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(Click for frequent words.) 61 HRTEM 60 Spectrograph 59 GALEX 57 Imaging Spectrometer 57 Interferometric 57 ACS WFC 56 ESO VLT 55 Mpc 55 photoelectron 55 multiwavelength 55 arcseconds 55 photometry 55 hyperspectral imager 55 HySI 54 SRTM 54 interferometric observations 54 ESO telescope 54 arcsec 54 Magnetic Imager HMI 54 astrometric 54 azimuthal 54 nm spectral 54 VLTI 54 SNe Ia 53 Keck Interferometer 53 spectral bands 53 interferometric 53 arcminutes 53 infrared spectra 53 collinear 53 Solar TErrestrial RElations Observatory 53 WFC3 53 spectro 53 Interferometer 53 #x magnification [002] 53 diffraction patterns 53 solar radii 53 infrared imager 52 mT 52 polarimeter 52 arcsecond 52 shortwave infrared 52 Helioseismic 52 coronagraph 52 Infrared Camera 52 Credits ESA 52 submillimeter wavelength 52 widefield 52 Multi Object Spectrograph 52 gravitationally lensed 52 Confocal 52 absorption spectra 52 millimeter wavelengths 52 WFPC2 52 spectroscopically 52 Uninhabited Aerial Vehicle 51 radiometry 51 spectrometric 51 spectral characteristics 51 spectrographs 51 #.#nm [002] 51 photon counting 51 spatial resolution 51 High Resolution Imaging 51 Keck telescopes 51 deformable mirrors 51 deconvolution 51 F#W 51 spectral radiance 51 Synthetic Aperture Radar SAR 51 monochromators 51 Multi Object Spectrometer 51 fainter objects 51 equatorial orbit 51 ultraviolet wavelength 51 Extragalactic 51 infrared wavelength 51 X ray absorption spectroscopy 51 CCD camera 51 Triangulum Galaxy 51 Spectroscopic 50 UV wavelengths 50 gamma ray observatories 50 Infrared Astronomical Satellite IRAS 50 arcmin 50 infrared spectrometers 50 ESA SMART 50 submillimeter 50 panchromatic 50 NICMOS 50 VIRTIS 50 synthetic aperture 50 AKARI 50 correlation spectroscopy 50 Near Infrared Camera 50 Hubble Space Telescope HST 50 multispectral imager 50 IR wavelengths 50 Gamma ray 50 Alpha Particle 50 imaging spectrometer 50 polarimetric 50 Spectrometers 50 THEMIS Image 50 confocal 50 X ray observatory 50 Cloud Aerosol Lidar 50 Descent Imager Spectral Radiometer 50 ENVISAT 50 UV spectroscopy 50 Submillimeter 49 TanDEM X 49 S/# [001] 49 Advanced LIGO 49 Magnetospheric 49 Mössbauer 49 Anisotropy 49 velocity dispersion 49 polarimetry 49 FOV 49 inelastic scattering 49 Satellites GOES 49 Synthetic Aperture Radar 49 ROSAT 49 Fornax 49 Orbiter MRO 49 NMR spectrometer 49 Convection Rotation 49 x ray microscopy 49 TerraSAR X 49 ultrahigh resolution 49 Faint Object 49 submillimetre 49 collimators 49 SQUIDs 49 FUV 49 MG J# +# 49 Solar Optical Telescope 49 fluorescence microscope 49 Astrophysical 49 Advanced Synthetic Aperture 49 jovian 49 LWIR 49 reflectometry 49 Surveys ACS 49 UV VIS 49 magnifications 49 Antenna LISA 49 Lyman alpha 49 EPOCh 49 NICMOS observations 49 optical wavelengths 49 Suzaku X ray 49 Femtosecond 49 Fourier transform 49 DIXI 48 Orbiter LRO 48 submillimetre wavelengths 48 ESA Planck 48 radiometers 48 EVLA 48 infrared telescopes 48 scanning electron microscope SEM 48 microquasar 48 IR LEDs 48 Saturnian moons 48 detect gamma rays 48 IBEX spacecraft 48 situ measurements 48 scanning electron microscopes 