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(Click for frequent words.) 63 Astrophysics CfA 62 Astrophysics Cambridge Mass. 60 CfA 56 Smithsonian astronomer 54 HD#b 54 Astrophysics 53 quasars 52 elliptical galaxies 52 galaxies 51 Carnegie Observatories 51 Caltech astronomer 51 GRBs 51 astronomer 51 galaxy clusters 50 distant galaxy 50 planetary scientist 50 active galactic nuclei 50 Milky Way galaxy 50 Space Telescope Science 49 astrophysical 49 Smithsonian Astrophysical Observatory 49 brown dwarf 49 Filippenko 49 rocky planets 49 Astrophysical Journal 49 galaxy cluster 49 NASA Chandra 49 supermassive black holes 49 X ray emission 48 distant galaxies 48 planet HD #b 48 pulsar 48 supermassive black hole 48 planetary astronomer 48 supernovae 48 UA Lunar 48 XMM Newton 48 extrasolar 48 Gemini Observatory 48 gaseous planet 47 Keck Observatory 47 Milky Way 47 Alex Filippenko 47 NASA Goddard Space 47 gamma ray burst 47 orbiting Chandra 47 neutron star 47 Type Ia supernovae 47 astrophysicist 47 astronomers 47 spectroscopic 47 Extraterrestrial Physics 47 Andromeda galaxy 47 quasar 47 exoplanets 46 supernova 46 WM Keck Observatory 46 habitable planets 46 MIT planetary scientist 46 Mauna Kea Hawaii 46 X ray telescopes 46 planetary geologist 46 brown dwarfs 46 HD #b [002] 46 SN #A 46 Goddard Space Flight 46 ESO VLT 46 extrasolar planets 46 Sara Seager 46 planet orbiting 46 Milky Way Galaxy 46 Earthlike planets 46 starburst galaxy 46 MGH Cancer 46 CU Boulder Laboratory 46 Virgo cluster 46 astrophysicists 46 protoplanetary disks 46 exoplanets orbiting 46 Wolfgang Brandner 46 Meteoritics 46 neutron stars 46 Astrophysical Journal Letters 46 colliding galaxies 46 exoplanet 46 supernovas 46 NASA Goddard Spaceflight 46 Cancri e 46 Drake Deming 46 cosmological distances 46 Lick Observatory 46 X ray wavelengths 46 Cassini ion 45 supernova explosion 45 aurorae 45 Galaxy Evolution 45 gravitationally bound 45 planets 45 Niels Bohr Institute 45 dwarf galaxies 45 Spitzer Space Telescope 45 terrestrial planets 45 STScI 45 gravitational lensing 45 WASP #b 45 Vikhlinin 45 foreground galaxy 45 National Optical Astronomy 45 Nikku Madhusudhan 45 distant supernovae 45 exoplanetary 45 journal Icarus 45 Dark Cosmology 45 microlensing 45 Virgo Cluster 45 Haystack Observatory 45 axion 45 Omega Centauri 45 Astrophysical 45 Gravitational lensing 45 PSR B# +# 45 gravitational microlensing 45 Lyman alpha 45 Pieter van Dokkum 45 TrES 4 45 Astrophysical Institute 45 X ray Observatory 45 #gy 45 MIT Haystack Observatory 45 SN #gy 45 Rychard Bouwens 45 Nasa Jet Propulsion 44 Manchester Jodrell Bank 44 Saturn rings 44 ESA XMM Newton 44 redshift 44 Chandra X ray 44 Astrophysics MOA 44 Corot 7b 44 Reentry Debris Studies 44 RXTE 44 Helix nebula 44 millisecond pulsar 44 High Altitude Observatory 44 interstellar dust clouds 44 Hubble observations 44 supernova explosions 44 NASA Jet Propulsion Laboratory 44 Woods Hole Oceanographic 44 Wolszczan 44 elliptical galaxy 44 NASA Goddard 44 Brookhaven physicist 44 extrasolar planetary systems 44 magnetar 44 accretion disk 44 Cassini ultraviolet 44 Planetary Laboratory 44 Coma Cluster 44 Eta Carinae 44 RHESSI 44 