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(Click for frequent words.) 71 X ray observatories 70 X ray observatory 69 infrared telescopes 69 distant supernovae 69 RXTE 68 ESA XMM Newton 68 NASA Wilkinson Microwave 68 gamma ray observatory 68 X ray wavelengths 68 Hubble observations 68 RS Ophiuchi 68 type Ia supernovae 68 X ray emission 67 GALEX 67 RHESSI 67 planetary Transits 67 exoplanetary 66 blazars 66 XMM Newton 66 gamma ray emission 66 AB Aurigae 66 THEMIS satellites 66 distant quasars 66 X ray afterglow 66 Fermi telescope 66 microlensing events 66 Hubble Space Telescope HST 66 optical telescopes 66 GRB #B 66 gamma ray flares 66 interferometers 66 Keck telescopes 66 fainter objects 66 optical wavelengths 66 submillimetre 66 astrophysical phenomena 66 intrinsic brightness 66 SN #A 66 WMAP satellite 66 Mössbauer 66 solar corona 65 UVOT 65 Ulysses spacecraft 65 ESO VLT 65 merging galaxies 65 X ray Observatory 65 Type Ia supernova 65 cosmological distances 65 coronagraph 65 polarimetry 65 ROSAT 65 Evolution Explorer 65 Keck Telescope 65 X ray pulses 65 occultations 65 quasars 65 millimeter wavelengths 65 magnetars 64 IBEX spacecraft 64 Planck satellite 64 blazar 64 detect gravitational waves 64 supergiant star 64 Spitzer infrared 64 GRBs 64 RS Oph 64 Fomalhaut b 64 active galactic nuclei 64 spectrographs 64 Comet Holmes 64 Anisotropy Probe WMAP 64 galactic clusters 64 gravitational lenses 64 photometer 64 cosmic microwave radiation 64 Upsilon Andromedae 64 Type Ia supernovae 64 extragalactic 64 galaxy clusters 64 Epsilon Eridani 63 filamentary structure 63 Keck telescope 63 spectroscopic measurements 63 elliptical galaxy NGC 63 airglow 63 ultraviolet wavelengths 63 HM Cancri 63 cosmic phenomena 63 STEREO spacecraft 63 Kuiper belt objects 63 gravitational radiation 63 LOFAR 63 astronomical objects 63 microlensing 63 afterglows 63 NuSTAR 63 Orbiter LRO 63 X ray spectrometer 63 NASA Chandra 63 radial velocity 63 XMM Newton satellite 63 ray Space Telescope 63 interferometric 63 galaxy M# [001] 63 Solar TErrestrial RElations Observatory 63 AGNs 63 NASA Cosmic Background 63 astronomers 63 Red Rectangle 63 infrared observatory 63 Cosmic Microwave Background 63 Gravitational waves 63 Cepheid variables 63 exoplanets orbiting 63 photometry 63 galaxy M# [002] 62 infrared spectrometers 62 orbiting observatories 62 eclipsing binary 62 gamma ray spectrometer 62 redshifts 62 supernova remnant 62 stellar occultations 62 galaxy NGC 62 WISE infrared 62 ESA Integral 62 gamma ray bursts 62 orbiting Chandra 62 X ray binary 62 HARPS instrument 62 MG J# +# 62 Submillimeter Array 62 astrophysical objects 62 distant quasar 62 infrared astronomy 62 polarimetric 62 moon Io 62 neutrino particles 62 Hanny Voorwerp 62 Earth orbiting satellites 62 Burst Alert 62 Spectrograph 62 photons emitted 62 Keck Interferometer 62 neutrino detectors 62 Supernova #A 62 spectroscopic 62 infrared imager 62 extrasolar 62 brightest supernova 62 submillimeter wavelengths 62 novae 62 lensing galaxy 62 accretion disks 62 gamma ray detectors 62 stellar occultation 62 Anisotropy Probe 62 GRB# 62 APXS 62 orbiting telescopes 62 supernova remnants 62 Observatory SDO 62 luminous galaxies 62 Telescope BAT 62 ESO