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(Click for frequent words.) 70 Wilkinson Microwave Anisotropy Probe 70 NASA Wilkinson Microwave 69 cosmic microwave background 68 WMAP satellite 65 Anisotropy Probe WMAP 65 Anisotropy Probe 64 Hubble observations 63 Cosmic Microwave Background CMB 62 XMM Newton 61 COBE 61 HUDF 61 Cosmic Microwave Background 60 redshift 60 NASA Cosmic Background 60 Cosmic Background Explorer COBE 59 redshifts 59 Cosmic Background Explorer 59 spectroscopic observations 59 GRBs 59 NASA WMAP 59 SDSS II 59 Spitzer Space Telescope 59 cosmologists 59 distant galaxies 59 NASA Chandra 59 reionization 59 filamentary structure 58 X ray telescopes 58 astronomers 58 RHESSI 58 quasars 58 Planck 58 distant quasars 58 cosmic microwave radiation 58 astronomical observations 58 Planck telescope 58 distant supernovae 57 COROT 57 AGNs 57 X ray Observatory 57 gravitational lensing 57 X ray observatory 57 Wilkinson Microwave Probe 56 Fomalhaut b 56 galaxy clusters 56 photometry 56 astrophysicists 56 Fermi telescope 56 radial velocity 56 galaxies 56 Type Ia supernovae 56 AKARI 56 Planck satellite 56 gamma ray bursts 56 THEMIS 55 planetary Transits 55 RXTE 55 spectroscopic 55 Space Telescope 55 UVOT 55 galaxy cluster 55 GALEX 55 elliptical galaxies 55 VIRTIS 55 Herschel telescope 55 astrophysical 55 cosmic strings 55 gravitational radiation 55 supernova remnants 55 supernovae 55 exoplanetary 55 gamma ray burst 55 extragalactic 55 Explorer WISE 55 GRB #B 55 intracluster 55 weak gravitational lensing 55 AB Aurigae 55 Galileo spacecraft 55 Mössbauer 55 Epsilon Eridani 55 GJ #b [001] 55 ROSAT 55 HD#b 55 Edwin Hubble 55 solar nebula 55 quasar 54 extrasolar 54 planetary nebulae 54 supernova remnant 54 Diviner 54 optical telescopes 54 galaxy formation 54 earthshine 54 Evolution Explorer 54 faint galaxies 54 cosmological 54 WASP #b 54 SIRTF 54 Astrophysicists 54 SN #A 54 interferometry 54 exoplanets 54 VLBA 54 intrinsic brightness 54 starburst galaxies 54 type Ia supernova 54 Delta Cephei 54 exoplanet 54 Cepheids 54 NICMOS 54 Chandra X ray 54 imaging spectrometer 54 Infrared Array Camera 54 Galaxy Evolution 54 protoplanetary disks 54 X ray emission 54 spectroscopic measurements 54 Fermi LAT 54 microlensing 54 NASA Cassini spacecraft 54 ESO VLT 54 Kailash Sahu 54 Kuiper belt objects 53 brown dwarfs 53 EPOXI 53 Hipparcos 53 Infrared Astronomical Satellite 53 Climate Experiment GRACE 53 Cosmologists 53 spectroscopically 53 ESA XMM Newton 53 KBOs 53 microlensing events 53 optical wavelengths 53 SNR #-#.# 53 THEMIS satellites 53 Cassini 53 Planetary Camera 2 53 distant galaxy 53 CMB radiation 53 Vikhlinin 53 Great Observatories 53 Crab Nebula 53 G#.# +#.