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(Click for frequent words.) 74 Cosmic Microwave Background 71 Cosmic Microwave Background CMB 69 WMAP 68 CMB radiation 66 WMAP satellite 65 distant galaxies 65 Wilkinson Microwave Anisotropy Probe 64 NASA Wilkinson Microwave 64 supernova remnant 63 solar nebula 63 redshift 63 gravitational lensing 62 quasars 62 solar corona 62 X ray emission 62 distant supernovae 61 cosmologists 61 galaxies 61 galaxy clusters 61 supernovae 61 reionization 61 X ray wavelengths 61 quasar 60 Anisotropy Probe WMAP 60 Cosmologists 60 Adam Riess 60 Saturn rings 60 GJ #b [001] 60 cosmic rays 60 comet nucleus 60 Anisotropy Probe 60 AB Aurigae 59 filamentary structure 59 SN #A 59 galaxy cluster 59 Planck telescope 59 gamma ray burst 59 AGNs 59 gaseous planet 59 gravitational waves 59 Type Ia supernovae 59 planetary nebulae 59 Fomalhaut b 59 magnetar 59 X ray telescopes 59 earthshine 59 gamma ray bursts 59 XMM Newton 59 spectroscopic 59 HD#b 58 ejecta 58 distant quasars 58 Planck satellite 58 gravitational radiation 58 interferometry 58 cosmic microwave radiation 58 GRBs 58 distant quasar 58 Wilkinson Microwave Probe 58 Lyman alpha 58 protoplanetary disk 58 COBE 58 interstellar dust 58 RS Ophiuchi 57 SNR #-#.# 57 Milky Way galaxy 57 foreground galaxy 57 interstellar clouds 57 luminous galaxies 57 Cosmic Background Explorer 57 redshifts 57 Saturn magnetosphere 57 globular clusters 57 GRB #B 57 astrophysical 57 COROT 57 pulsar 57 GRB # 57 galaxy formation 57 cosmological distances 57 supernova explosions 57 sterile neutrino 57 Bok globules 57 neutrinos 57 supernova explosion 57 Gravitational waves 57 supernovas 57 GJ#b 57 missing baryons 57 constellation Virgo 57 gamma rays 57 interstellar medium 57 noctilucent clouds 57 protostars 57 galaxy redshift 57 X ray afterglow 57 ESA XMM Newton 57 observable universe 57 Hawking radiation 56 astronomers 56 permanently shadowed craters 56 polarimetry 56 axions 56 zodiacal light 56 cosmological 56 millisecond pulsars 56 GJ #b [002] 56 extrasolar planet 56 optical telescopes 56 intrinsic brightness 56 accretion disk 56 neutron stars 56 Crab Nebula 56 anisotropy 56 Hanny Voorwerp 56 Venusian atmosphere 56 cosmic gamma rays 56 Milky Way 56 pulsars 56 chondrules 56 Delta Cephei 56 lunar crust 56 KH #D 56 RXTE 56 faint galaxies 56 exoplanet 56 radial velocity 56 gamma ray emission 56 neutron star 56 interstellar cloud 56 infrared wavelengths 56 active galactic nuclei 56 Henize #-# 56 elliptical galaxies 56 axion 56 Earthlike planets 56 Coma Cluster 56 Milky Way Galaxy 55 supersymmetric particles 55 heliosphere 55 magnetospheric 55 cosmic ray 55 neutrino 55 Higgs particle 55 baryons 55 brown dwarfs 55 accretion disks 55 extrasolar planetary systems 55 SINFONI 55 G#.# +#.