telescopes 62 cosmic cannibal 62 earthshine 62 extrasolar planetary systems 62 Cosmic Microwave Background CMB 62 infrared ultraviolet 61 transiting exoplanets 61 spectroscopic observations 61 imaging spectrometer 61 galactic mergers 61 gravitationally lensed 61 planets orbiting distant 61 gamma ray burst 61 distant galaxy 61 supernova explosion 61 galaxy cluster 61 millisecond pulsar 61 ESO telescope 61 supernovae 61 Wilkinson Microwave Anisotropy Probe 61 Milky Way halo 61 Gamma ray 61 X ray telescope 61 VIRTIS 61 Ultraviolet Optical Telescope 61 V# Mon 61 Nasa spacecraft 61 geoneutrinos 61 Convection Rotation 61 Herschel telescope 61 Fermi LAT 61 Beta Pictoris b 61 GRB # 61 Suzaku X ray 61 planetary transits 61 orbiting gamma ray 61 CoRoT satellite 61 X ray Telescope XRT 61 Geminga 61 Type Ia supernovas 61 extrasolar planets 61 Infrared Thermal Imaging Spectrometer 61 spiral galaxy NGC 61 Area Telescope LAT 61 magnetospheric 61 faint galaxies 61 Galactic cosmic rays 61 circumstellar 61 WM Keck Observatory 61 backscattered 61 SDSS II 61 proto galaxies 61 Mauna Kea Hawaii 61 HiRISE image 61 supernovas 61 hexagonal mirrors 61 Carina constellation 61 Alpha Particle 61 sunlike stars 61 Solar Dynamics Observatory 61 Viking landers 60 Delta Cephei 60 distant supernovas 60 SOHO spacecraft 60 distant galaxy clusters 60 astronomical observations 60 Kuiper Belt Objects 60 circumstellar disks 60 Voyager spacecraft 60 galactic cosmic rays 60 CMB radiation 60 Epsilon Aurigae 60 Stephan Quintet 60 Galaxy Evolution 60 interferometry 60 planets orbits 60 pulsars 60 infrared telescope 60 Galileo spacecraft 60 Trifid Nebula 60 Bug Nebula 60 starburst galaxies 60 spectral bands 60 astrometry 60 HARPS spectrograph attached 60 orbiting Hubble Space Telescope 60 Laser Interferometer Gravitational Wave 60 constellation Centaurus 60 Lyman alpha 60 radiometers 60 magnetar 60 Arches Cluster 60 gamma ray telescopes 60 spectroscope 60 Rosetta orbiter 60 electron neutrinos 60 starburst galaxy 60 moonquakes 60 Earthlike planets 60 Subaru Telescope 60 Explorer WISE 60 NASA Far Ultraviolet 60 celestial phenomena 60 Comet Halley 60 VLTI 60 magnetic reconnection 60 Cosmic Background Explorer 60 laser altimeter 60 Jovian moons 60 GJ #b [002] 60 radio occultation 60 Magnetic Imager HMI 60 detect gamma rays 60 muon neutrino 60 SN #E 60 NASA THEMIS 60 Heterodyne Instrument 60 active galactic nucleus 60 particle acceleration 60 gravitational wave 60 exo planets 60 retroreflector 60 UKIRT 60 Multi Object Spectrometer 60 Galilean moons 60 distant galaxies 60 gravitational waves 60 spectrometers 60 Comet 9P/Tempel 1 60 multiwavelength 60 Jupiter moon Io 60 telescopic observations 60 starquakes 60 Crab Nebula 60 Saturnian moon Titan 60 Bullet Cluster 60 Infrared Pathfinder Satellite 60 galactic nuclei 60 Helioseismic 60 constellation Carina 60 COROT 60 millisecond pulsars 60 neutron spectrometer 60 astronomical telescope 60 planets orbiting 60 infrared spectra 60 optical spectra 59 quasar 59 Planck telescope 59 gravitational microlensing 59 submillimeter 59 infrared wavelengths 59 J#.