# 53 Gravitational lensing 53 gamma ray emission 53 HD #b [002] 53 type Ia supernovae 53 Keck Interferometer 53 general relativity 53 SN#A 53 globular clusters 53 Keck telescope 53 ray Space Telescope 53 WFC3 53 polarimetry 53 Krimigis 52 active galactic nuclei 52 Cancri e 52 axion 52 Type Ia supernovas 52 gravitational microlensing 52 NASA Far Ultraviolet 52 magnetic reconnection 52 solar corona 52 Lyman alpha 52 Hubble Ultra 52 SNfactory 52 occultations 52 optical interferometry 52 P/# A2 52 Mimas 52 Earthlike planets 52 X ray afterglow 52 spectra 52 X ray observatories 52 CRISM 52 X ray wavelengths 52 Fermi Gamma ray 52 NASA COBE satellite 52 Einstein theory 52 Milky Way halo 52 luminous galaxies 52 cosmic ray 52 magnetar 52 Cat Paw Nebula 52 GRB# 52 comet nucleus 52 Viking landers 52 gaseous planet 52 extrasolar planets 52 novae 52 ULIRGs 52 MARSIS 52 Higgs bosons 52 globular cluster 52 planemos 52 Composite Infrared Spectrometer 52 blackbody 52 gravitational waves 52 Grillmair 52 Ulysses spacecraft 52 radial velocity measurements 52 infrared astronomy 52 cosmological parameters 52 COBE satellite 52 auroral 52 YORP effect 52 Hubble Space Telescope HST 52 XMM Newton observations 52 multiwavelength 52 cosmological distances 52 ESA Integral 51 jovian 51 extrasolar planet 51 Saturn rings 51 interferometers 51 submillimeter 51 observable universe 51 gravitational lenses 51 Hubble Constant 51 Mpc 51 Cassini Huygens spacecraft 51 Adam Riess 51 magma ocean 51 X ray pulses 51 Beta Pictoris 51 attosecond 51 cosmological theories 51 Mars Reconnaissance Orbiter 51 WM Keck Observatory 51 transiting planets 51 ESA Planck 51 Kashlinsky 51 infrared telescopes 51 RS Ophiuchi 51 Cepheid variables 51 DZero 51 supernova explosion 51 distant quasar 51 SMOS 51 VLTI 51 Kuiper Belt Objects 51 SNe Ia 51 Spectrometer 51 ESA Herschel 51 SeaWiFS 51 nucleosynthesis 51 DEEP2 51 axions 51 Triangulum Galaxy 51 stellar occultations 51 Cassini flyby 51 blazars 51 AU Mic 51 orbiting gamma ray 51 KamLAND 51 Orion Nebula 51 SN Ia 51 Raman spectroscopy 51 Trifid Nebula 51 Type Ia supernova 51 auroral emissions 51 KH #D 51 Red Rectangle 51 ESO Very Large Telescope 51 NuSTAR 51 Seyfert galaxies 51 UKIRT 51 Big Bang theory 51 lensing galaxy 51 TrES 4 51 X ray spectrometer 51 planets orbiting 51 photometer 51 pulsars 51 gamma ray observatory 51 Mercury flyby 51 Epsilon Aurigae 51 photoemission 51 NASA Fermi Gamma 51 brightnesses 51 magnetospheric 51 infrared wavelengths 51 infrared observatory 51 protostars 51 supersymmetric particles 51 GRB # 51 SINFONI 50 lunar crust 50 eclipsing binary 50 Digitized Sky Survey 50 Mini TES 50 planets orbiting distant 50 Convection Rotation 50 protoplanetary disk 50 substorm 50 detect gravitational waves 50 Corot 7b 50 Gliese #d 50 millisecond pulsars 50 spectrographic 50 Cosmic Evolution 50 Lunar Orbiter Laser Altimeter 50 elliptical galaxy 50 supernovas 50 exoplanets orbiting 50 Einstein equations 50 telescopic observations 50 RS Oph 50 radio occultation 50 interferometric 50 neutrino oscillations 50 orbiting Chandra 50 interferometer 50 total solar irradiance 50 Gravitational waves 50 Kepler telescope 50 David Spergel 50 Clementine spacecraft 50 Gal Yam 50 pointings 50 antineutrinos 50 TrES 50 SUSY 50 planets 50 Lunar Reconnaissance Orbiter LRO 50 JDEM 50 astronomical objects 50 VLBI 50 quark gluon plasma 50 Chandra Observatory 50 fainter objects 50 Keck Telescope 50 matter