 Alpha Particle 50 IBEX spacecraft 50 satellite altimetry 50 blackbody 50 NASA COBE satellite 50 millisecond pulsar 50 BLG #Lb 50 APEX telescope 50 ESA Rosetta 50 CoRoT 50 lunar orbits 50 unmanned probes 50 Huygens 50 Oscillations 50 Rosetta spacecraft 50 assumed planets circling 50 hydrated minerals 50 Mercury magnetosphere 50 type 1a supernovae 50 constellations Cygnus 50 homochirality 50 SNfactory 50 interferometric 50 exoplanets 50 Venus transits 50 interstellar molecules 50 Antarctic Dry Valleys 50 STEREO satellites 50 photons emitted 50 Great Observatories 50 Saturnian moons 50 gravitational redshift 50 Mars CRISM 50 Halzen 50 AU Mic 50 SOHO spacecraft 50 Herschel telescope 50 ionospheric 50 baryonic matter 50 entangled quantum 50 Triangulum Galaxy 50 planets orbiting stars 50 solar nebula 50 weak gravitational lensing 50 planetary 50 HRSC 50 cosmic particles 50 THEMIS 50 Foing 50 ephemeris 50 VLBA 50 neutrino mass 50 Voorwerp 50 Interferometer 50 XMM Newton X ray 50 geoid 50 Pasachoff 50 photosphere 50 subsurface ocean 50 dwarf spheroidal galaxies 50 orbital rendezvous 50 Giovanni Cassini 50 cosmic rays 50 Lunar Prospector 50 polar stratospheric 50 CALIPSO 50 Mars Reconnaissance Orbiter MRO 50 optical telescope 50 Type Ia supernovas 49 amateur astronomers 49 magnetospheric 49 quantum entanglement 49 Astronomers 49 solar corona 49 La Silla observatory 49 theoretical physicists 49 interferometric technique 49 heliospheric 49 interstellar dust 49 superfluidity 49 gaseous planet 49 ESA Envisat satellite 49 COROT 7b 49 geomagnetism 49 starburst galaxies 49 Cassini flybys 49 Landsat satellite 49 SCP #F# 49 Very Large Array 49 colliders 49 gamma ray emission 49 Spudis 49 supermassive 49 spherical geometry 49 THEMIS spacecraft 49 Bose Einstein condensates 49 Planck spacecraft 49 Tycho supernova 49 theoretical astrophysics 49 biosignatures 49 dynamical 49 ESA Mars 49 Aristarchus 49 visible wavelengths 49 SIM PlanetQuest 49 physicists 49 Avishay Gal Yam 49 Spitzer infrared spectrograph 49 D CIXS 49 Infrared Array Camera 49 Harlow Shapley 49 cosmic ray observatory 49 habitable planets 49 isotopic ratios 49 Kepler telescope 49 MARSIS radar 49 Grillmair 49 XMM Newton observatory 49 neutralinos 49 retroreflector 49 WIYN 49 submillimeter wavelength 49 solar eclipses 49 Descent Imager Spectral Radiometer 49 paleoclimate records 49 jovian 49 measurements 49 J# +# [002] 49 phyllosilicates 49 TrES 4 49 EarthScope 49 HiRISE camera aboard 49 atmospheric turbulence 49 Toutatis 49 particle acceleration 49 GOCE 49 Herschel Space Telescope 49 GROND 49 muon neutrinos 49 moons Phobos 49 Cosmic Microwave Background CMB 49 Envisat 49 retrograde orbits 49 permanently shadowed craters 49 neutrinos 49 braneworld black 49 chondrites 49 Dauphas 49 elliptical galaxy NGC 49 George Djorgovski 49 HUDF 49 distant quasar 49 planetary alignments 49 lunar crust 49 X ray spectroscopy 49 Einstein relativity 49 NASA Mars Odyssey 49 spatially resolved 49 Climate Experiment 49 Tod Strohmayer 49 NEOSSat 49 Hubble Near Infrared 49 faraway planets 49 EPOCh 49 