# [001] 59 Coma Cluster 59 KamLAND 59 reionization 59 Great Observatories 59 antineutrinos 59 planetary nebulae 59 spectrographic 59 Heliospheric Observatory SOHO 59 pointings 59 KBOs 59 SN #C 59 microshutters 59 jovian 59 gamma ray 59 GRB #A 59 spectrometer 59 redshift 59 type Ia supernova 59 Keck Observatory 59 SN#A 59 radiometer 59 proton antiproton 59 Mars Reconnaissance Orbiter MRO 59 Infrared Array Camera 59 AKARI 59 gamma rays emitted 59 Cancri e 59 RRATs 59 Subaru telescope 59 EVLA 59 SN #gy 59 Observatory STEREO 59 Triangulum Galaxy 59 accretion disk 59 VLBA 59 telescope 59 gamma ray observatories 59 transiting planets 59 HD #b [002] 59 HUDF 59 XTE J# 59 lunar crust 59 Cat Paw Nebula 59 Cepheids 59 X ray emitting 59 neutron stars 59 Orbiter MRO 59 ultraviolet imaging spectrograph 59 cosmic microwave background 59 telescopes 59 GJ #b [001] 59 Gamma ray bursts 59 NASA Lunar Prospector 59 Advanced LIGO 59 optical interferometry 59 neutral mass spectrometer 59 spacecraft orbiting 59 Active Galactic Nuclei 59 coronal loops 59 photoluminescence 59 extrasolar planets orbiting 59 inhabitable planets 59 Climate Experiment GRACE 59 galaxies 59 THEMIS spacecraft 59 supernova SN 59 Henize #-# 59 transiting planet 59 outer corona 59 interacting galaxies 59 scanning electron microscopes 59 astrophysical 59 spectroscopic analysis 59 Very Large Array 59 globular clusters 59 HD#b 59 Swift Ultraviolet Optical 59 SNR #-#.# 59 spacecraft Cassini 59 neutrino experiments 59 interplanetary spacecraft 59 Seyfert galaxies 59 outermost planets 59 photoelectron 59 Near Infrared Camera 59 Chandra X ray 59 SN #D 59 exo planet 59 ESO Paranal Observatory 59 weak gravitational lensing 59 infrared wavelength 59 Relations Observatory STEREO 59 EPOCh 59 radiotelescope 59 Telescope LSST 59 Butterfly Nebula 59 Fermi Gamma ray 59 Thermal Emission Spectrometer 59 TrES 4 58 Super Kamiokande 58 wavelength infrared 58 planet HD #b 58 particle detectors 58 particle physics experiments 58 heliospheric 58 substorm 58 spaceborne 58 supernova 58 Venusian atmosphere 58 submillimetre wavelengths 58 metallicity 58 Lunar Reconnaissance Orbiter LRO 58 galaxies collide 58 ESO Very Large Telescope 58 gamma ray detector 58 visible wavelengths 58 ESA Envisat satellite 58 galaxy redshift 58 blue supergiant 58 extrasolar planet 58 optical microscopy 58 spectral fingerprints 58 exoplanets 58 comet Hale Bopp 58 Comet Hartley 2 58 tau neutrino 58 X ray spectroscopy 58 magnetotail 58 icy moons 58 SIRTF 58 WMAP 58 STIS 58 axions 58 planets orbiting stars 58 Doppler shifts 58 gravitational lensing 58 KH #D 58 energetic electrons 58 gaseous planet 58 G#.# +#.# 58 TGFs 58 Surveys ACS 58 red supergiant 58 X ray photons 58 HiRISE camera 58 interferometer 58 absorption spectra 58 celestial object 58 rotational axis 58 spectral fingerprint 58 planet orbiting 58 Corot 9b 58 foreground galaxy 58 Diviner 58 gravitational lens 58 HESS telescopes 58 spectroscopically 58 Hinode spacecraft 58 meter Keck telescope 58 meter Keck telescopes 58 spacecraft flyby 58 spectra 58 galactic disk 58 Earth Observation satellites 58 interstellar clouds 58 SeaWiFS 58 elliptical galaxy 58 relativistic particles 58 elliptical galaxies 58 Herschel Space Telescope 58 muon neutrinos 58 Helix Nebula 58 aboard ESA Envisat 58 Type 1a supernovae 58 radial velocity technique 58 binary