antimatter asymmetry 50 MINOS 50 NEOWISE 50 Bullet Cluster 50 RRATs 50 astrometry 50 heavily cratered 50 Iapetus 50 Astrophysics Cambridge Mass. 50 Planetary Transits 50 gamma ray flares 50 Type Ia 50 spectroscopy 50 Higgs particle 50 numerical simulations 50 Kepler #b 50 LOFAR 50 adaptive optics 50 Gemini Observatory 50 planet orbits 50 z ~ 50 CloudSat 50 gravitational redshift 50 Maxwell equations 50 XMM Newton satellite 50 Mini SAR 50 ChemCam 50 afterglows 50 spatially resolved 50 Coma Cluster 50 CoRoT satellite 50 Maunder minimum 50 brightest supernova 50 high redshift galaxies 49 Gravity Probe B 49 ARPES 49 Voyager spacecraft 49 protoplanet 49 metallicity 49 quantum gravity 49 Martian meteorites 49 Hanny Voorwerp 49 Heterodyne Instrument 49 Saturnian moon 49 supercomputer simulations 49 WISE infrared 49 arcsec 49 millisecond pulsar 49 supernova 49 JWST 49 faintest galaxies 49 pulsar 49 Solar TErrestrial RElations Observatory 49 redshifted 49 JILA 49 Astrophysical Journal 49 Lunine 49 noctilucent clouds 49 constellation Eridanus 49 cosmic ray flux 49 cosmological models 49 brown dwarf 49 LSND 49 neutrinos 49 KT boundary 49 quantum electrodynamics 49 NASA Cassini 49 gravitational lens 49 OGLE TR #b 49 X ray telescope 49 substorms 49 globulars 49 ESA Cluster 49 permanently shadowed craters 49 circumstellar disks 49 asteroseismology 49 cometary 49 BP Piscium 49 NanoSIMS 49 spectrographs 49 telescope 49 Interferometer 49 neutrino 49 proplyds 49 Interstellar Boundary Explorer 49 HiRISE camera 49 Nikku Madhusudhan 49 Cassini Huygens 49 APXS 49 EPOCh 49 heliosphere 49 WFPC2 49 Ultraviolet Imaging Spectrograph 49 baryons 49 electron neutrinos 49 Bose Einstein condensates 49 protostar 49 frequency comb 49 #P/Holmes 49 CoRoT 7b 49 Giovanni Cassini 49 Coma cluster 49 cryovolcanism 49 neutron spectrometer 49 Rayleigh scattering 49 NASA ESA Hubble 49 red supergiants 49 millimeter wavelengths 49 optical spectra 49 ESO telescopes 49 ICESat 49 ejecta 49 Carina Nebula 49 sterile neutrino 49 exo planet 49 Orbiter LRO 49 visible wavelengths 49 Hawking radiation 49 polarimetric 49 ESA ERS 49 cosmic phenomena 49 starburst galaxy 49 XMM Newton X ray 49 galaxy M# [002] 49 galaxy redshift 49 Dalcanton 49 W boson 49 solar neutrinos 49 Virgo Cluster 49 elemental abundances 49 De Pontieu 49 galactic cosmic rays 49 diffraction pattern 49 Lars Hernquist 49 electron volt 49 Eta Carinae 49 merging galaxies 49 Orbiter MRO 49 polar vortex 49 ESO telescope 49 VISTA telescope 49 supernova explosions 49 Saturn moons 49 NASA STEREO 49 Multi Object Spectrometer 49 Mauna Kea Hawaii 49 MiniBooNE 49 Geminga 49 Saturn aurora 48 Burst Alert 48 Infrared Astronomy Satellite 48 photon fluorescence 48 arcminutes 48 Henize #-# 48 Gaensler 48 Pancam 48 transiting exoplanets 48 star Gliese 48 Beta Pictoris b 48 type 1a supernovae 48 Harlow Shapley 48 maser 48 dwarf galaxy 48 Einstein theories 48 moonlet 48 supersymmetric 48 extrasolar planetary systems 48 Virgo cluster 48 neutrino oscillation 48 Adaptive optics 48 GLAST 48 NASA Goddard 48 BLG #Lb 48 galaxy M# [001] 