# 55 nebula 55 Hubble observations 55 Corot 9b 55 exoplanetary 55 RS Oph 55 planet HD #b 55 galactic cosmic rays 55 Kepler #b 55 Evolution Explorer 55 globular cluster 55 supernova 55 lensing galaxy 55 polar vortex 55 circumstellar 55 quark gluon plasma 55 weak gravitational lensing 55 W boson 55 Bug Nebula 55 Galaxy Evolution 55 electron neutrinos 55 magma ocean 55 SN#A 55 Cepheid variables 55 gamma rays emitted 55 TrES 4 55 visible wavelengths 55 protoplanet 55 outer planets 55 magnetic reconnection 55 X ray Observatory 55 globulars 55 Fermi telescope 55 gravitational lenses 55 distant supernovas 55 Spitzer Space Telescope 55 galaxy M# [002] 55 microlensing events 55 substorm 55 spacetime 55 microlensing 55 blackbody 55 spherical halo 55 comets 55 starburst galaxies 55 galaxy M# [001] 55 gamma ray 55 gravitational microlensing 54 red supergiant 54 X ray pulses 54 Comet Holmes 54 nebular 54 supernova remnants 54 BP Psc 54 RHESSI 54 HD #b [002] 54 metallicity 54 constellation Cassiopeia 54 Orion Nebula 54 planetary nebula 54 Rayleigh scattering 54 Corot 7b 54 Virgo Cluster 54 corona 54 auroral 54 Eta Carinae 54 type Ia supernovae 54 constellation Aquarius 54 faraway galaxies 54 Oort cloud 54 baryon 54 silicate dust 54 brightest supernova 54 Cepheids 54 spacecraft flyby 54 photosphere 54 SDSS II 54 polar craters 54 comet 54 constellation Eridanus 54 NASA Chandra 54 mantle plumes 54 starburst galaxy 54 neutral mass spectrometer 54 WASP #b 54 rocky planets 54 protostar 54 jovian 54 general relativity 54 planet Uranus 54 stellar seismology 54 type Ia supernova 54 detect gravitational waves 54 optical wavelengths 54 Gamma ray bursts 54 Earth magnetosphere 54 Alfven waves 54 Maunder minimum 54 muon 54 millisecond pulsar 54 Antennae Galaxies 54 ULIRGs 54 extrasolar 54 Large Magellanic Cloud 54 protoplanetary disks 54 Comet Halley 54 Epsilon Aurigae 54 magnetosphere 54 P/# A2 54 Type Ia supernova 54 redshifted 54 cryovolcanism 54 gravitational lens 54 heliosheath 54 Planck 54 HUDF 54 Cosmic Background Explorer COBE 53 Epsilon Eridani 53 elliptical galaxy 53 ESO VLT 53 proplyds 53 optical interferometry 53 ionosphere 53 muon neutrino 53 ultraviolet radiation emitted 53 submillimeter 53 Gravitational lensing 53 eclipsing binary 53 chromosphere 53 extrasolar planets 53 exoplanets 53 Omega Centauri 53 spatially resolved 53 V# Mon 53 magnetic polarity 53 silicon monoxide 53 attosecond 53 CMB photons 53 extragalactic 53 spectroscopically 53 HARPS spectrograph attached 53 Galilean moons 53 SN #C 53 Einstein theory 53 Cat Paw Nebula 53 submillimeter wavelengths 53 spectroscopy 53 Galileo spacecraft 53 blue supergiant 53 Crab Pulsar 53 HARPS instrument 53 asteroidal 53 NASA Cassini spacecraft 53 antineutrinos 53 sunspots 53 Astronomers 53 subatomic particles 53 mesosphere 53 strange quark 53 solar neutrinos 53 HiRISE image 53 infrared spectra 53 nucleosynthesis 53 gravitational wave 53 phyllosilicates 53 Type 1a supernovae 53 journal Icarus 53 photometer 53 TrES 53 Trifid Nebula 53 backscattered 53 interferometers 53 SN #gy 53 fainter objects 53 XMM Newton observations 53 Giovanni Cassini 53 energetic electrons 53 magnetic monopoles 53 YORP effect 53 stellar occultation 53 occultations 53 quantum gravity 53 radioactive decay 53 constellation Carina 53 spiral nebulae 53 Jupiter magnetosphere 53 gamma ray