quasar 58 Spitzer Space Telescope 58 infall 58 astrometric 58 exosphere 58 volcanic plumes 58 rotating neutron stars 58 galaxy formation 58 Orion nebula 58 Voorwerp 58 ESO PR 58 Interferometer 58 gravitational interactions 58 AU Mic 58 coronal mass ejections CMEs 58 Cassini 58 Adam Riess 58 cosmic ray particles 58 Very Large Telescope 58 telescopes astronomers 58 spectral characteristics 58 barred spiral galaxy 58 comet nucleus 58 near infrared NIR 58 Mars Pathfinder lander 58 azimuthal 58 microquasar 58 globulars 58 lightwaves 58 Planetary Transits 58 supersymmetric particles 58 NASA Cassini spacecraft 58 TNOs 58 UVIS 58 retrograde orbit 58 constellation Ursa Major 58 sodium atoms 58 HIRES spectrometer 58 SPIRE instrument 58 exoplanets planets 58 intracluster 58 Cassini flybys 58 Descent Imager Spectral Radiometer 58 photon counting 58 Hinode 58 Wilkinson Microwave Probe 58 Type Ia 58 masers 57 Cosmologists 57 situ measurements 57 Array ALMA 57 THEMIS 57 periodic dimming 57 bolometers 57 spiral galaxy Messier 57 fading afterglow 57 constellation Eridanus 57 Muchachos Observatory 57 spectral measurements 57 diffuse aurora 57 Pluto Charon 57 Doppler shift 57 NASA Fermi Gamma 57 orbiting telescope 57 Mini TES 57 gaseous planets 57 mineralogical composition 57 noctilucent clouds 57 terrestrial planets 57 constellation Cetus 57 SIM PlanetQuest 57 ESA Envisat 57 infrared interferometry 57 basaltic rocks 57 multiband imaging photometer 57 Saturn magnetosphere 57 Multi Object Spectrograph 57 fluorescence microscope 57 Nikku Madhusudhan 57 NASA Great Observatories 57 Milky Way Galaxy 57 ESA Cluster 57 OGLE TR 57 Veil Nebula 57 Martian rovers 57 planets orbiting sun 57 cluster NGC 57 Hawking radiation 57 relativistic jets 57 Reflection Radiometer 57 gamma ray bursts GRBs 57 Lunar Prospector 57 Imaging Spectrometer 57 protostars 57 linearly polarized 57 SINFONI 57 Andromeda galaxy 57 silicon monoxide 57 solar radii 57 Space Telescope 57 luminosities 57 Higgs bosons 57 auroral emissions 57 moon Enceladus 57 Sagittarius B2 57 #gy 57 comet McNaught 57 gamma ray radiation 57 radar altimetry 57 Atacama Large Millimeter submillimeter 57 Eta Carinae 57 VISTA telescope 57 globular cluster M# 57 hyperspectral imager 57 spectrometric 57 Cosmic Background Explorer COBE 57 O OREOS 57 arcminutes 57 trans Neptunian objects 57 VHE gamma rays 57 antineutrino 57 nebular 57 Earth ionosphere 57 Spectrometer 57 protoplanet 57 NASA STEREO 57 XMM Newton X ray 57 Atacama Large Millimeter Array 57 ATLAS detector 57 helium atoms 57 Kepler #b 57 Cygnus X 57 Kepler spacecraft 57 photosphere 57 Astrophysical Research 57 gamma rays 57 planets 57 Ring Nebula 57 interstellar dust grains 57 Cerro Paranal 57 smallest exoplanet 57 Cloud Aerosol Lidar 57 PSR B# 57 ultraviolet spectrograph 57 giant elliptical galaxy 57 Lunar Reconnaissance Orbiter Camera 57 Laser Interferometer Space 57 GJ#b 57 interferograms 57 particle detector 57 X ray binaries 57 Dumbbell Nebula 57 twin STEREO spacecraft 57 Mercury magnetosphere 57 icy comets 57 dynamical evolution 57 Mpc 57 globular cluster 57 constellation Cassiopeia 57 substorms 57 coronal holes 57 Hipparcos 57 XMM Newton observations 57 exoplanet hunter 57 Alfven waves 57 