48 nebular 48 Keck Observatory 48 LAGEOS 48 ionized hydrogen 48 Nasa spacecraft 48 moonquakes 48 Sunyaev 48 submillimetre wavelengths 48 Lunar Prospector 48 martian meteorites 48 zodiacal light 48 laser altimeter 48 C1XS 48 radial velocity technique 48 V# Mon 48 submillimeter wavelengths 48 DISR 48 Compact Reconnaissance Imaging Spectrometer 48 Dwarf galaxies 48 Gerard Kuiper 48 isotopic 48 Saturn magnetosphere 48 Dauphas 48 colliding galaxies 48 Submillimeter Array 48 NASA Great Observatories 48 twin STEREO spacecraft 48 astronomer 48 Earth magnetosphere 48 backscattered 48 Alfvén waves 48 periodicities 48 magnetic polarity 48 interstellar dust 48 heliospheric 48 SCIAMACHY 48 Spectrograph 48 stellar seismology 48 exoplanet orbiting 48 Nasa Kepler 48 trans Neptunian objects 48 terrestrial planets 48 tropospheric 48 Very Large Array 48 Planck spacecraft 48 Astronomers 48 lobate scarps 48 interstellar medium 48 spiral nebulae 48 gravitational wave 48 Infrared Thermal Imaging Spectrometer 48 primitive meteorites 48 quantum particle 48 THEMIS spacecraft 48 LORRI 48 NASA Interstellar Boundary 48 geoneutrinos 48 Kepler 48 superstrings 48 journal Icarus 48 NASA Kepler 48 proton proton 48 astrometric 48 proto cluster 48 magnetars 48 Field Imager 48 dust enshrouded 48 ionospheric 48 quantum mechanics 48 NASA THEMIS 48 NASA Voyager spacecraft 48 Carnegie Observatories 48 HAT P 48 Comet Halley 48 photoelectron 48 Gliese #c 48 Cassini flybys 48 red supergiant 48 extrasolar planets orbiting 48 CoRoT 48 Jupiter flyby 48 orbiting observatories 48 interstellar clouds 48 electroweak 48 Tod Strohmayer 48 Astrophysical Journal Letters 48 super Earths 48 GJ#b 48 lunar perigee 48 Moon Mineralogy Mapper 48 ESA SMART 48 Crab Pulsar 48 galaxy NGC 48 radial velocity method 48 Oort cloud 48 MG J# +# 48 Hubble Space Telescope 48 Astrophysical 48 astrophysical phenomena 48 supersymmetry 48 Carina constellation 48 telescopes astronomers 48 Huygens 48 Big Bang 48 neutral mass spectrometer 48 exoplanets planets 48 SIM PlanetQuest 48 neutron stars 48 spectrometer 47 STEREO spacecraft 47 planet HD #b 47 distant galaxy clusters 47 Einstein relativity theory 47 Planck observatory 47 chondrules 47 AMIE camera 47 planet orbiting 47 Fornax cluster 47 orbiting Hubble Space Telescope 47 Laser Interferometer Gravitational Wave 47 Milky Way 47 occulted 47 Hale Bopp 47 icy moons 47 lunar topography 47 Enceladus 47 mantle plumes 47 cosmological observations 47 celestial objects 47 Deep Field HUDF 47 interstellar boundary 47 NASA ICESat 47 HD# [002] 47 constellation Ursa Major 47 supernova SN 47 exo planets 47 ringed planet 47 LIGO 47 airglow 47 polaritons 47 radar altimetry 47 interstellar cloud 47 baryonic 47 Corot 9b 47 Andromeda galaxy 47 Lunar Reconnaissance Orbiter 47 radiotelescope 47 relativity theory 47 planet Uranus 47 gamma ray photons 47 interacting galaxies 47 NASA Lunar Prospector 47 Doppler shifts 47 mineralogical composition 47 reflection nebula 47 tropospheric warming 47 foreground galaxy 47 circumstellar disk 47 celestial bodies 47 spectroscopic