48 photometer 48 spatially resolved 48 XMM Newton X ray 48 Total Ozone Mapping 48 VISTA telescope 48 ESO PR 48 ESA XMM Newton 48 airglow 48 INTEGRAL 48 spectroscopic observations 48 illuminance 48 photomultiplier tubes 48 bolometer 48 spiral galaxy NGC 48 Spectroradiometer 48 LRO spacecraft 48 Raman spectra 48 QCLs 48 Photoacoustic 48 Area Telescope LAT 48 Submillimeter Array 48 spectroscopic measurements 48 ESA Envisat 48 Encke gap 48 detector arrays 48 linearly polarized 48 luminosities 48 absorption spectroscopy 48 Mini Thermal Emission 48 dI dV 48 Rosetta orbiter 48 aperture telescope 48 Shuttle Radar Topography 48 eclipsing binary 48 RESOURCESAT 47 LAGEOS 47 NASA Wilkinson Microwave 47 infrared interferometry 47 HARPS spectrograph attached 47 Pancam 47 Moderate Resolution Imaging 47 Ikonos 47 Relations Observatory STEREO 47 Hipparcos 47 Infrared Pathfinder Satellite 47 panchromatic camera 47 z ~ 47 collimated 47 Fig. 2A 47 photomultiplier tube 47 keV 47 Lunar Reconnaissance Orbiter Camera 47 SPIRE instrument 47 Lunar Laser Ranging 47 radio occultation 47 optical spectra 47 stellar occultation 47 Adaptive optics 47 J#.# [001] 47 Composite Infrared Spectrometer 47 Resolution Instrument 47 ε 47 orbiting gamma ray 47 imager 47 spiral galaxy Messier 47 τ 47 Active Galactic Nuclei 47 backscattering 47 photon flux 47 wavebands 47 interferograms 47 NuSTAR 47 astrophysical objects 47 Impactor 47 Planetary Camera 2 47 Fermi telescope 47 Trifid Nebula 47 solar corona 47 Ray Spectrometer 47 multiband imaging photometer 47 planetary surfaces 47 SNe 47 crustal thickness 47 Mars Orbiter Laser Altimeter 47 Planck satellite 47 submillimeter wavelengths 47 spectrographic 47 Neutral Mass Spectrometer 47 X ray spectrometer 47 galaxy NGC 47 WISE infrared 46 scanning optical microscopy 46 dimensional reconstructions 46 spectroscopic 46 Context Camera 46 J# +# [002] 46 UVIS 46 electron diffraction 46 OSIRIS 46 redshifts 46 magnetisation 46 UVOT 46 neutron spectrometer 46 Cassini flyby 46 multibeam 46 HD# [005] 46 Panoramic Camera 46 filamentary structure 46 Imaging Spectrograph 46 Mercury exosphere 46 LOFAR 46 Multispectral 46 SECCHI 46 ARPES 46 Infrared Thermal Imaging Spectrometer 46 Churyumov Gerasimenko 46 SINFONI 46 multispectral 46 Reflection Radiometer 46 Hubble Ultra 46 Thermal Emission 46 synthetic aperture radar 46 infrared spectrograph 46 Hubble Constant 46 APEX telescope 46 interferogram 46 VIRTIS instrument 46 Lunar Orbiter 46 LROC 46 X ray binary 46 Shepherding Spacecraft 46 COROT 46 Ly alpha 46 Lunar Reconnaissance Orbiter LRO 46 photometric 46 Landsat satellite 46 Envisat Medium Resolution 46 orbital resonance 46 retroreflector 46 Spitzer Infrared Array 46 Spectrometer 46 ultraviolet spectrograph 46 intrinsic brightness 46 ARGUS IS 46 Neutron Detector 46 ESO Very Large Telescope 46 wavelength infrared 46 bolometers 46 SDSS II 46 NASA Landsat 45 OGLE TR 45 interferometer 45 gamma ray emission 45 Earth orbiting satellites 45 NOAA GOES 45 laser altimeter 45 luminous galaxies 45 Titan flyby 45 Geminga 45 AVHRR 45 Evolution Explorer 45 magnetic radiometric 45 Aqua satellite 45 photoluminescence 45 X ray