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(Click for frequent words.) 71 arcseconds 69 luminosities 69 arcsec 68 redshift 68 arcminutes 67 J# +# [002] 67 constellation Centaurus 67 spiral galaxy NGC 66 redshifts 66 GeV 66 SNe Ia 66 X ray pulses 65 kpc 65 eclipsing binary 65 galaxy NGC 65 submillimetre wavelengths 65 z = 65 arcsecond 65 distant quasar 65 star Gliese 65 photometry 65 starburst galaxy 64 luminous galaxies 64 cm -1 64 supernova SN 64 solar radii 64 constellation Cassiopeia 64 Comet Holmes 64 OGLE TR 63 keV 63 Lagoon Nebula 63 constellation Aquarius 63 galaxy cluster 63 Virgo cluster 63 velocity dispersion 63 Virgo Cluster 63 giant elliptical galaxy 63 GALEX 63 constellation Carina 63 redshifted 63 cm -2 63 arcmin 63 J#.# [001] 63 meV 62 galaxy M# [002] 62 constellation Cepheus 62 ESO VLT 62 barred spiral galaxy 62 constellation Virgo 62 supergiant star 62 intrinsic brightness 62 X ray binary 62 ESO PR 62 constellation Andromeda 62 z ~ 62 Coma Cluster 62 microquasar 62 GRB# 62 Fomalhaut b 62 Carinae 62 redshift z = 62 AU Mic 62 Fornax cluster 61 constellation Eridanus 61 mT 61 galaxy M# [001] 61 infrared wavelength 61 gamma ray emission 61 Å -1 61 elliptical galaxy 61 X ray emission 61 gravitationally lensed 61 Eridani 61 cluster NGC 61 constellation Cetus 61 FWHM 61 CoRoT 61 Cepheid variables 61 galactic disk 61 constellation Ursa Major 61 visible wavelengths 61 Crab Nebula 61 TrES 61 Sagittarius B2 61 X ray wavelengths 61 AGNs 61 star Proxima Centauri 61 Fermi telescope 60 constellation Aries 60 Earth radii 60 #.#nm [002] 60 SN #A 60 Hubble Constant 60 electronvolts 60 metallicity 60 Astronomical Units 60 starburst galaxies 60 VLT telescope 60 m z 60 GRB # 60 infrared wavelengths 60 TrES 4 60 Epsilon Aurigae 60 Triangulum Galaxy 60 Corot 9b 60 GRB #B 60 Bug Nebula 60 Pegasi 60 cm -3 60 baryon acoustic oscillations 60 Comet Halley 60 supernova remnant 60 moonlet 60 blazar 60 SMM J# 60 VLBA 60 Comet Hartley 60 ESO telescope 60 GJ#b 60 XTE J# 60 optical wavelengths 60 faint galaxies 60 SDSS II 59 jovian 59 S/# [001] 59 baryon 59 brightnesses 59 GQ Lupi 59 Orion Nebula 59 Milky Way halo 59 reflection nebula 59 red supergiant 59 Proxima Centauri 59 τ 59 spectroscopic observations 59 kelvin 59 emission nebula 59 WASP #b 59 Andromeda Galaxy M# 59 Upsilon Andromedae 59 Spectrograph 59 ULIRGs 59 submillimeter wavelengths 59 VLTI 59 galaxy redshift 59 MeV 59 starlike object 59 orbital resonance 59 CoRoT #b 59 Wilkinson Microwave Probe 59 Scorpii 59 HARPS spectrograph attached 59 constellation Cygnus 59 photon energies 59 constellation Pegasus 59 Andromeda Galaxy 59 distant galaxy 59 distant quasars 59 constellation Sagittarius 59 Active Galactic Nuclei 59 interacting galaxies 59 NASA Wilkinson Microwave 59 submillimetre 59 gravitational acceleration 59 Ulysses spacecraft 59 HAT P 59 CoRoT 7b 59 baryonic 58 μm wavelength 58 Serpens Cauda 58 #mV V 58 ° N 58 filamentary structure 58 Epsilon Eridani 58 photoemission 58 HD#b 58 RY Sagittarii 58 XMM Newton 58 Syrtis Major 58 constellation Taurus 58 Milky Way Galaxy 58 Andromeda galaxy 58 X ray afterglow 58 star Spica 58 orbital eccentricity 58 Fig. 2A 58 Hubble observations 58 nT 58 Large Magellanic Cloud 58 celestial equator 58 perihelion 58 cosmological distances 58 foreground galaxy 58 neutrino mass 58 Encke gap 58 type Ia supernovae 58 extragalactic 58 P/# A2 58 GRBs 58 Mauna Kea Hawaii 58 Dumbbell Nebula 58 HD #b [002] 58 ms -1 58 distant supernovae 58 RS Ophiuchi 58 aperture telescope 58 Hipparcos 58 constellation Monoceros 58 HD# [002] 58 Unit Telescopes 58 COROT 58 spiral galaxy 58 SNR #-#.