flares 53 Raman spectroscopy 53 Type Ia 53 Andromeda galaxy 53 Cygnus X 53 Geminga 53 VB #b 53 troposphere 53 photons 53 Gal Yam 53 GALEX 53 spherules 52 Cassini ion 52 Ulysses spacecraft 52 NASA Cosmic Background 52 COBE satellite 52 diffraction pattern 52 X ray observatories 52 frequency comb 52 planetesimals 52 dwarf galaxies 52 matter antimatter asymmetry 52 photometry 52 Chandra X ray 52 Saturnian moon 52 ultraviolet wavelengths 52 Mössbauer 52 X ray observatory 52 WHIM 52 Kuiper belt 52 SPICAM 52 retrograde orbit 52 icy moons 52 ionized hydrogen 52 superfluidity 52 cometary material 52 spectroscopic measurements 52 gamma ray observatory 52 Aram Chaos 52 moons orbiting 52 planets orbiting distant 52 magnetic fields 52 Earth ionosphere 52 astrophysicists 52 ultracold 52 dwarf galaxy 52 ray Space Telescope 52 isotopic 52 Voyager spacecraft 52 laser pulses 52 icy comets 52 celestial sphere 52 heliospheric 52 magnetars 52 astronomical objects 52 electron density 52 nebulae 52 cometary dust 52 photoelectric effect 52 Diviner 52 Infrared Thermal Imaging Spectrometer 52 lunar perigee 52 Herschel telescope 52 geoneutrinos 52 quantum theory 52 interstellar space 52 Saturn moons 52 tau neutrino 52 constellation Ursa Major 52 RRATs 52 Red Rectangle 52 polar caps 52 pseudogap 52 circumstellar disks 52 airglow 52 Andromeda Galaxy 52 Fermi LAT 52 cosmic 52 outer corona 52 exo planet 52 atmospheric aerosols 52 circumstellar disk 52 spiral galaxy NGC 52 planemos 52 solitons 52 cosmological constant 52 merging galaxies 52 neutralinos 52 exoplanets orbiting 52 Planck spacecraft 52 spectrographs 52 BLG #Lb 52 Enceladus 52 Quadrantid meteor shower 52 novae 51 planets orbits 51 distant galaxy 51 quantum particle 51 smallest exoplanet 51 galaxy 51 GRB# 51 comet Tempel Tuttle 51 infrared radiation 51 terrestrial planets 51 Bose Einstein condensate 51 Jupiter moon Io 51 occultation 51 interstellar dust grains 51 APXS 51 Astrophysicists 51 moon Mab 51 SIRTF 51 KT boundary 51 sulfur isotope 51 hydroxyl molecules 51 supergiant star 51 chondrites 51 planet magnetosphere 51 reflection nebula 51 constellation Lyra 51 Kuiper belt objects 51 exoplanet orbiting 51 protoplanetary 51 ringed planet 51 Oort Cloud 51 cosmic dust 51 Keck telescope 51 astronomical observations 51 comet Wild 51 neutrino oscillation 51 cosmology 51 stellar occultations 51 hot Jupiters 51 Arches Cluster 51 Gondolo 51 HM Cancri 51 galactic disk 51 Kuiper Belt 51 Gamma rays 51 faintest galaxies 51 comets asteroids 51 SOHO spacecraft 51 particle acceleration 51 neutrino oscillations 51 interstellar dust clouds 51 WIMPs 51 cosmic cannibal 51 blazars 51 moonlet 51 boson 51 active galactic nucleus 51 Mpc 51 Gliese #g 51 Grillmair 51 comets orbiting 51 constellation Ophiuchus 51 meteorite bombardment 51 spiral galaxies 51 Galilean satellites 51 interferometric 51 photons emitted 51 telescopic observations 51 transiting planet 51 tau neutrinos 51 muon neutrinos 51 supermassive stars 51 CoRoT satellite 51 synchrotron emission 51 Comet Hale Bopp 51 cosmological theories 