telescopes 45 CARTOSAT 45 radiative cooling 45 backscattered 45 radiometer 45 Thermal Emission Spectrometer 45 orbiting telescopes 45 Nasa Mars Reconnaissance 45 HiRISE camera aboard 45 AMIE camera 45 Z boson 45 waveband 45 infrared wavelengths 45 interferometry 45 XMM Newton satellite 45 confocal imaging 45 high redshift galaxies 45 interferometers 45 pointings 45 Sojourner Rover 45 ecliptic plane 45 orbiting observatories 45 irradiance 45 Jupiter magnetosphere 45 Mars Color Imager 45 Advanced Microwave Scanning 45 X ray wavelengths 45 Explorer WISE 45 STIS 45 Field Imager 45 confocal microscopes 45 spectra 45 HRSC 45 radial velocities 45 pulsed laser 45 InSAR 45 diffraction pattern 45 geosynchronous 45 Planck telescope 45 monochromator 45 Cosmic Evolution 45 spectroscopic analysis 45 Mars Orbiter Camera 45 single photon detectors 45 Cat Paw Nebula 45 spectral measurements 45 astrometry 45 deformable mirror 45 Aurigae 45 Cartosat 45 ESA Envisat satellite 45 electron density 45 Titan flybys 45 TerraSAR X satellite 45 Wilkinson Microwave Probe 44 Mars Pathfinder lander 44 Keck Telescope 44 occultations 44 photoemission 44 coronal 44 spacecraft orbiting 44 Great Observatories 44 NASA Interstellar Boundary 44 Oceansat 44 ChemCam 44 Envisat Advanced Synthetic Aperture 44 circumstellar 44 specular reflection 44 reflection nebula 44 gamma ray detectors 44 mK 44 distant quasar 44 multiphoton 44 Bug Nebula 44 scanning electron micrograph 44 WISE telescope 44 NASA MODIS 44 cantilever deflection 44 neutrino experiments 44 chlorophyll fluorescence 44 beamline 44 energetic electrons 44 JDEM 44 DISR 44 X ray observatories 44 Express orbiter 44 TNOs 44 blazar 44 Comet 9P/Tempel 1 44 Comet Halley 44 Dumbbell Nebula 44 WISE spacecraft 44 ESA ERS 44 gamma ray telescopes 44 photons emitted 44 Anisotropy Probe 44 ion thrusters 44 constellation Carina 44 X ray Telescope XRT 44 Mars CRISM 44 electron neutrinos 44 moonlet 44 XMM Newton 44 Imaging Spectroradiometer MODIS instrument 44 HiRISE image 44 auroral emissions 44 MPG ESO 44 aboard ESA Envisat 44 emitted photons 44 Resolution Imaging 44 Reflection Radiometer ASTER 44 Imaging Spectroradiometer 44 millisecond pulsar 44 supernova SN 44 X ray pulses 44 Ultraviolet Imaging Spectrograph UVIS 44 Comet Churyumov Gerasimenko 44 X ray emitting 44 Doppler measurements 44 gamma ray observatory 44 SIRTF 44 photolysis 44 relativistic particles 44 microlensing events 44 O OREOS 44 brightfield 44 HUDF 44 KAGUYA 44 RS Ophiuchi 44 Comet Hartley 2 44 infrared astronomy 44 AU Mic 44 Solar Dynamics Observatory 44 Comet Hartley 44 supergiant star 44 visible wavelengths 44 infrared imagery 44 ultraviolet wavelengths 43 NASA EPOXI mission 43 Galactic Plane 43 Saturn outermost 43 MERIS 43 aspherical 43 x ray scattering 43 Veil Nebula 43 Resolution Stereo Camera 43 elliptical galaxy NGC 43 Observatory SDO 43 Ultra Deep 43 BLG #L 43 Anisotropy Probe WMAP 43 confocal microscope 43 infrared ultraviolet 43 Observatory STEREO 43 Very Large Telescope 43 planetary Transits 43 redshift 43 Heterodyne Instrument 43 Io Europa 43 collimator 43 starburst galaxy 43 confocal microscopy 43 Rosette Nebula 43 