# 58 cosmic ray flux 58 planet orbits 58 submillimeter 58 active galactic nucleus 58 umbral 58 absorption spectra 58 Epsilon Indi 58 Cancri e 58 globular cluster M# 58 Lyman alpha 58 reionization 58 Cepheids 58 occultations 57 NEAs 57 spectroscopic measurements 57 Comet Hartley 2 57 millisecond pulsar 57 constellation Hercules 57 gravitational redshift 57 2nm 57 optical spectra 57 celestial sphere 57 Pleiades cluster 57 spectroscopically 57 dipole moment 57 observable universe 57 Type Ia supernova 57 IR wavelengths 57 planetary nebula 57 Helix Nebula 57 #.#nm [001] 57 Pinwheel Galaxy 57 Submillimeter Array 57 wavelength infrared 57 Small Magellanic Cloud 57 aphelion 57 blazars 57 globular cluster 57 exoplanet orbiting 57 solar corona 57 MG J# +# 57 auroral 57 constellation Auriga 57 Doradus 57 Trifid Nebula 57 electron volt 57 Cygnus X 57 parsec 57 PKS #-# 57 micron wavelengths 57 Cygni 57 gamma ray burst GRB 57 Red Rectangle 57 RX J# 57 micron wavelength 57 Delta Cephei 57 spectra 57 X ray telescopes 57 Supplementary Table 57 Mimas 57 constellation Serpens 57 multiwavelength 57 Cosmic Evolution 57 BLG #L 57 ESA XMM Newton 57 Cat Paw Nebula 57 blackbody 57 ° latitude 57 Aurigae 57 constellation Coma Berenices 57 NICMOS 57 linewidth 57 Beta Pictoris 57 δ 57 kcal mol 57 Kuiper belt objects 57 amplitudes 57 Saturnian 57 attoseconds 57 Fig. 1b 57 Convection Rotation 56 magnetotail 56 millimeter wavelengths 56 HIRES spectrometer 56 spiral nebulae 56 planetary nebulae 56 Beehive Cluster 56 diffraction pattern 56 Henize #-# 56 CMB radiation 56 blue supergiant 56 periodicities 56 Seyfert galaxies 56 constellation Scorpius 56 Myr 56 airglow 56 CoRoT satellite 56 cd m 56 nm spectral 56 ESA SMART 56 anisotropy 56 polarimetry 56 Betelgeuse 56 exoplanets orbiting 56 gamma ray burst 56 Cancri 56 2MASS 56 BLG #Lb 56 HII regions 56 1nm 56 RRATs 56 radial velocity 56 Rosette Nebula 56 spectral characteristics 56 Ring Nebula 56 Eta Carinae 56 gaseous planet 56 elliptical galaxy NGC 56 Tarantula Nebula 56 atmospheric opacity 56 constellation Puppis 56 interferogram 56 Supplementary Fig 56 Keck Telescope 56 dI dV 56 Coma cluster 56 gravitational interaction 56 lunar highlands 56 RXTE 56 globulars 56 equatorial orbit 56 orbits 56 gamma ray flares 56 Gliese #e 56 cm ^ sup 56 stellar occultations 56 high redshift galaxies 56 SINFONI 56 chromosphere 56 HM Cancri 56 supergiant stars 56 Mössbauer 56 candelas per 56 ε 56 #nm #nm [001] 56 zodiac constellations 56 Bullet Cluster 56 Veil Nebula 56 FUV 56 Eagle Nebula 56 G#.# +#.# 56 azimuthal 56 σ 56 Puppis 56 constellation Libra 56 spectral 56 Toutatis 56 absorption coefficient 56 EVLA 56 constellation Bootes 56 Kepler #b 56 interferometric 56 wavefront distortion 56 #cm [001] 55 Triangulum 55 comet nucleus 55 Astrophysical 55 Fig. 1A 55 Quaoar 55 Spitzer IRAC 55 Doppler shifts 55 linearly polarized 55 active galactic nuclei 55 slender crescent 55 galaxy clusters 55 exoplanetary 55 obscuration 55 nucleon 55 Muchachos Observatory 55 PSR J# 55 Anisotropy Probe WMAP 55 X ray binaries 55 KBOs 55 photosphere 55 ray Space Telescope 55 lensing galaxy 55 Keck Interferometer 55 baryons 55 Tarantula nebula 55 Perseus cluster 55 