51 Keck Telescope 51 Type Ia supernovas 51 Bose Einstein condensates 51 spectroscopic observations 51 primitive meteorites 51 meteoroid 51 neutrino mass 51 spectral fingerprint 51 Astrophysical Journal 51 neutralino 51 X ray spectrometer 51 Bullet Cluster 51 orbited Jupiter 51 J# +# [002] 51 proton decay 51 exo planets 51 emission nebula 51 Triangulum Galaxy 51 Astrophysical 51 VIRTIS 51 Magellanic Stream 51 ARPES 51 NEAs 51 Mini SAR 51 tropospheric 51 galactic clusters 51 sunspot 51 radiometers 51 diffuse aurora 51 Martian surface 50 Gliese #c 50 transiting planets 50 Comet Hartley 50 galactic bulge 50 gravity warps 50 Heterodyne Instrument 50 particles WIMPs 50 moonlets 50 journal Meteoritics 50 asteroseismology 50 arcminutes 50 substorms 50 Keck Interferometer 50 neutron spectrometer 50 baryonic 50 spectra 50 kaons 50 supernova remnant Cassiopeia 50 planets 50 Spitzer infrared spectrograph 50 Edwin Hubble 50 sundog 50 CRISM 50 cesium atom 50 superfluid 50 Alfvén waves 50 red supergiants 50 MG J# +# 50 HARPS spectrograph 50 meteorite impacts 50 radial velocity method 50 superheavy elements 50 infrared telescope 50 spectroscopic analysis 50 post perovskite 50 MARSIS 50 Iapetus 50 star Gliese 50 SN #E 50 CoRoT #b 50 gravitational interactions 50 microwave radiation 50 relativistic particles 50 Voorwerp 50 polar stratospheric 50 silicate crystals 50 KBOs 50 Big Bang 50 Milky Way halo 50 cosmos 50 oxygen isotopes 50 supermassive black hole 50 Sagittarius B2 50 neutrino particles 50 CAIs 50 exoplanets planets 50 galaxy NGC 50 diffraction patterns 50 Composite Infrared Spectrometer 50 Hot Jupiters 50 millimeter wavelengths 50 UVOT 50 submillimetre wavelengths 50 starquakes 50 stellar nurseries 50 cosmic ray flux 50 sonoluminescence 50 infall 50 AKARI 50 Hipparcos 50 Nasa spacecraft 50 mineralogical composition 50 ionized gas 50 Saturn Enceladus 50 noble gases 50 globular star 50 fundamental constants 50 Upsilon Andromedae 50 planet Gliese #c 50 Wolszczan 50 energetic gamma rays 50 innermost planet 50 photoemission 50 HIRES spectrometer 50 quantum mechanics 50 planetary Transits 50 photon 50 maser 50 Earthlike 50 planetary atmospheres 50 retrograde orbits 50 X ray binary 50 high redshift galaxies 50 quantum electrodynamics 50 transiting exoplanet 50 dust enshrouded 50 supermassive black holes 50 PSR J# 50 exciton 50 elemental composition 50 Gisela Winckler 50 cosmic magnifying glass 50 cosmic phenomena 50 interstellar boundary 50 THz radiation 50 helium nuclei 50 Kuiper Belt Objects 50 Martian meteorites 50 magnetotail 50 Virgo cluster 50 Higgs bosons 50 type 1a supernovae 50 Tycho supernova remnant 50 carbonaceous chondrites 50 hypervelocity stars 50 spiral galaxy 50 afterglows 50 barred spiral galaxy 50 gaseous planets 50 periodic oscillations 50 intracluster 50 Orion nebula 50 Butterfly Nebula 50 Kashlinsky 50 cometary nucleus 50 infrared wavelength 50 Syrtis Major 50 plasmon 50 colliding galaxies 50 Halley comet 50 orbiting gamma ray 50 Explorer WISE 50 ultraluminous galaxy 50 cosmic neutrinos 50 polar