spectroscopic observations 44 Type Ia supernova 44 Max Planck Institute 44 Guhathakurta 44 cosmic microwave background 44 Kawaler 44 DEEP2 44 galaxy 44 Mandushev 44 potentially habitable planets 44 planets orbiting 44 CU Boulder Cooperative 44 SPACE.com 44 fainter objects 44 KIPAC 44 Cassini scientist 44 Laser Interferometer Gravitational Wave 44 Lars Hernquist 44 type Ia supernovae 44 Epsilon Eridani 44 periodic dimming 44 Harvard Smithsonian CfA 44 Muchachos Observatory 44 Lowell Observatory 44 Red Rectangle 44 SDSS II 44 RX J# 44 globular cluster 44 Particle Astrophysics 44 Kepler Mission 43 Infrared Thermal Imaging Spectrometer 43 Comet Hale Bopp 43 Keck Interferometer 43 Richard Mushotzky 43 NASA Infrared Telescope 43 Upsilon Andromedae 43 extragalactic 43 gamma ray observatory 43 GJ#b 43 gravitational wave 43 Observatoire de Paris 43 Astrophysicist 43 NASA Ames 43 Grillmair 43 JILA 43 Harvard Smithsonian Astrophysical 43 comets 43 Gravitational waves 43 planetary astronomy 43 GJ #b [002] 43 RS Ophiuchi 43 galactic cosmic rays 43 AGNs 43 MINOS 43 GALEX 43 JPL 43 dwarf galaxy 43 gravitational waves 43 Climatic Research 43 faint galaxies 43 Richard Binzel 43 planetary 43 Giovanni Fazio 43 constellation Pegasus 43 Avishay Gal Yam 43 gamma ray bursts 43 Jenniskens 43 star Gliese 43 weak gravitational lensing 43 luminous galaxies 43 postdoctoral fellow 43 Very Large Array 43 exo planet 43 Fermi LAT 43 red supergiants 43 principal investigator 43 comet nucleus 43 NRAO 43 constellation Libra 43 Tod Strohmayer 43 CoRoT 9b 43 Fomalhaut b 43 constellation Vulpecula 43 van Dokkum 43 redshifts 43 Adaptive Optics 43 starburst galaxies 43 Micro Photonics 43 eclipsing binary 43 constellation Sagittarius 43 Peter Capak 43 Corot 9b 43 noctilucent clouds 43 Planetary Science Institute 43 Astrophysicists 43 X ray binary 43 blazars 43 Storrie Lombardi 43 Infrared Array Camera 42 postdoctoral associate 42 Henize #-# 42 supermassive 42 radial velocity 42 HUDF 42 Kuiper Belt Objects 42 NOAO 42 astronomical objects 42 ESA Integral 42 planet orbits 42 Gliese #c 42 Cassini imaging 42 SSRL 42 intrinsic brightness 42 Kavli Institute 42 nebula 42 protoplanet 42 journal Meteoritics 42 icy moons 42 Rainer Klement 42 type 1a supernovae 42 Beta Pictoris 42 protostar 42 gamma rays 42 supernova remnant 42 SN#A 42 JILA joint 42 astrometry 42 Michael Zolensky 42 Dimitar Sasselov 42 Kusenko 42 Steward Observatory 42 Spectrograph 42 distant quasar 42 Kuiper Belt object 42 AU Mic 42 neutrino 42 Planetary Studies 42 supernova remnant Cassiopeia 42 interstellar cloud 42 Sasselov 42 merging galaxies 42 Stephan Quintet 42 Cassini magnetometer 42 GJ #b [001] 42 National Astronomical Observatory 42 galaxy NGC 42 galaxy M# [002] 42 neutral mass spectrometer 42 Hawking radiation 42 super Earths 42 MG J# +# 42 Earth asteroids 42 Orion nebula 42 Evolution Explorer 42 PSR J# 42 optical telescopes 42 stellar occultation 42 Keck telescope 42 Wilkinson Microwave Anisotropy Probe 42 moons orbiting 42 sunlike star 42 distant quasars 42 Konacki 42 metallicity 42 Higgs bosons 42 constellation Carina 42 UA Steward Observatory 42 High Angular Resolution 42 visit