yr -1 55 millimeter wavelength 55 La Silla Chile 55 Magellanic Stream 55 collimated 55 diffraction patterns 55 Nd 55 PSR B# 55 Fig. 1a 55 Arabia Terra 55 picometers 55 Orionis 55 Planck satellite 55 astrophysical objects 55 Kepler 9c 55 constellation Vulpecula 55 radiometry 55 quasar 55 X ray observatory 55 quasars 55 WMAP satellite 55 fainter objects 55 sized planets orbiting 55 APEX telescope 55 star Fomalhaut 55 femtoseconds 55 Zeta Ophiuchi 55 Quadrantid meteor shower 55 nebular 55 electron density 55 Omega Centauri 55 θ 55 AUs 55 mu m 55 VY Canis Majoris 55 moon Mimas 55 GJ #b [002] 55 spectral bands 55 photoluminescence 55 transiting planet 55 interferometers 55 ultraviolet wavelengths 55 Kuiper belt 55 YU# 55 Doppler shift 55 AB Aurigae 55 comets orbiting 55 Titan flyby 55 Wolf Rayet stars 55 ecliptic plane 55 Saturnian moon 55 Anisotropy Probe 55 Comet Lulin 55 retrograde orbits 55 gamma ray observatory 55 mrad 55 retrograde orbit 55 microlensing events 55 constellation Hydra 55 dwarf galaxy 55 Jupiter moon Io 55 infrared imager 55 occulted 55 LAGEOS 55 irradiance 55 spiral galaxy Messier 55 transiting planets 55 heliosheath 55 extrasolar 55 Virginis 55 ν 55 Monoceros 55 parsecs 55 ejecta 55 Beta Pictoris b 55 highly collimated 55 exo planets 55 UV wavelengths 55 geoid 55 circumstellar dust 55 interferograms 54 elongated orbits 54 Multi Object Spectrograph 54 radiative cooling 54 Oort cloud 54 rotational axis 54 fluorescence intensity 54 R Coronae Borealis 54 luminosity 54 W boson 54 #C# [009] 54 waning gibbous 54 type Ia supernova 54 carbonaceous chondrites 54 circumstellar disk 54 Kepler 9b 54 Capricornus 54 magnetar 54 southern constellation Carina 54 sub millimeter wavelengths 54 cometary material 54 UDFy # 54 spatial resolution 54 Methone 54 proto cluster 54 Wolf Rayet star 54 smallest exoplanet 54 CHARA 54 UVOT 54 Circinus X 1 54 lunar perigee 54 Churyumov Gerasimenko 54 HUDF 54 circumstellar disks 54 Kuiper Belt Objects 54 Type Ia supernovas 54 VHE gamma rays 54 Cygnus Lyra region 54 Orion nebula 54 auroral activity 54 mV V 54 infrared spectral 54 Herbig Haro 54 gravitational radiation 54 Jupiter magnetosphere 54 spectrographs 54 Oort Cloud 54 telescope atop Mauna 54 lunar crust 54 distant galaxies 54 cosmic cannibal 54 perigee 54 SMBH 54 Nature vol 54 ROSAT 54 HiRISE image 54 illuminance 54 photoelectron 54 Cassini flyby 54 substorm 54 ionized hydrogen 54 constellation Pisces 54 ESO Very Large Telescope 54 #'W 54 geomagnetic activity 54 femtosecond pulses 54 Kelvins 54 6nm 54 constellation Ara 54 Carina constellation 54 V# Mon 54 λ 54 dipolar 54 Interferometric 54 noctilucent clouds 54 X ray observatories 54 Angstroms 54 Ly alpha 54 elliptical orbits 54 mesosphere 54 HD# [005] 54 Gliese 54 sunlike star 54 WFPC2 54 moon Io 54 weak gravitational lensing 54 planetary surfaces 54 Tau Ceti 54 ecliptic 54 infall 54 imaging spectrometer 54 planets orbits 54 Lagrangian 54 extrasolar planets orbiting 54 unpolarized 54 microlensing 54 waxing crescent 54 LORRI 54 Saturn equinox 54 Digitized Sky Survey 54 Hubble Space Telescope HST 54 planet HD #b 54 spacecraft flyby 54 Borealis basin 54 electron neutrinos 54 Oph 54 Alycia Weinberger 54 Cephei 54 Gliese #c 54 nebula 54 planet TrES 54 Crab Pulsar 54 orbits Saturn 54 zodiacal light 53 lowermost mantle 53 antineutrinos 53 solar irradiance 53 Quadrantids 53 cm ² 53 Gliese #d 53 W#A [001] 53 spatially resolved 53 η 53 ACS WFC 53 Dwarf galaxies 53 electron volts 53 spatial scales 53 UKIRT 53 fissure eruption 53 gravitational lens 53 auroral displays 53 relativistic particles 53 orbital inclination 53 #.