regions 50 exoplanetary systems 50 brightnesses 50 planets atmospheres 50 ESO Very Large Telescope 50 THEMIS satellites 50 cometary 50 physicist Max Planck 50 planets moons 50 subsurface ocean 50 sterile neutrinos 50 filamentary 50 X ray binaries 50 UDFy # 50 Neil Gehrels 50 planets orbiting 50 Nikku Madhusudhan 50 coronal loops 50 ULP cepheids 50 keV 50 permanently shadowed regions 50 XTE J# 50 Mini TES 50 Carina Nebula 50 submillimeter galaxies 50 diffracted 50 Gamma ray burst 50 weakly interacting 50 moon Ganymede 50 martian surface 50 NASA COBE satellite 49 helium atoms 49 quantum optics 49 orbiting Chandra 49 singularities 49 comet dust 49 celestial bodies 49 HII regions 49 brown dwarf 49 planetary transits 49 SUSY 49 polaritons 49 radiative cooling 49 Jupiter Saturn Uranus 49 SNe Ia 49 Kepler telescope 49 SN #D 49 NASA Voyager spacecraft 49 supernovae explosions 49 Martian atmosphere 49 moon Enceladus 49 sunlike stars 49 Kailash Sahu 49 Eagle Nebula 49 planet orbits 49 zodiacal dust 49 extrasolar planets orbiting 49 Submillimeter Array 49 sun corona 49 NASA Far Ultraviolet 49 photon counting 49 quasiparticle 49 absorption spectra 49 galactic cores 49 particle astrophysics 49 nucleobases 49 moon Titan 49 muons 49 submillimetre 49 aurorae 49 radar interferometry 49 astrophysical phenomena 49 Compact Reconnaissance Imaging Spectrometer 49 high temperature superconductivity 49 shorter wavelengths 49 constellation Sagittarius 49 Helix nebula 49 reionization epoch 49 Comet Hartley 2 49 moon permanently shadowed 49 shadowy craters 49 Solar System 49 NASA WMAP 49 interferometer 49 Yarkovsky effect 49 atomic particles 49 homochirality 49 arcsec 49 dynamical 49 emits X rays 49 Helix Nebula 49 Mimas 49 phonon 49 earthlike planets 49 lunar meteorites 49 coronal heating 49 radar altimetry 49 Small Magellanic Cloud 49 sunlike star 49 Climate Experiment GRACE 49 proto galaxies 49 impactors 49 Laser Interferometer Gravitational Wave 49 maser emission 49 X ray photons 49 Comet #P/Holmes 49 cuprates 49 solar flares 49 Nasa Kepler 49 lunar crater 49 HD# [002] 49 Goldilocks planet 49 Mojzsis 49 GRB #A 49 Astrophysical Journal Letters 49 Cerenkov radiation 49 SN Ia 49 MARSIS radar 49 abundances 49 Optical Gravitational Lensing Experiment 49 Cometary 49 moon Mimas 49 planet orbiting 49 spherically symmetric 49 constellation Hercules 49 moon Io 49 COROT 7b 49 NASA STEREO 49 Comet 9P/Tempel 1 49 celestial phenomena 49 W bosons 49 oxygen isotope 49 radiative 49 Betelgeuse 49 interacting galaxies 49 Sara Seager 49 spatial dimensions 49 martian meteorites 49 cirrus cloud 49 coronal loop 49 Wolf Rayet star 49 cluster NGC 49 optical spectra 49 blazar 49 aerosol particles 49 Mercury flyby 49 Kuiper belt object 49 Neutron stars 49 Brownian motion 49 WM Keck Observatory 49 Supernova #A 49 Milankovitch cycles 49 x ray beam 49 Spectrograph 49 carbonate minerals 49 backscattering 49 Hubble Ultra 49 Jonathan Lunine 49 Cancri e 49 Diviner instrument 49 Toutatis 49 exosphere 49 galactic mergers 49 Hubble Constant 49 magnetic substorms 49 gamma