http:/saturn.jpl.nasa.gov 42 MPIfR 42 WMAP 42 Kailash Sahu 42 Bug Nebula 42 Bruce Jakosky 42 Ring Nebula 42 HD #b [001] 42 IBM Almaden Research 42 Adam Riess 42 postdoctoral researcher 41 spiral galaxy 41 atmospheric scientist 41 red supergiant 41 magnetospheric imaging instrument 41 lensing galaxy 41 reionization 41 Saul Perlmutter 41 interstellar clouds 41 Mullard Space Science 41 nebulae 41 Theoretical physicist 41 Caspar Ammann 41 stellar nurseries 41 climate modeler 41 constellation Hercules 41 magnetars 41 Daniel Patnaude 41 star Fomalhaut 41 Charles Beichman 41 Jonathan Lunine 41 rocky extrasolar planet 41 Trifid Nebula 41 supernova remnants 41 NASA astrophysicist 41 occulted 41 exoplanet hunter 41 radial velocity technique 41 Dauphas 41 Io Europa 41 Avi Loeb 41 auroras 41 Nasa Ames 41 Kuiper belt objects 41 globular clusters 41 Transplantation Biology 41 particle detectors 41 Exoplanets 41 SINFONI 41 Stanford Linear Accelerator 41 Georgi Mandushev 41 Cassini radar 41 Gemini Telescope 41 gravitational radiation 41 theoretical astrophysicist 41 EPOCh 41 sized planets orbiting 41 Atmospheric Research 41 Solar TErrestrial RElations Observatory 41 Neil Gehrels 41 Gnedin 41 Carey Lisse 41 SN #ha 41 planets orbiting distant 41 Optical Gravitational Lensing Experiment 41 Arches Cluster 41 Xavier Bonfils 41 Orion Nebula 41 Gamma ray bursts 41 constellation Lyra 41 Hans Deeg 41 GRB #B 41 Jet Propulsion Laboratory 41 David Spergel 41 multiband imaging photometer 41 Fermi telescope 41 sunlike stars 41 X ray observatory 41 planets comets 41 moonlets 41 extrasolar planet 41 Gliese #d 41 Space.com 41 NASA Astrobiology Institute 41 de Pater 41 planetary Transits 41 Planetary scientist 41 optical wavelengths 41 Glaciologist 41 Southern Observatory ESO 41 nicknamed Xena 41 Anisotropy Probe WMAP 41 protoplanetary disk 41 Weather Prediction 41 celestial object 41 Palomar Observatory 41 Electorate Nominating Committee 41 orbiting 41 Astronomy 41 Pasachoff 41 galaxy formation 41 SNfactory 41 planets circling 41 infrared telescope 41 transiting planets 41 Cosmology 41 CIRES 41 brightest supernova 41 R Coronae Borealis 41 spiral galaxies 41 Lunar Reconnaissance Orbiter Camera 41 LSST 41 neutrinos 41 LLNL 41 X ray binaries 41 Cosmic Evolution 41 double helix nebula 41 Harlow Shapley 41 gravitational lens 41 cosmic rays 41 ultraluminous galaxy 41 Terrestrial Magnetism 41 pulsars 41 Comet Machholz 41 Uranus Neptune 41 Gaensler 41 MIT Kavli Institute 41 stellar occultations 41 supergiant star 41 volcanic moon Io 41 Paranal Chile 41 GIND 41 exoplanet orbiting 41 protoplanetary 40 Kuiper belt 40 Cepheids 40 Cancri 40 VY Canis Majoris 40 Halton Arp 40 Herschel Space 40 asteroid 40 astrobiology scientist 40 Anne Verbiscer 40 LCROSS 40 particle colliders 40 accretion disks 40 Gal Yam 40 Saturn moons 40 gravitationally lensed 40 Tarantula Nebula 40 galaxy M# [001] 40 Alaska Fairbanks Geophysical 40 LOFAR 40 gamma ray emission 40 brightnesses 40 ESA Herschel 40 Brookhaven chemist 40 NASA Jet Propulsion 40 Jet Propulsion Laboratory JPL 40 magnetosphere 40 Gerard Kuiper 40 Hawaiian Volcano Observatory 40 galactic 40 RRATs 40 AB Aurigae 40 Einstein equations 