obscuration 43 XMM Newton observations 43 tropospheric 43 optical microscopy 43 HESS telescopes 43 VLBA 43 detect gravitational waves 43 weak gravitational lensing 43 HII regions 43 speckle pattern 43 globular cluster M# 43 linear polarization 43 SPICAM 43 IP Resistivity 43 Ulysses spacecraft 43 NMR spectra 43 polarizing filters 43 Ocean Salinity SMOS 43 RXTE 43 SMOS 43 absorbance 43 Digitized Sky Survey 43 thermal infrared 43 NASA STEREO 43 ray Space Telescope 43 Huygens mission 43 spectrally 43 barred spiral galaxy 43 anisotropy 43 NFIRE satellite 43 SNR #-#.# 43 NEOWISE 43 Solar Orbiter 43 ESO telescopes 43 geosynchronous satellites 43 Candor Chasma 43 GRB# 43 ionospheric 43 cm -1 43 Great Observatories Origins 43 highly elliptical orbits 43 SN #A 43 diffraction 43 DEIMOS 43 X ray binaries 43 hyper spectral 43 Hubble orbits 43 Planetary Transits 43 DigitalGlobe WorldView 2 43 hyperspectral sensors 43 CoRoT satellite 43 distant quasars 43 electrical resistivity 43 twin STEREO spacecraft 43 WMAP satellite 43 x ray beam 42 Helix Nebula 42 spectrometer 42 dispersive 42 Live MOS sensor 42 CCD detectors 42 exoplanets orbiting 42 hexagonal mirrors 42 wavelengths 42 CIRS 42 KBOs 42 orbital eccentricity 42 Resolution Imaging Spectrometer 42 Cometary 42 muon neutrinos 42 GROND 42 e MERLIN 42 NASA QuikScat satellite 42 lightwaves 42 blackbody 42 prograde 42 HiRISE camera 42 stellar occultations 42 photon detector 42 brightnesses 42 Mars Orbiter 42 Mimas 42 optical microscope 42 galaxy M# [002] 42 RRATs 42 TappingMode 42 cosmological parameters 42 STEREO spacecraft 42 Delta Cephei 42 gravitational lenses 42 SIM PlanetQuest 42 interplanetary spacecraft 42 HD# [002] 42 extrasolar planetary systems 42 sub millimeter wavelengths 42 Clementine spacecraft 42 moon Io 42 electromagnetic EM 42 ultrashort pulses 42 extrasolar planetary 42 electron flux 42 Kuiper Belt Objects 42 highly elliptical orbit 42 LCROSS Centaur impact 42 gamma ray burst GRB 42 Hubble observations 42 shorter wavelengths 42 Saturn Cassini 42 Cassini flybys 42 wavefront 42 Deep Impact eXtended Investigation 42 transiting exoplanets 42 DigitalGlobe WorldView 42 LORRI 42 Microlensing 42 Lagoon Nebula 42 Rosetta spacecraft 42 CoRoT 41 auroral 41 heliospheric 41 SOHO spacecraft 41 GOCE 41 reflectance 41 PSR J# 41 Small Magellanic Cloud 41 Cosmic Origins Spectrograph COS 41 interacting galaxies 41 evanescent waves 41 Ring Nebula 41 Triangulum 41 Delfi C3 41 HiRISE 41 lunar crust 41 circumstellar disk 41 CRISM 41 constellation Centaurus 41 orbiter Mars Odyssey 41 SeaWiFS 41 Cepheid variables 41 magnetic electromagnetic 41 radar interferometry 41 foreground galaxy 41 SMEX 41 nebular 41 IKONOS satellite imagery 41 blazars 41 Virgo Cluster 41 Mars Reconnaissance Orbiter MRO 41 beam splitter 41 laser pulses 41 Spitzer infrared 41 spectroscope 41 exoplanetary 41 Saturn magnetosphere 41 THEMIS satellites 41 Coma Cluster 41 rubidium vapor 41 HM Cancri 41 THEMIS Images 41 Envisat satellites 41 Resourcesat 41 colloidal crystals 41 gamma rays emitted 41 fig. S2 41 Kuiper belt objects 41 Infrared Array Camera 41 Hubble Near Infrared 41 MODIS instrument 41 ionised