ray emitting 49 cosmic ray particles 49 subatomic 49 magnetic excitations 49 Vikhlinin 49 supercontinent 49 Comet Tempel Tuttle 49 Comet Lulin 49 VHE gamma rays 49 super Earths 49 rotating neutron stars 49 ESO telescope 49 superluminal 49 fading afterglow 49 constellation Centaurus 49 Einstein cosmological constant 49 semiconductor nanocrystals 49 Geminid shower 49 frequency combs 49 NICMOS 49 electroweak 49 coronagraph 49 tiniest particles 49 lightwaves 49 photoluminescence 49 VY Canis Majoris 49 galactic halo 49 antiferromagnets 49 Cassini flyby 49 spin Seebeck 49 cometary debris 49 supersymmetry 49 ferric oxides 49 planet HD#b 49 blackbody radiation 49 Orionids 49 dense clumps 49 proto cluster 49 infalling 49 constellation Vulpecula 49 planetary orbits 49 sunspot activity 49 Paleocene Eocene Thermal Maximum 48 atomic nuclei 48 Late Heavy Bombardment 48 transiting exoplanets 48 antimatter 48 David Spergel 48 meteoroids 48 infrared astronomy 48 atoms 48 Heliospheric Observatory SOHO 48 constellation Scorpius 48 particle detectors 48 microscopic specks 48 exosolar planets 48 Haumea 48 constellation Libra 48 inhomogeneities 48 IR wavelengths 48 ESA Integral 48 Dumbbell Nebula 48 NanoSIMS 48 astrophysical objects 48 Quadrantids 48 gravitationally lensed 48 GeV 48 photoelectron 48 meridional flow 48 #gy 48 Active Galactic Nuclei 48 telescopes astronomers 48 bolometers 48 imaging spectrometer 48 OMEGA instrument 48 sunspot cycle 48 quasicrystal 48 Doppler measurements 48 volcanic moon Io 48 ROSAT 48 protoplanets 48 volcanism 48 superstrings 48 planets asteroids 48 wave particle duality 48 lowermost mantle 48 lunar surface 48 WISE infrared 48 cosmic strings 48 masers 48 wavefunction 48 infrared spectrometers 48 comet tail 48 isotopic ratios 48 Einstein relativity theory 48 binary asteroid 48 UA Lunar 48 diffraction 48 atomic nucleus 48 Pieter van Dokkum 48 dynamical processes 48 baryonic matter 48 Saturnian 48 planets comets 48 celestial objects 48 galactic cosmic ray 48 Very Large Array 48 moons 48 gravitationally bound 48 helium atom 48 Ionosphere Sounding 48 TGFs 48 galaxies collide 48 gamma ray radiation 48 periodic dimming 48 electron orbits 48 smoggy atmosphere 48 ionospheric 48 infrared telescopes 48 supersolid 48 lunar poles 48 thermosphere 48 Muchachos Observatory 48 radiative transfer 48 astrophysics 48 Beta Pictoris 48 spectroscopic technique 48 colloidal crystals 48 nuclei 48 rotational axis 48 electron volt 48 Great Conveyor Belt 48 photochemistry 48 Higgs singlet 48 Earthlike planet 48 water vapor 48 circumstellar dust 48 Saturn outermost 48 nebulosity 48 Stephan Quintet 48 Shoemaker Levy 48 dwarf spheroidal galaxies 48 Raman spectra 48 Arabia Terra 48 heliopause 48 tholins 48 comet McNaught 48 plasmons 48 extrasolar planetary 48 distant galaxy clusters 48 detect neutrinos 48 Fornax cluster 48 heavily cratered 48 Kuiper Belt Object 48 NASA Fermi Gamma 48 isotopic composition 48 Zeta Ophiuchi 48 THEMIS 48 ESO PR 48 diffract 48 starlight 48 galaxy NGC# 48 ionised gas 48 osmium 48 subatomic particle