#N [002] 53 Rayleigh scattering 53 constellation Aquila 53 picoseconds 53 ordinary chondrite 53 interferometry 53 g cm 53 GPa 53 brown dwarf 53 brightest supernova 53 VIRTIS 53 planetary Transits 53 astrometry 53 star Beta Pictoris 53 synthetic aperture 53 Saturn magnetosphere 53 mK 53 transiting exoplanets 53 photocurrent 53 Globular Cluster 53 Cosmic Microwave Background CMB 53 Pleiades star 53 1μm 53 hypervelocity star 53 LOFAR 53 polarimetric 53 galactic nuclei 53 Tauri Sb 53 sodium atoms 53 Geminga 53 Arches Cluster 53 SNe 53 heliopause 53 ρ 53 Orion constellation 53 multispectral imager 53 cosmic microwave radiation 53 masers 53 electron flux 53 ° #'E 53 resonance frequency 53 Milky Way galaxy 53 sidereal 53 double helix nebula 53 ellipsoid 53 circular orbit 53 Camelopardalis 53 waveband 53 Saturnian system 53 astrometric 53 ESO La Silla 53 Cerro Paranal 53 F#W 53 perigee closest 53 globular clusters 53 coronal loop 53 intracluster 53 μm diameter 53 Andromedae 53 Elenin 53 Cepheus 53 X ray emitting 53 submillimeter wavelength 53 relativistic protons 53 YORP effect 53 X ray beam 53 backscattered 53 planet Gliese #c 53 vorticity 53 sunlike stars 53 thin crescent 53 binary quasar 53 NGC #A 53 magnetospheric 53 Raman spectra 53 infrared spectra 53 optical telescopes 53 km/# miles [002] 53 astronomical objects 53 HL Tau 53 circularly polarized 53 CoRoT 9b 53 S/# P2 53 CAIs 53 filamentary structures 53 ENAs 53 orbiting gamma ray 53 Eridanus 53 XMM Newton satellite 53 Apophis asteroid 53 Michelson interferometer 53 isotherm 53 interferometric observations 53 sun corona 53 wavelengths 53 polar vortex 53 #nm wavelengths 53 galactic halo 53 TNOs 53 SN #gy 53 coronal hole 53 μm 53 galactic clusters 53 coronal 53 magnetars 53 hyperspectral imager 53 auroral emissions 53 Leonid shower 53 Cydonia region 53 millisecond pulsars 52 Doppler measurements 52 mu Arae 52 proplyds 52 cosmic ray particles 52 tropospheric 52 LWIR 52 ESA Envisat 52 Fig. 3b 52 highly elliptical orbit 52 elliptical galaxies 52 zodiacal dust 52 protostar 52 VISTA telescope 52 SN Ia 52 kT 52 polar mesospheric clouds 52 TU# [002] 52 GJ #b [001] 52 Josephson junction 52 AKARI 52 ω 52 nebulosity 52 Saturnian moons 52 ultraviolet wavelength 52 Magnetars 52 Pluto Charon 52 Observable 52 nsec 52 Samuel Oschin Telescope 52 solar nebula 52 helium atoms 52 Fig. 2C 52 Antennae Galaxies 52 inhabitable planets 52 waxing gibbous moon 52 celestial object 52 QQ# 52 Orientale Basin 52 Subaru telescope 52 cosmological parameters 52 indel 52 #.#x magnification [001] 52 energetic gamma rays 52 moons Phobos 52 constellation Ophiuchus 52 Fig. 2c 52 HD #b [001] 52 crustal thickness 52 afterglows 52 attosecond 52 photometer 52 Martian equator 52 quasiparticle 52 Herschel telescope 52 satellite altimetry 52 Ontario Lacus 52 Rosetta orbiter 52 2dB 52 XO 3b 52 constellations Cygnus 52 Comet Hale Bopp 52 ARPES 52 HRTEM 52 Shoemaker Levy 52 geomagnetic field 52 Kuiper Belt Object 52 moonlets 52 dynamical evolution 52 Submillimeter 52 NGC# 52 Keck telescope 52 Saturn moon Iapetus 52 electron diffraction 52 supernova explosion 52 supersymmetric particles 52 Photometric 52 WM Keck Observatory 52 Telescope BAT 52 Infrared Thermal Imaging Spectrometer 52 muon neutrino 52 ESA Integral 52 Saturn outermost 52 #.