Higgs boson particle 49 Gamma ray 49 Wide Angle Search 49 celestial sphere 49 inhabitable planets 49 quasicrystals 49 Ground penetrating radar 49 Atacama Large Millimeter Array 49 mu Arae 49 galactic mergers 49 spacecraft orbiting 49 electrodynamics 49 Amateur astronomers 49 Cometary 49 discover Fomalhaut 49 Bose Einstein condensation 49 gamma ray 49 Kepler spacecraft 49 interstellar dust grains 49 extrasolar planets orbiting 49 Mini SAR 49 AMSR E 49 constellations planets 49 Astrophysical Journal 49 HiRISE camera 49 Titan flyby 49 particle detector 49 Burst Alert 49 Magnetic Imager HMI 49 brightnesses 49 Synchrotron radiation 49 slender crescent 49 seismology 49 asteroid orbit 49 circumstellar disks 49 supernovas 49 Jonathan Lunine 49 EPOXI 49 moons orbiting 49 GJ#b 49 abiogenesis 49 high temperature superconductivity 49 interstellar clouds 49 Pluto Charon 49 orbiting spacecraft 49 infrared spectroscopy 49 Subaru telescope 49 Filippenko 49 lunar regolith 49 NOAO 49 quantum electrodynamics 49 spectroscopic techniques 49 Planetary Science Institute 49 orbiting telescope 49 orbital mechanics 49 Doppler measurements 49 scanning tunneling microscopy 49 attosecond 49 Lunar Orbiter Laser Altimeter 49 TanDEM X 49 Alfvén waves 49 submillimeter 49 Telescope Array 49 Mario Livio 49 elemental abundances 49 neutrino experiments 49 visit http:/saturn.jpl.nasa.gov 49 lunar orbiters 49 remotely sensed 49 NASA QuikScat satellite 49 Chilean Atacama Desert 49 Galileo Galilei #-# 49 frequency comb 49 Saturn moon Enceladus 49 asteroids comets 49 ESA ERS 49 Corot 7b 49 constellation Ursa Major 49 planetary astronomer 49 geochemists 49 radiotelescope 49 David Southwood ESA 49 observations 49 DZero 48 exosphere 48 C1XS 48 microlensing technique 48 Area Telescope LAT 48 GRB # 48 paleoclimate 48 Lunine 48 Gemini Observatory 48 Stéphane Udry 48 Avi Loeb 48 geostationary orbits 48 Fourier transforms 48 Geminids 48 optical spectroscopy 48 Greg Delory 48 magnetic reconnection 48 shadowy craters 48 galaxies 48 ARPES 48 Auger Observatory 48 Philae lander 48 Raman spectra 48 computer simulations 48 backscattered 48 Virgo Cluster 48 NASA WMAP 48 KAGUYA 48 Solar Terrestrial Relations 48 Chajnantor 48 IYA# 48 called gravitational microlensing 48 Shuttle Radar Topography 48 Multi Object Spectrograph 48 galaxy clusters 48 auroras 48 Gliese #g 48 dynamical processes 48 Astronomy 48 Cryosat 48 Gliese #c 48 LCLS 48 proton proton collisions 48 prebiotic chemistry 48 LORRI 48 DISR 48 Earth ionosphere 48 noble gases 48 Maxwell equations 48 photometric 48 shorter wavelengths 48 HIRES spectrometer 48 Gliese #d 48 giant gaseous planets 48 antiparticle 48 Huygens descent 48 heliophysics 48 solar irradiance 48 NASA Infrared Telescope 48 NASA LCROSS 48 exoplanet orbiting 48 Keck Telescopes 48 microshutters 48 Gamma ray bursts 48 imaging spectrometer 48 Tarduno 48 X ray diffraction 48 Envisat ASAR 48 X ray Telescope XRT 48 absorption spectra 48 baryons 48 polar regions 48 comet nucleus 48 Saul Perlmutter 48 laser spectroscopy 48 X ray photons 48 journal Icarus 48 Mars