Interferometric 57 orbiting observatory 57 moons orbiting 57 Magellanic Clouds 57 protostar 57 proplyds 57 galactic nucleus 57 optical telescope 57 SNfactory 57 Cassini flyby 57 LORRI 57 reflection nebula 57 radar altimeter 57 auroral activity 57 Virgo Cluster 57 Omega Centauri 57 Spectrometers 57 Orion Nebula 57 Saturnian moon 57 Dynamics Observatory 57 electron diffraction 57 gravitational redshift 57 pulsar 57 WFC3 57 Crab Pulsar 57 Ultraviolet Imaging Spectrograph UVIS 57 Interstellar Boundary Explorer 57 supergiant stars 57 ENAs 57 spatially resolved 57 solar prominences 57 infrared spectrograph 56 NASA Kepler telescope 56 proton decay 56 nucleosynthesis 56 BepiColombo 56 infrared spectrometer 56 ionisation 56 LRO spacecraft 56 brightnesses 56 cosmic ray 56 ESA Herschel 56 UCO Lick 56 Pleiades cluster 56 Saturn aurora 56 Earthlike planet 56 NASA WMAP 56 radiometry 56 Lagoon Nebula 56 QWIP 56 parahydrogen 56 Herschel Space 56 spectrograph 56 femtosecond pulses 56 exoplanet orbiting 56 Doppler measurements 56 Adaptive optics 56 sunlike star 56 neutrino 56 GROND 56 MARSIS radar 56 Cassini ion 56 star Gliese 56 spherically symmetric 56 constellation Hercules 56 La Silla observatory 56 Mars landers 56 eclipsing binaries 56 gamma ray photons 56 Earthlike 56 NASA Interstellar Boundary 56 phyllosilicates 56 exhaust plume 56 brown dwarfs 56 Raman spectra 56 ALMA antennas 56 Saturnian 56 Cosmic Origins Spectrograph 56 SNe Ia 56 gamma ray telescope 56 Proxima Centauri 56 meteoritic material 56 polaritons 56 collimated 56 Composite Infrared Spectrometer 56 Spitzer infrared spectrograph 56 Ray Spectrometer 56 HiRISE camera aboard 56 planet Uranus 56 Syrtis Major 56 WASP #b 56 unmanned probes 56 Io Europa 56 photoemission 56 radar interferometry 56 dwarf galaxy 56 OGLE TR #b 56 INMS 56 celestial observations 56 ChemCam 56 zodiacal light 56 HII regions 56 ESA Planck 56 CALIPSO 56 dipole moment 56 stellar seismology 56 NASA Landsat 56 flyby Cassini 56 ESA ERS 56 Mars Odyssey spacecraft 56 Comet Hartley 56 nebulae 56 energetic gamma rays 56 faintest galaxies 56 D CIXS 56 NASA MESSENGER spacecraft 56 TanDEM X 56 earthlike planets 56 Antenna LISA 56 proton proton 56 auroral displays 56 NASA ICESat 56 IR wavelengths 56 electron volts eV 56 terahertz frequencies 56 gravitationally bound 56 IKAROS 56 red supergiants 56 Samuel Oschin Telescope 56 galactic cores 56 NEAs 56 Saturn rings 56 interstellar cloud 56 LIGO 56 cosmic rays 56 LOFAR telescope 56 Jupiter Ganymede 56 Suzaku 56 ionized gases 56 cosmological parameters 56 celestial objects 56 solar neutrinos 56 Infrared Astronomical Satellite 56 Alfvén waves 56 Context Camera 56 APEX telescope 56 VY Canis Majoris 56 astrophysicists 56 colloidal crystals 56 interstellar dust 56 HARPS spectrograph 56 binary asteroid 56 numerical simulations 56 Astrophysicists 56 Extragalactic 56 neutron star 56 Andromeda halo 56 Saturn moons 56 planemos 56 Global Surveyor 56 WFPC2 56 ULP cepheids 56 coronal loop 56 interferometric technique 56 highly elliptical orbits 56 spectroscopic techniques 56 Solar Terrestrial Relations 56 BP Psc 56 Cepheid variable 56 kaons 56 circumstellar disk 56 GLAST telescope 56 planet magnetosphere 56 MARSIS 56 neutrino oscillation 