gas 41 NASA Far Ultraviolet 41 SNfactory 41 #mm telephoto lens 41 microscopic imager 41 asteroid Steins 41 Epsilon Eridani 41 Fermi Gamma ray 41 moonquakes 41 Hubble Space 41 galactic disk 41 faint galaxies 40 Viking Lander 40 Enceladus flyby 40 magnetospheric 40 Deep Field HUDF 40 sunlike stars 40 synchrotron x ray 40 spectroscopy 40 Milky Way halo 40 baryon 40 Galileo spacecraft 40 toroid 40 spectral 40 APXS 40 MODIS 40 Global Surveyor spacecraft 40 extragalactic 40 Cosmic Microwave Background 40 terahertz waves 40 GOSAT 40 laser altimetry 40 polar orbiting satellites 40 INMS 40 Mars orbiting spacecraft 40 Keck telescope 40 POES satellites 40 distant galaxy clusters 40 Servicing Mission 40 Earth radii 40 neutron beams 40 Earth ionosphere 40 orbiting Chandra 40 metallicity 40 JWST 40 Spitzer infrared spectrograph 40 nanosecond pulses 40 Upsilon Andromedae 40 thermally induced 40 starboard SARJ 40 sized planets orbiting 40 fluorophores 40 Interior Laboratory GRAIL 40 Tempel Tuttle 40 THEMIS 40 UVES 40 ionized gases 40 ASAR 39 gaseous planet 39 particle analyzers 39 beamsplitter 39 Krimigis 39 inhomogeneities 39 NASA Cassini 39 NASA CloudSat 39 moon Mimas 39 NASA WMAP 39 Cosmic Origins Spectrograph 39 Hinode spacecraft 39 satellites orbiting Earth 39 Extrasolar Planet Search 39 Fomalhaut b 39 irregularly shaped asteroid 39 magnetotail 39 gravitational lensing 39 galaxy M# [001] 39 deorbiting 39 Science Experiment HiRISE 39 Resourcesat 2 39 Advanced Spaceborne Thermal Emission 39 giant elliptical galaxy 39 lensing galaxy 39 Reiner Gamma 39 magnetoresistance 39 WM Keck Observatory 39 photosphere 39 VY Canis Majoris 39 AGNs 39 NASA Stardust spacecraft 39 Satellite GOES 39 ultraviolet spectrometer 39 distant supernovae 39 binary asteroid 39 Herbig Haro 39 neutrino particles 39 distant supernovas 39 Andromeda halo 39 cosmological distances 39 Red Rectangle 39 Imaging Spectroradiometer MODIS 39 Microscopic Imager 39 Galaxy Evolution 39 CALIPSO 39 Saturnian moon 39 gravitational lens 39 Eagle Nebula 39 galaxy cluster 39 noctilucent clouds 39 liquid crystal molecules 39 scatterometer 39 dipolar 39 orbiting Hubble Space Telescope 39 CMB radiation 39 orbits 39 circumstellar disks 39 photon pairs 39 Comet Lulin 38 NGC #A 38 Infrared Astronomical Satellite 38 planetary transits 38 NASAs 38 adaptive optics 38 Doppler shifts 38 icy moons 38 lunar craters 38 astrophysical phenomena 38 noctilucent 38 Moderate Resolution 38 Extrasolar Planet Observation 38 Hubble Space telescope 38 exoplanet orbiting 38 galactic cosmic rays 38 Viking orbiters 38 Saturn auroral 38 planetary nebulae 38 Seyfert galaxies 38 radial velocity 38 RHESSI 38 Gamma ray burst 38 Martian rovers 38 HETE 38 NASA Cassini spacecraft 38 interstellar dust grains 38 GRB #B 38 X ray emission 38 coronal holes 38 merging galaxies 38 gravitational radiation 38 distant galaxies 38 Comet #P/Churyumov-Gerasimenko 38 active galactic nuclei 38 millisecond pulsars 38 GOES satellites 38 PUVA psoralen plus 38 Shoemaker Levy 38 GOES O 38 Guidance Sensor 38 cometary material 38 Tropical Rainfall Measuring 38 cosmic phenomena 37 earthlike planets 37 exoplanets planets 