Color Imager 48 HESS telescopes 48 Milankovitch cycles 48 Observatory STEREO 48 optical microscopy 48 crustal thickness 48 Io Europa 48 Werthimer 48 KIPAC 48 astronomer Johannes Kepler 48 astrophysics 48 Cygnus X 48 spectral fingerprint 48 optical microscope 48 Pan STARRS 48 dust enshrouded 48 radiometry 48 observationally 48 SUSY 48 WASP #b 48 Saturn Cassini 48 Diviner instrument 48 Einstein relativity theory 48 UVES 48 Gravity Probe B 48 Saturn auroras 48 Quadrantid meteor shower 48 RPWS 48 isotopic 48 KH #D 48 THz radiation 48 heavily cratered 48 CDMS experiment 48 Spacewatch 48 THEMIS mission 48 heliocentric model 48 Ken Herkenhoff 48 Cosmic Background Explorer COBE 48 Martian rover 48 gravity warps 48 femtosecond timescale 48 Space Telescope 48 spectrometer 48 Cosmic Evolution 48 Samuel Oschin Telescope 48 STScI 48 Suzaku X ray 48 Project Ozma 48 X ray telescope 48 Orionids 48 comet nuclei 48 synchrotrons 48 Mars orbiter 48 planetary atmospheres 48 axion 48 Rayleigh scattering 48 Long Wavelength Array 48 Red Rectangle 48 Carina constellation 48 Odyssey orbiter 48 neutrino oscillations 48 cryosphere 48 extraterrestrial civilizations 48 gamma ray spectrometer 48 flybys 48 Ultraviolet Optical Telescope 48 orbital eccentricity 48 long baseline interferometry 48 habitable worlds 48 atmospheric phenomena 48 RS Oph 48 lunar equator 48 moon Europa 48 SN#A 48 Astrophysical Institute 48 Aerial photography 48 Remote sensing 48 EVLA 48 photochemical reactions 48 Earthlike planet 48 spatial dimensions 48 moons circling 48 infrared wavelength 48 Adaptive Optics 48 Hubble Telescope 48 magnetic substorms 48 electroweak 48 atmospheric aerosols 48 impactors 48 MINOS 48 Oort cloud 48 lunar poles 48 spectra 48 Interferometer VLTI 48 celestial 48 quantum phenomena 48 Huygens lander 48 Jupiter moons 48 robotic telescopes 48 Gregory Asner 48 Southern Observatory ESO 48 Astrophysics Cambridge Mass. 48 rotational axis 48 sparticles 48 fundamental constants 48 radiative transfer 48 JWST 48 Computer simulations 48 distant galaxy 48 boson 48 HARPS N 48 quantum teleportation 48 NASAs 48 remote sensing satellites 48 planets comets 48 Gemini telescopes 48 HiRISE images 48 constellations 48 quantum physicists 48 lunar soil 48 Gaensler 48 distant galaxy clusters 48 Cloud Aerosol Lidar 48 hematite mineral 48 Atacama Large Millimeter submillimeter 48 Mars orbiting spacecraft 48 Global Surveyor 48 galactic bulge 48 Cygnus Lyra region 48 lunar meteorites 48 SN Ia 48 neutralino 48 Earthlike 48 NASA STEREO 48 mineralogical mapping 48 Bruce Jakosky 48 fluorescence excitation 48 Neptune Uranus 48 x ray diffraction 48 spectral characteristics 48 planetary geologists 48 smoothest flattest 48 Infrared Astronomical Satellite IRAS 48 UCO Lick 48 Comet Hartley 2 48 InSAR 48 orbital angular momentum 48 Hubble orbits 48 WISE infrared 48 observatory 48 undiscovered particle 48 Meridiani 48 Curiosity rover 48 Johannes Kepler 47 Faint Object 47 fractal patterns 47 Astrophysical Research 47 DEIMOS 47 moon Mab 47 Heliospheric Observatory SOHO 47 precise measurements