40 Great Observatories 40 NASA Fermi Gamma 40 Gondolo 40 Keck Telescope 40 Fermi Gamma ray 40 Nasa Goddard Space 40 Quaoar 40 journal Geophysical Research 40 Shri Kulkarni 40 antiparticle 40 Herzberg Institute 40 Jakosky 40 Japan NAOJ 40 Crab Nebula 40 BP Psc 40 Astronomer 40 Meenakshi Wadhwa 40 novas 40 cosmic magnifying glass 40 Submillimeter Array 40 X ray pulses 40 moon Ganymede 40 constellation Cassiopeia 40 cosmic microwave radiation 40 infall 40 Gliese #g 40 NIST physicist 40 Anthony Remijan 40 NCAR scientist 40 Rensselaer Nanotechnology 40 Astromaterials Research 40 Kepler 9c 40 habitable zones 40 Leonids 40 globulars 40 hot Jupiters 40 Comet Holmes 40 Oort Cloud 40 planet gravitational tug 40 HARPS instrument 40 Hot Jupiters 40 Pascale Ehrenfreund 40 solar flares 40 Jack Lissauer 40 Milky Way halo 40 muon neutrino 40 Type 1a supernovae 40 Advanced Remote Sensing 40 Peter Jenniskens 40 Wide Angle Search 40 Beta Pictoris b 40 Jamie Elsila 40 Son Nghiem 40 RS Oph 40 infrared wavelengths 40 ionized gas 40 NASA Wilkinson Microwave 40 PhD postdoctoral fellow 40 NASA Far Ultraviolet 40 Einstein theory 40 Wistar Institute Vaccine 40 millisecond pulsars 40 FORCAST 40 Chicxulub 40 Kuchner 40 NASA astrobiologist 40 Gliese #e 40 Betelgeuse 40 Microlensing 40 spiral nebulae 40 infalling 40 planemos 40 Solar System 40 Mary Voytek 40 told physicsworld.com 40 VB #b 40 Cassini Imaging 40 star Beta Pictoris 40 ESO Very Large Telescope 40 earthshine 39 spacetime 39 Lunine 39 planetary nebulas 39 Hubble astronomer 39 Triangulum Galaxy 39 HARPS spectrograph attached 39 PASADENA Calif. Astronomers 39 GFZ German 39 inhabitable planets 39 Crab Pulsar 39 theoretical cosmologist 39 solar nebula 39 OGLE TR #b 39 Spaceweather.com 39 Andrea Ghez 39 NASA WMAP 39 Translational Neuroimaging 39 adaptive optics 39 Infrared Pathfinder Satellite 39 Andromeda Galaxy 39 retrograde orbit 39 NASA Lunar Reconnaissance 39 constellation Centaurus 39 Leiden Observatory 39 climate modeller 39 Radioastronomy 39 astrobiologist 39 orbiting gamma ray 39 star Proxima Centauri 39 telescopes 39 Integrated Nanotechnologies 39 Space Telescope 39 sterile neutrino 39 afterglows 39 Ecological Analysis 39 astrophysics 39 SDSS III 39 transiting planet 39 quark gluon plasma 39 Ari Melnick 39 Frank Bertoldi 39 Thiemens 39 Cygnus X 39 Franck Marchis 39 P/# A2 39 behavioral neuroscientist 39 asteroids 39 http:/arxiv.org/abs/#.# 39 National Drought Mitigation 39 Bette Otto Bliesner 39 barred spiral galaxy 39 theoretical physicist 39 V# Mon 39 GQ Lupi 39 Radio Astronomy Observatory 39 HD# [002] 39 infrared spectrograph 39 BLG #Lb 39 circumstellar disks 39 Compact Reconnaissance Imaging Spectrometer 39 general relativity 39 Planetology 39 transiting exoplanets 39 Bruce Wielicki 39 Jülich Research 39 cosmic 39 SN #C 39 accreting 39 spherical halo 39 optical spectra 39 planetary science 39 USGS geologist 39 journal Astronomy 39 Upsilon Andromedae b 39 smallest extrasolar planet 39 Planetary Science 39 filamentary structure 39 NASA astrobiology 39 Proxima Centauri 39 HiRISE camera aboard 39 William Bottke 39 transiting exoplanet 39 comet 39 Nima Arkani Hamed 39 circumstellar 