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(Click for frequent words.) 69 Earth ionosphere 69 ionospheric 66 magnetosphere 66 troposphere 65 galactic cosmic rays 63 mesosphere 63 solar corona 62 Earth magnetosphere 62 magnetic fields 62 cosmic ray 62 auroral 60 magnetotail 60 exosphere 60 photosphere 60 cosmic rays 60 tropospheric 60 cosmic ray particles 59 polar vortex 59 Saturn magnetosphere 59 martian atmosphere 59 tropopause 58 magnetic reconnection 58 CMB radiation 58 electron density 58 interstellar medium 58 upper troposphere 58 solar flares 58 magnetospheric 58 geomagnetic 58 planet magnetosphere 58 Rossby waves 58 airglow 58 heliosphere 58 auroras 57 sodium atoms 57 jovian 57 Ulysses spacecraft 57 electromagnetic 57 ejecta 57 substorm 57 sunspot activity 57 heliospheric 57 chromosphere 57 Jupiter magnetosphere 57 geomagnetic activity 57 X ray emission 57 infrared radiation 56 volcanic plumes 56 thermosphere 56 heliosheath 56 gravitational waves 56 atmospheric disturbances 56 X ray wavelengths 56 planetary orbits 56 stellar occultation 55 geomagnetic storms 55 Cosmic rays 55 meteoroid 55 gravitational wave 55 geomagnetic field 55 coronal loops 55 atmospheric turbulence 55 cosmic ray flux 55 coronal mass ejections CMEs 55 visible wavelengths 55 solitons 55 Earth orbiting satellites 55 dipole moment 55 ionized particles 55 starquakes 55 cometary debris 55 galactic disk 55 noctilucent clouds 55 comet nucleus 55 radiative 54 atmospheric aerosols 54 radar interferometry 54 cosmological distances 54 Martian atmosphere 54 laser pulses 54 ESO VLT 54 shorter wavelengths 54 energetic electrons 54 gamma rays 54 metallicity 54 X ray pulses 54 interplanetary spacecraft 54 rotational axis 54 photochemical reactions 54 GZK cutoff 54 highly elliptical orbits 54 optical wavelengths 54 ultraviolet wavelengths 54 stellar seismology 54 scatterometer 54 cosmic microwave radiation 54 coronal mass ejections 54 submillimeter 54 convective 54 gravitational radiation 54 RS Ophiuchi 54 Cosmic Microwave Background 54 atmospheric 54 elliptical orbits 54 APXS 54 THz radiation 53 electromagnetic waves 53 Earth magnetotail 53 cosmic microwave background 53 Oort Cloud 53 Ionosphere 53 meteoroids 53 Infrared Pathfinder Satellite 53 mantle plumes 53 substorms 53 aurorae 53 gravitational lensing 53 HD#b 53 Galileo spacecraft 53 cosmic ray intensity 53 geosynchronous orbit 53 polarimetry 53 cirrus cloud 53 Venusian atmosphere 53 aerosol particles 53 accretion disk 53 Pluto Charon 53 gamma ray flashes 53 KBOs 53 relativistic particles 53 Earth radii 53 magnetopause 53 Martian dust 53 microwave radiation 53 cirrus clouds 53 cosmic radiation 53 Cassini ion 53 Upsilon Andromedae 53 frequency VLF 53 accretion disks 53 millimeter wavelength 53 Huygens spacecraft 53 MARSIS radar 53 exoplanetary 53 CoRoT satellite 52 water vapor 52 MARSIS 52 vorticity 52 phonon 52 radiosondes 52 hydrosphere 52 ionized gas 52 INMS 52 hypersonic speeds 52 Saturn rings 52 detect gravitational waves 52 seismic waves 52 elongated orbits 52 post perovskite 52 spacetime 52 NEAs 52 radial velocity 52 heliopause 52 solar irradiance 52 microphysical 52 interferometry 52 occultation 52 infrared astronomy 52 particle acceleration 52 infrared wavelengths 52 magnetic excitations 52 COROT 52 oscillations 52 moon Mimas 52 magnetic polarity 52 astrometry 52 Planck satellite 52 retrograde orbit 52 interstellar dust 52 meridional flow 52 stratospheric ozone 52 auroral activity 52 Yarkovsky effect 52 Gravitational waves 52 Alfven waves 52 gamma ray emission 52 celestial sphere 52 plasmons 52 ecliptic plane 52 Solar flares 52 orbiting gamma ray 52 moon Io 52 SOHO spacecraft 52 orbits 52 gravitational interaction 52 comets asteroids 51 infrared wavelength 51 Saturn moon Enceladus 51 GRB# 51 planets orbits 51 moon Enceladus 51 comet 51 high redshift galaxies 51 CMEs 51 magma ocean 51 interferometer 51 Doppler shifts 51 velocity dispersion 51 downwelling 51 auroral displays 