#Hz 52 inelastic scattering 52 total solar irradiance 52 Corot 7b 52 planet orbiting 52 plagioclase 52 shorter wavelengths 52 speckle pattern 52 Comet Encke 52 mantle plumes 52 dipole dipole 52 WFC3 52 accretion disk 52 cosmic ray intensity 52 fig. S1 52 HARPS instrument 52 extrasolar planetary systems 52 ppbv 52 Olympus Mons 52 Fig. 3A 52 baryonic matter 52 Ophiuchi 52 muon neutrinos 52 gravitational lenses 52 PSR B# +# 52 luminous flux 52 exosphere 52 Cosmic Background Explorer 52 ellipsoids 52 Solar TErrestrial RElations Observatory 52 Gondolo 52 distant galaxy clusters 52 #cd m 2 52 Magellanic Clouds 52 stellar occultation 52 ionospheric 52 innermost planet 52 centroid 52 Figs. 52 meteoritic material 52 earthshine 52 Voyager spacecraft 52 orbital radius 52 Viking Lander 52 constellation Lyra 52 Super Kamiokande 52 Perseus Cluster 52 Interferometer VLTI 52 proton decay 52 red supergiants 52 #P/Holmes 52 telescopes atop Mauna 52 Lunar Orbiter Laser Altimeter 52 Fig. 1d 52 resolution panchromatic 52 Gamma ray bursts 52 Paranal Chile 52 candelas 52 DEEP2 52 Infrared Mapping Spectrometer VIMS 52 merging galaxies 52 FDG uptake 52 tau neutrinos 52 Kuiper Belt object 52 tropical latitudes 52 photometric 52 Hubble Ultra 52 radial velocities 52 MERIS 52 heavily cratered 52 nm excitation 52 Fig. 1D 52 m 52 comet Lulin 52 circumstellar 52 Sombrero Galaxy 52 radial velocity method 52 Planetary Transits 52 microns millionths 52 #.#mm [006] 52 morphologies 52 comet McNaught 52 Spectroscopic 52 Fig. 4a 52 lunar equator 52 -# deg [002] 52 constellation Piscis Austrinus 52 Cosmic Microwave Background 52 constellation Orion 52 magnetization 52 kyr 52 Hale Bopp 52 Tempel Tuttle 52 circular magnetic anomaly 52 Trapezium 52 constellation Fornax 52 optical wavelength 52 Reiner Gamma 52 Type 1a supernovae 51 ASPH lens 51 Area Telescope LAT 51 tropopause 51 Saturn moon Enceladus 51 macular thickness 51 phonon 51 μV 51 constellation Leo 51 Cepheid variable 51 Fig. 2B 51 basaltic rocks 51 supermassive 51 galactic mergers 51 Sedna 51 #P/Churyumov-Gerasimenko 51 Saturn moon Mimas 51 γ 51 rocky extrasolar planet 51 1kHz 51 planetary magnetospheres 51 photon counting 51 #.# MHz [002] 51 waxing crescent moon 51 W/m2 51 asteroid Vesta 51 C/# [001] 51 brown dwarfs 51 Comet NEAT 51 Hellas Basin 51 z ^ 51 #.#GHz [001] 51 ps nm 51 WMAP 51 interferometer 51 Hyakutake 51 waning crescent 51 Lyrid meteor shower 51 super Earths 51 constellation Perseus 51 M#.# 51 dust enshrouded 51 La Silla Observatory 51 frequency comb 51 predawn sky 51 circular orbits 51 Jupiter Ganymede 51 gibbous moon 51 ultraviolet imaging spectrograph 51 Fig. 4c 51 Microlensing 51 unaided eye 51 planet Uranus 51 HARPS spectrograph 51 Chilean Atacama Desert 51 Orionid meteor shower 51 exoplanet 51 GROND 51 SN #E 51 fluorescence excitation 51 obliquity 51 Earth magnetotail 51 Kuiper Belt objects 51 ah dus 51 milliarcseconds 51 relativistic jets 51 dwarf spheroidal 51 prograde 51 moons orbiting Saturn 51 Arsia Mons 51 Yb 51 RS Oph 51 protoplanetary 51 galactic equator 51 geoeffective 51 SN#A 51 compass headings 51 mmol 51 fig. S6 51 nmi 51 diffusivity 51 electron volts eV 51 galaxies 51 Galaxy Evolution 51 protoplanet 51 W/cm2 51 planets orbiting 51 infrared telescopes 51 SIRTF 51 Caloris 51 Comet Elenin 51 Roque de los 51 mG