39 XMM Newton observations 39 Komossa 39 Comet Hartley 2 39 Gehrels 39 UDFy # 39 Mount Stromlo Observatory 39 elliptical galaxy NGC 39 Observatory astronomer 39 WMAP satellite 39 Dan Buhl Planetarium 39 largest moon Charon 39 ATLAS detector 39 Anisotropy Probe 39 detect neutrinos 39 retrograde orbits 39 magma ocean 39 Descent Imager Spectral Radiometer 39 CoRoT 7b 39 KH #D 39 reflection nebula 39 Single Molecule Biophysics 39 planetary nebulae 39 mu Arae 39 Perseus Cluster 39 UKIRT 39 interferometry 39 particle acceleration 39 Geminids 39 muon neutrinos 39 Fornax cluster 39 KBOs 39 hypervelocity stars 39 blue supergiant 39 Sedna 39 Hubble Near Infrared 39 Katlenburg Lindau Germany 39 BP Piscium 39 Giovanna Tinetti 39 X ray observatories 39 ATLAS experiment 39 moons 39 Makiko Sato 39 Southeastern Tropical 39 proplyds 39 Kazantzidis 39 supersymmetric particles 39 atmospheric chemist 39 EPOXI 39 constellation Aquarius 39 globular star 39 Gruss Lipper Biophotonics 39 cosmic cannibal 39 Einstein relativity theory 39 blazar 39 Very Large Telescope 39 Deep Impact Principal Investigator 39 WIYN 39 ejecta 39 novae 39 Earths orbiting 39 Stan Woosley 39 Comet #P 39 astrophysical phenomena 39 postdoctoral scholar 39 submillimeter wavelengths 39 type Ia supernova 39 Saturnian moon 39 G#.# +#.# 39 cosmologists 39 VLTI 39 observable universe 39 dynamical 39 faraway galaxies 39 Gliese 39 geochemist 39 Imke de 39 VIRTIS 39 Jupiter moon Io 39 Sromovsky 39 Carnegie Institution Geophysical 39 Bad Astronomy 39 Lead researcher 39 supergiant stars 39 Max Planck Institut fur 39 Stanford Synchrotron Radiation Lightsource 39 ray Space Telescope 39 detect gravitational waves 39 Pan STARRS 39 Earth Object 39 moon Mab 39 protostars 39 Instituto de Astrofisica de 39 auroral emissions 39 Telescope BAT 39 THEMIS 39 ESO PR 39 Eran Segal 39 protons collide 39 Greenbelt Maryland 39 antineutrinos 39 Dikpati 38 MMT Observatory 38 moonlet 38 silicon monoxide 38 MESSENGER MErcury Surface 38 Scripps Oceanography 38 ESRL 38 Maria Zuber 38 constellation Virgo 38 Saturn magnetosphere 38 permanently shadowed craters 38 Hanny Voorwerp 38 dwarf planets 38 meridional flow 38 Space Physics 38 intracluster 38 GRB# 38 occultations 38 Supernovae 38 extrasolar planets orbiting 38 USGS Cascades Volcano 38 cluster NGC 38 Helioseismic 38 Astrophysical Research 38 STEREO mission 38 Wolf Rayet star 38 supersymmetry 38 Jupiter moons 38 Min Gu 38 YORP effect 38 Cygnus Lyra region 38 gravitational interactions 38 Composite Infrared Spectrometer 38 exo planets 38 Habitable Worlds 38 NSIDC 38 Herschel telescope 38 sun corona 38 Natalie Batalha 38 alpha particles 38 Cepheid variables 38 Perseids 38 astronomical observations 38 SwRI Space 38 magnetospheric 38 CoRoT #b 38 Andromeda Galaxy M# 38 Ultracold Atoms 38 Gravitational Physics 38 COROT 38 neutron spectrometer 38 maser 38 galactic mergers 38 electron neutrinos 38 Diviner instrument 38 Near Infrared Camera 38 VIRTIS instrument 38 gravity warps 38 proto cluster 38 TGFs 38 Armagh Observatory 38 Magellanic Clouds 38 meteoroid 38 Neptune Uranus 38 chemical abundances 38 comet Lulin 38 Trojan asteroids 38 WHIM 38 SNR #-#.