51 icy moons 51 dipole 51 electromagnetic spectrum 51 terahertz waves 51 gamma ray burst 51 lightwaves 51 photons 51 latitudes 51 distant galaxies 51 phonons 51 mid latitudes 51 plasmasphere 51 Mercury exosphere 51 photometry 51 lowermost mantle 51 occultations 51 planetary atmospheres 51 highly elliptical orbit 51 polar regions 51 silicon monoxide 51 dipolar 51 circumstellar 51 C NOFS 51 ionised 51 GALEX 51 interstellar particles 51 radiometers 51 surface plasmons 51 backscattered 51 spectral fingerprint 51 diffracted 51 stellar occultations 51 TGFs 51 Jupiter moon Io 51 surface plasmon 51 X ray spectrometer 51 quantum tunneling 51 quasars 51 magnetization 51 aboard ESA Envisat 51 galactic magnetic 51 astrophysical 51 protoplanetary disk 51 Voyager spacecraft 51 anisotropy 51 Keck telescope 51 Cabeus crater 51 moonquakes 51 ionised gas 51 Milankovitch cycles 51 magnetic flux 51 exciton 51 Magnetic Imager HMI 51 Nasa spacecraft 51 comet Tempel Tuttle 50 ringed planet 50 plasmon 50 gravitational slingshot 50 SIRTF 50 elliptical orbit 50 Corot 9b 50 quasar 50 axial tilt 50 crustal 50 Gamma rays 50 atmospheric circulation 50 superfluid 50 electromagnetic flux 50 CALIPSO 50 basaltic rocks 50 Comet Hartley 2 50 outer planets 50 planetary Transits 50 electromagnetic signals 50 oceanic circulation 50 Solar System 50 midlatitudes 50 linearly polarized 50 telescopic observations 50 RHESSI 50 longwave radiation 50 laser altimeter 50 coronal mass ejection 50 EPOCh 50 laser pulse 50 Composite Infrared Spectrometer 50 coronal hole 50 extrasolar planetary systems 50 atmospheric chemistry 50 magnetar 50 interferometers 50 elongated orbit 50 gravitational 50 advection 50 resonance frequency 50 subsurface ocean 50 electrical currents 50 aurora 50 Comet 9P/Tempel 1 50 soundwaves 50 fainter objects 50 Cosmic Background Explorer 50 Spectrograph 50 terahertz radiation 50 gravitational pulls 50 lunar perigee 50 WASP #b 50 millimeter wavelengths 50 extrasolar 50 albedo reflectivity 50 ARPES 50 supernova remnant 50 carbonate minerals 50 infrared spectral 50 photometer 50 Epsilon Eridani 50 galactic cosmic ray 50 lunar surface 50 photoemission 50 GJ #b [002] 50 coronal loop 50 interferometric synthetic aperture radar 50 RXTE 50 Madden Julian Oscillation 50 VIRTIS 50 electrons 50 interferometric 50 corona 50 Anisotropy Probe 50 orbital 49 stratosphere 49 XMM Newton 49 geosynchronous 49 helium atoms 49 Cassini 49 Itokawa 49 ionise 49 Rayleigh scattering 49 excitons 49 magnetic dipole 49 NGC #A 49 microwave frequencies 49 dipoles 49 UV photons 49 frequency electromagnetic waves 49 rubidium vapor 49 polar orbiting satellites 49 infalling 49 ionize 49 frequency electromagnetic 49 starlight 49 Saturn aurora 49 Planetary Transits 49 backscattering 49 dynamical 49 geostationary satellite 49 attosecond 49 irradiance 49 redshift 49 Epsilon Aurigae 49 vortices 49 diffuse aurora 49 Magnetospheric 49 bandgap 49 situ measurements 49 Astrophysical 49 Raman scattering 49 coronal holes 49 comets orbiting 49 ADM Aeolus 49 extragalactic 49 Kuiper belt objects 49 planetary nebulae 49 SINFONI 49 Earth orbit 49 vibrational 49 binary asteroid 49 spectroscopic analysis 49 GJ#b 49 mesospheric 49 blazar 49 cosmic gamma rays 49 Saturnian moon 49 gamma ray observatory 49 albedo 49 EarthScope 49 gravity warps 49 asteroseismology 49 diffract 49 solar nebula 49 gaseous envelope 49 ultracold atoms 49 comets 49 lensing galaxy 49 cometary 49 Doppler shift 49 Shackleton crater 49 CMB photons 49 ionized plasma 49 orbital inclination 49 perihelion 49 X ray emitting 49 Mössbauer 49 cryosphere 49 diffusive 49 gaseous planet 49 polaritons 49 Neutron Detector 49 radiative transfer 49 sunspot cycle 49 magnetic monopoles 49 electrical resistivity 49 AMSR E 49 polarimetric 49 atmospheric oceanic 49 neutral mass spectrometer 49 active galactic nuclei 49 Kuiper Belt Objects 49 upper tropospheric 49 astrophysical phenomena 49 moonlets 49 impactors 49 STEREO spacecraft 49 Shepherding