56 lobate scarps 56 NASA Voyager spacecraft 56 Mossbauer spectrometer 55 infrared spectrums 55 Aqua satellite 55 Astrophysical 55 Hubble Space Telescopes 55 impactors 55 shorter wavelengths 55 Landsat satellite 55 flyby spacecraft 55 C1XS 55 CoRoT 9b 55 colliding galaxies 55 SPICAM 55 polarimeter 55 astronomical telescopes 55 Galilean satellites 55 aperture telescope 55 Moderate Resolution Imaging 55 Martian crater 55 impactor spacecraft 55 interstellar dust clouds 55 Solar Orbiter 55 Hubble Space Telescope 55 Observatory Very 55 orbited Jupiter 55 astronomical observatories 55 X ray Telescope 55 BLG #Lb 55 Churyumov Gerasimenko 55 super Earths 55 magnetic monopoles 55 NASA EPOXI mission 55 synchrotron x ray 55 cosmic gamma rays 55 Yinghuo 1 55 Philae lander 55 moons Phobos 55 superlens 55 ionise 55 sized planets orbiting 55 Antennae Galaxies 55 Small Magellanic Cloud 55 aurorae 55 Mini Thermal Emission 55 Solar Optical Telescope 55 auroral 55 Digitized Sky Survey 55 constellation Aquarius 55 Perseus Cluster 55 TerraSAR X 55 Earth magnetosphere 55 Wolszczan 55 blackbody 55 comet Lulin 55 moonlet 55 Pancam 55 Nasa Kepler 55 electron positron 55 Toutatis 55 moonlets 55 orbiting spacecraft 55 HiRISE images 55 astro comb 55 LROC 55 antiparticle 55 baryonic 55 Wolf Rayet star 55 Mossbauer 55 WISE spacecraft 55 orbiting 55 rocky planets 55 magnetospheres 55 Optical Gravitational Lensing Experiment 55 satellites orbiting Earth 55 Cherenkov radiation 55 Neutron Detector 55 NASA Infrared Telescope 55 Zeta Ophiuchi 55 spiral nebulae 55 solar nebula 55 NGC# 55 IRC +# 55 Extreme Ultraviolet Imaging Spectrometer 55 infrared photons 55 WIYN 55 Fornax cluster 55 PSR J# 55 Infrared Mapping Spectrometer VIMS 55 Titan flyby 55 NIRSpec 55 Andromeda Galaxy 55 orbiter Mars Odyssey 55 e MERLIN 55 supernova explosions 55 ESO La Silla 55 Cassini Huygens 55 planet orbits 55 Kuiper Belt objects 55 Einstein relativity theory 55 Mars orbiters 55 Kepler Mission 55 velocity dispersion 55 Moon Mineralogy Mapper M3 55 OMEGA instrument 55 UV wavelengths 55 Trojan asteroids 55 Bose Einstein condensates 55 Virgo cluster 55 polar mesospheric clouds 55 HD# [002] 55 Imaging Spectroradiometer MODIS instrument 55 X ray spectra 55 hypervelocity stars 55 NICMOS 55 NASA satellites orbiting 55 gradiometer 55 COBE satellite 55 Imaging Spectrograph 55 colliders 55 planetary orbits 55 Cassini orbiter 55 Cosmic Evolution 55 submillimeter wavelength 55 emit X rays 55 protoplanetary disk 55 NIRCam 55 observatories 55 photomultiplier tubes 55 X ray absorption spectroscopy 55 interstellar particles 55 UDFy # 55 P/# A2 55 Compton Gamma Ray 55 hematite mineral 55 GLAST Burst Monitor 55 maser 55 Proba 2 55 robotic explorer 55 Gal Yam 55 isotopic ratios 55 Shoemaker Levy 55 constellation Taurus 55 NASA ESA Hubble 55 supermassive 55 electron ion 55 ejecta 55 protoplanetary 55 SN #cr 55 NEOWISE 55 Neutron Spectrometer 55 helium ions 55 Planck spacecraft 55 Gamma ray bursts GRBs 55 Hubble orbits 55 supercomputer simulations 55 orbital rendezvous 55 Beta Pictoris 55 spectroscopy 55 airbursts 55 radial velocity method 55 particle analyzers 55 Gravitational lensing 55 planets atmospheres 55 Magellanic Stream 55 surface plasmons