# 38 Rolf Kudritzki 38 zodiacal dust 38 Saturnian moons 38 Inez Fung 38 plant physiologist 38 UVOT 38 University Lamont Doherty 38 Bose Einstein condensate 38 Keck telescopes 38 Henry Bortman 38 Solar Terrestrial Relations 38 RHIC 38 asteroids orbiting 38 LROC 38 Kuiper belt object 38 Cosmic Microwave Background 38 George Djorgovski 38 Cassini interdisciplinary 38 X ray afterglow 38 SOHO spacecraft 38 GeV 38 LIGO 38 Zeta Ophiuchi 38 NOAA Climate Prediction 38 Observatory NOAO 38 faintest galaxies 38 Max Plank 38 constellation Cetus 38 spectroscopically 38 Kepler telescope 38 Roukes 38 tholins 38 gamma rays emitted 38 infrared interferometry 38 gamma ray flares 38 Kepler #b 38 superfluidity 38 Rashid Sunyaev 38 Puppis 38 Bill Borucki Kepler 38 supercomputer simulations 38 polar vortex 38 orbits Saturn 38 Orionids 38 Galilean moons 38 Carolyn Porco 38 Bottke 38 planet Gliese #g 38 trans Neptunian objects 38 constellation Ursa Major 38 extrasolar planetary 38 NASA Great Observatories 38 theoretical particle 38 moons circling 38 particle physicist 38 LHCb 38 Nansen Environmental 38 cosmic ray 38 neutrino oscillation 38 Siding Spring 38 WHOI 38 Goldilocks planet 38 Cognitive Brain 38 NASA STEREO 38 luminosities 38 Earthlike planet 38 ESO astronomer 38 Monthly Notices 38 interstellar dust 38 X ray telescope 38 Goddard Space 38 Large Magellanic Cloud 38 Cenko 38 cosmic dust 38 Nanophase Materials Sciences 38 submillimeter galaxies 38 Johny Setiawan 38 Sky Survey SDSS 38 Cristina Chiappini 38 Powell Gene Therapy 38 Carina constellation 38 Epsilon Aurigae 38 NOAA ESRL 38 Neuroinflammation Research 38 Enric Palle 38 Saturn Enceladus 38 Syrtis Major 38 geological sciences 38 Nanoscale Materials 38 La Silla Chile 38 Saturn auroras 38 JPL manages 38 XTE J# 38 Seismologist 38 Cat Paw Nebula 38 Astrobiology 38 Muons 38 WISE telescope 38 Peony nebula star 38 Spacewatch 38 highly elliptical orbits 38 Whipple Observatory 38 neutralino 38 GKSS Research 38 protoplanets 38 Higgs particle 38 supermoon 37 Ketterle 37 Cascades Volcano Observatory 37 occultation 37 shorter wavelengths 37 NASA GSFC 37 DZero 37 SETI Search 37 geoneutrinos 37 antiparticles 37 CloudSat 37 inch Samuel Oschin 37 emits X rays 37 JWST 37 SEGUE 37 relativistic particles 37 HiRISE image 37 spiral galaxy NGC 37 comet McNaught 37 Cassini Ion 37 moons Phobos 37 Gregory Asner 37 spinning neutron 37 Mimas 37 particle detector 37 interacting galaxies 37 Isabella Velicogna 37 Carina Nebula 37 NuSTAR 37 Gemini telescopes 37 globular cluster M# 37 Extrasolar planets 37 Area Telescope LAT 37 hadron 37 Magnetic Imager HMI 37 infrared mapping spectrometer 37 Meteorite Studies 37 Pluto Eris 37 planet transits 37 Mamajek 37 cosmological parameters 37 NOAO AURA NSF 37 Small Magellanic Cloud 37 Type 1a supernova 37 HIV AIDS Vaccine Immunology 37 baryonic 37 Laboratory Pasadena 37 neutralinos 37 Helix Nebula 37 Royal Astronomical Society 37 unaided eye 37 ARPES 37 Type Ia 37 Owen Gingerich 37 Venusian atmosphere 37 Charon Pluto 37 cosmological theories 37 imaging spectrometer 37 Susan Jick 37 Space Infrared Telescope 37 microlensing events 37 superdense 37 infrared astronomy 37 Nasa Kepler