37 galaxy redshift 37 Heliospheric Observatory SOHO 37 Horsehead Nebula 37 THEMIS spacecraft 37 Wilkinson Microwave Anisotropy Probe 37 Herschel telescope 37 ESA Mars 37 Super Earths 37 ESA Proba 37 Enceladus flybys 37 Carina constellation 37 Astrophysical Journal Supplement 37 extrasolar 37 optical telescopes 37 GRB # 37 Europa Orbiter 37 Higgs bosons 37 Zeta Ophiuchi 37 Saturn moon Enceladus 37 helium nuclei 37 Orion Nebula 37 NEAs 37 flyby 37 TrES 37 SM4 37 Mercury magnetosphere 37 Burst Alert 37 YORP effect 36 planets orbits 36 Spectroscopic Explorer 36 GJ #b [002] 36 Andromeda galaxy 36 AB Aurigae 36 volcanic moon Io 36 shepherding spacecraft 36 Epsilon Aurigae 36 proplyds 36 spacecraft flyby 36 ultraviolet imaging spectrograph 36 Hinode 36 NASA ESA Hubble 36 microlensing 36 #P/Holmes 36 intracluster 36 Comet Holmes 36 Mastcam 36 accretion disks 36 liquid coolant 36 gamma ray flares 36 globular cluster 36 Dynamics Observatory 36 flybys 36 transiting planet 36 coronal loops 36 Orionid 36 Orionid meteors 36 Voyager spacecraft 36 eclipsing binaries 36 Mini TES 36 XMM Newton observatory 36 OGLE 36 astronomical objects 36 polar vortex 36 planetary missions 36 X ray afterglow 35 TRMM satellite 35 flyby spacecraft 35 origins spectrograph 35 panoramic camera 35 Space Telescope 35 GLAST telescope 35 celestial object 35 diffuse aurora 35 Cassini 35 zodiacal light 35 spacecraft 35 comet nucleus 35 Spitzer Space Telescope 35 Planck 35 afterglows 35 sun corona 35 NASA Lunar CRater 35 Cosmic Microwave Background CMB 35 Mercury flyby 35 interstellar grains 35 X ray Observatory 35 Mars Reconnaissance Orbiter 35 orbiting spacecraft 35 Sensing Satellite LCROSS 35 Envisat 35 chondrites 35 exo planets 35 redshifted 35 Bullet Cluster 34 Dalcanton 34 Swift Ultraviolet Optical 34 orbited Jupiter 34 planetary nebula 34 Jovian moons 34 Saturn rings 34 Viking landers 34 comets orbiting 34 MESSENGER 34 X ray telescope 34 STEREO observatories 34 P/# A2 34 GRB #A 34 Nasa spacecraft 34 nebulae 34 ejecta 34 earthshine 34 transiting planets 34 celestial phenomena 34 telescope 34 Orbiter 34 Viking Orbiter 34 comet Hartley 2 34 Galilean satellites 33 flyby Cassini 33 Global Surveyor 33 extrasolar planets orbiting 33 NASA LCROSS 33 astrophysical 33 supernova remnant 33 type Ia supernovae 33 Mars orbiter 33 axions 33 V# Mon 33 orbiting Hubble telescope 33 star Gliese 33 Landsat 33 sunlike star 33 WMAP 32 gamma ray burst 32 Helix nebula 32 novae 32 galactic cosmic ray 32 GRBs 32 orbiting Mars 32 planets orbiting 32 Advanced Camera 32 Trojan asteroids 32 Hubble Telescope 32 Hubble Space Telescope 32 Cassini Huygens spacecraft 32 Field Planetary Camera 32 dwarf galaxy 32 brown dwarfs 31 planet orbiting 31 Interstellar Boundary Explorer 31 dwarf galaxies 31 Noctilucent clouds 31 thermal emission spectrometer 31 globular clusters 31 starquakes 31 Type Ia supernovae 31 Hubble telescope 31 interstellar dust 30 Deep Impact comet 30 orbiting telescope 30 OGLE TR #b 30 Hubble 30 NASA Chandra 30 Mars Global Surveyor 30 gamma ray bursts 28 waxing gibbous moon 28 cosmic rays 28 orbiting observatory 27 ULP cepheids 27 orbiters 26 comet 26 Hubbles