analysis 47 infrared spectrograph 47 meteorite bombardment 47 IBEX spacecraft 47 Kaguya 47 Reflection Radiometer 47 Bojowald 47 asteroid Vesta 47 ESO PR 47 Kuiper Belt object 47 LRO 47 STEREO mission 47 Earth Observation satellites 47 #gy 47 Werthimer 47 Avi Loeb 47 gamma ray telescopes 47 rocky extrasolar planet 47 Observatory SDO 47 TGFs 47 SN #C 47 spacecraft Cassini 47 rocky planets 47 Cassini spacecraft 47 Charon Pluto 47 UVES 47 Voorwerp 47 J# +# [002] 47 Area Telescope LAT 47 Galilean satellites 47 gravitational interactions 47 NEAs 47 IceCube 47 SOHO spacecraft 47 WHIM 47 GJ #b [002] 47 HARPS spectrograph attached 47 astrophysical objects 47 moon Mab 47 chemical abundances 47 binary asteroid 47 scanning tunneling microscopy 47 aurorae 47 X ray binary 47 Mojzsis 47 orbiting telescope 47 Sasselov 47 neutron star 47 Milky Way galaxy 47 binary quasar 47 Kepler Mission 47 GOCE 47 2MASS 47 field Infrared Survey 47 SEGUE 47 Comet Holmes 47 NASA twin STEREO 47 Gamma ray 47 MESSENGER 47 Extrasolar Planet Observation 47 dwarf galaxies 47 Kuiper belt object 47 orbiting Saturn 47 QCD 47 active galactic nucleus 47 BP Psc 47 planetary orbits 47 sulfur isotope 47 Milankovitch cycles 47 SDSS 47 Diviner instrument 47 e MERLIN 47 Gliese #g 47 HM Cancri 47 HiRISE image 47 circumstellar 47 antiparticle 47 proto galaxies 47 astrobiologists 47 Cassini ion 47 luminosities 47 Venusian atmosphere 47 Sky Survey SDSS 47 accretion disks 47 Fritz Zwicky 47 Small Magellanic Cloud 47 Comet #P/Holmes 47 CfA 47 cosmic 47 NASA Lunar Reconnaissance 47 Keck telescopes 47 X ray Telescope XRT 47 Spitzer infrared spectrograph 47 Webb Telescope 47 exoplanetary systems 47 transiting planet 47 Optical Gravitational Lensing Experiment 47 Yarkovsky effect 47 Cancri 47 cometary material 46 GLAST telescope 46 Herschel Space 46 proton proton collisions 46 planets orbits 46 Upsilon Andromedae 46 Omega Centauri 46 electron ion 46 cosmic rays 46 comet nuclei 46 terahertz THz 46 orbiting Mars 46 interferometric observations 46 dwarf spheroidal galaxies 46 Milky Way Galaxy 46 Magnetic Imager HMI 46 Multi Object Spectrograph 46 Active Galactic Nuclei 46 exoplanet hunter 46 Mars Phobos 46 elemental composition 46 arcseconds 46 SN #gy 46 Gamma Ray 46 Magnetars 46 coronal heating 46 OGLE TR 46 Bose Einstein 46 diffraction patterns 46 Astrophysics 46 Kazantzidis 46 Gravity Recovery 46 Hubble 46 Fermi Telescope 46 spectrograph 46 boson 46 astrophysicist 46 gamma ray spectrometer 46 periodic oscillations 46 dynamical evolution 46 pentaquark 46 Sagittarius B2 46 constellation Carina 46 elliptical galaxy NGC 46 diffraction 46 Monthly Notices 46 Toutatis 46 infrared spectra 46 Saturn auroras 46 Suzaku 46 physicists 46 planets orbiting sun 46 interstellar dust grains 46 HiRISE 46 infrared spectrometer 46 x ray scattering 46 Enceladus flybys 46 absorption spectra 46 GROND 46 spiral galaxy NGC 46 comets orbiting 46 Late Heavy Bombardment 46 cosmic cannibal 46 Neil Gehrels 46 ESA Mars 46 asteroidal 46 Bill Borucki Kepler 46 interferogram 46 hot Jupiters 46 LCLS 46 Doppler measurements 46 ESA Envisat satellite 46 accretion disk 46 relativistic proton dark 46 NASA QuikScat satellite 46 J#.# [001] 46 moons orbiting 46 NEAR Shoemaker 46 Caltech astronomer 46 Saturn Cassini 46 Deep Impact eXtended Investigation 46 Near Infrared Camera 46 NIRSpec 46 orbital angular momentum 46 Mars Reconnaissance Orbiter MRO 46 visit http:/saturn.jpl.nasa.gov 46 submillimetre 46 HiRISE images 46 GRACE satellites 46 TanDEM X 46 Svedhem 46 Dean Pesnell 46 CAIs 46 spacetime 46 X ray diffraction 46 SN #cr 46 photoluminescence 46 Bose Einstein condensate 46 infrared radiation 46 exosphere 46 SN #E 46 proton antiproton collisions 46 Perseus cluster 46 Type 1a supernovae 46 antineutrino 46 auroral activity 46 CALIPSO 46 HUDF# 46 Microlensing 46 quantum theory 46 coronagraph 46 faraway galaxies 46 infrared telescope 46 fundamental constants 46 infall 46 anisotropy 46 baryon 46 Andromeda Galaxy 46 smallest exoplanet 46 Very Large Telescope 46 astrophysics 46 neutrino detectors 46 PSR J# 46 planets asteroids 46 planetary nebula 46 MPG ESO 46 muon neutrino 46 SPIRE instrument 46 gamma ray 46 Cloud Aerosol Lidar 46 muon neutrinos 46 gamma rays emitted 46 MicroFUN 46 Gondolo 46 XENON# [002] 46 inelastic scattering 46 spherically symmetric 46 barred spiral galaxy 46 Raman spectra 46 ultraviolet wavelengths 46 Earthlike 46 comet Wild 46 galactic mergers 46 Helix nebula 46 HRSC 46 sunlike stars 46 Andromeda halo 46 Kuiper belt 46 AAVSO 46 cosmologist 46 SMBHs 46 coronal loops 46 NASA LCROSS 46 helium atoms 46 transiting exoplanet 46 Stephan Quintet 46 particle colliders 46 ultracold atoms 46 LRO spacecraft 46 Observatoire de Paris 46 Spitzer infrared 46 Pluto Charon 46 Landsat satellite 46 occultation 46 asteroid Eros 46 SNe 46 THEMIS mission 46 Comet 9P/Tempel 1 46 Comet Machholz 46 Relations Observatory STEREO 46 giant elliptical galaxy 46 NASA Hubble Space 45 Tropical Rainfall Measuring 45 Haumea 45 gravitational wobbles 45 Observatory STEREO 45 infrared imager 45 Hubble Space Telescopes 45 Solar System 45 sparticles 45 Infrared Pathfinder Satellite 45 radioactive decay 45 RHIC 45 GeV 45 Eagle Nebula 45 Solar Terrestrial Relations 45 phyllosilicates 45 Spitzer infrared telescope 45 cosmic ray astronomy 45 retrograde orbit 45 Butterfly Nebula 45 radiometer 45 atmospheric aerosols 45 cosmology 45 magnetosphere 45 X ray spectra 45 UCO Lick 45 NSLS 45 Saul Perlmutter 45 rotational axis 45 Arecibo Observatory 45 elliptical orbits 45 cosmic magnifying glass 45 infrared ultraviolet 45 Landsat satellites 45 Infrared Mapping Spectrometer VIMS 45 Saturn moon 45 NASA Cassini orbiter 45 reionization epoch 45 planet Gliese #g 45 #P/Churyumov-Gerasimenko 45 fermionic 45 Magellanic Clouds 45 Cassini ultraviolet 45 Global Surveyor 45 Cosmic Origins Spectrograph COS 45 Surveys ACS 45 carbonaceous chondrites 45 Extragalactic 45 comet McNaught 45 Kepler spacecraft 45 Antenna LISA 45 Quaoar 45 celestial object 45 STIS 45 de Pater 45 NASA Aqua 45 Synthetic Aperture Radar 45 nebula 45 sodium atoms 45 planets circling 45 missing baryons