Spacecraft 49 radar altimetry 49 Comet Hartley 49 cometary dust 49 diffraction patterns 49 magnetic 49 volcanic aerosols 49 moonlet 49 Saturn auroras 49 jet stream 49 circular orbits 49 electron electron 49 convective clouds 49 amplitudes 49 Comet Tempel Tuttle 49 intrinsic brightness 49 galaxy redshift 49 sun irradiance 49 sunspots 49 geodynamic 49 synchronous orbit 49 Type Ia supernovas 49 Ionospheric 49 Geomagnetic 49 Ranging MESSENGER spacecraft 49 collisional 49 ITCZ 48 protostar 48 atmospheric phenomena 48 GRB #B 48 Enceladus 48 circumstellar disks 48 LOFAR 48 astronomical objects 48 hydrologic cycle 48 AGNs 48 gravitational lens 48 gravitational keyhole 48 wavefronts 48 J# +# [002] 48 sulfate aerosol 48 Eta Carinae 48 meridional 48 tidally 48 noctilucent cloud 48 electron neutrinos 48 HD# [002] 48 femtosecond pulses 48 weakly interacting 48 IBEX spacecraft 48 planetary astronomer 48 chondrules 48 cm -1 48 Magellanic Clouds 48 Oort cloud 48 Saturnian 48 HF propagation 48 Huygens descent 48 deep convective clouds 48 lunar crater 48 Fomalhaut b 48 Polar Vortex 48 sulphate particles 48 interstellar dust clouds 48 blazars 48 atmospheric circulations 48 geosynchronous satellites 48 ballistic trajectory 48 magma chambers 48 geostationary orbits 48 RRATs 48 sun corona 48 Geomagnetic storms 48 ionospheric disturbances 48 HII regions 48 foreground galaxy 48 hypervelocity 48 planet HD #b 48 superluminal 48 sulphate aerosols 48 De Pontieu 48 interstellar space 48 Saharan dust 48 prograde 48 Doppler measurements 48 Agulhas Current 48 quasiparticle 48 Saturnian moons 48 Quadrantid 48 detect gamma rays 48 absorbs photons 48 Saturnian moon Titan 48 de Pater 48 helium ions 48 mesoscale 48 eclipsing binary 48 geo stationary orbit 48 aerosols 48 NASA Wilkinson Microwave 48 Geminga 48 heavily cratered 48 afterglows 48 Orionids 48 numerical simulations 48 gamma ray flares 48 dopants 48 Cloud Aerosol Lidar 48 cosmic strings 48 gradiometer 48 coronal heating 48 YORP effect 48 geomagnetic storm 48 HARPS spectrograph attached 48 electron 48 wavelength infrared 48 AB Aurigae 48 evanescent waves 48 SNR #-#.# 48 wavelengths 48 orbiting satellites 48 inhomogeneous 48 polar orbit 48 Adaptive optics 48 radiative cooling 48 GeV 48 circular polarization 48 microcavity 48 circumstellar disk 48 Hellas Basin 48 spherically symmetric 48 lunar crust 48 satellites 48 Photons 48 Keck Telescope 48 Cepheids 48 Cancri e 48 sulfate aerosols 48 luminous galaxies 48 Crab Pulsar 48 electromagnetic EM 48 Evolution Explorer 48 oscillation frequency 48 Saturnian system 48 Alycia Weinberger 48 CloudSat 48 blue supergiant 48 R Coronae Borealis 48 microquasar 48 Terahertz radiation 48 hydroxyl molecules 48 cryovolcanism 48 sulfur isotope 48 geomagnetism 48 periodic dimming 48 electromagnetic radiation 48 Comet Halley 48 cyclonic circulations 48 comet tail 48 proto planetary disk 48 Martian surface 48 magnetic substorms 48 lithosphere 48 GRBs 48 Mercury magnetosphere 48 muon 48 reflection nebula 48 ultraviolet radiation emitted 48 optical spectra 48 compressional 48 auroral oval 48 coronal 48 perigee 48 Southern Annular Mode 48 electron pairs 48 equatorial latitudes 47 Manned missions 47 Orionid 47 spectroscopic measurements 47 Relations Observatory STEREO 47 Gamma ray 47 infrared observatory 47 NASA QuikScat satellite 47 Carina constellation 47 Herbig Haro 47 Kelvin Helmholtz 47 Higgs bosons 47 sunspot 47 Cherenkov radiation 47 wavefunction 47 Solar TErrestrial RElations Observatory 47 surface plasmon polariton 47 Io volcanoes 47 Richard Mushotzky 47 soliton 47 distant supernovae 47 Fermi LAT 47 nebular 47 magmas 47 Saturn outermost 47 earth orbiting satellites 47 waveguide 47 QCLs 47 radiosonde 47 pulsating aurora 47 interstellar magnetic 47 interannual variability 47 smoggy atmosphere 47 X ray observatory 47 earthshine 47 meteorite impacts 47 thermal infrared 47 laser beams 47 planet Uranus 47 mantle convection 47 X ray observatories 47 tholins 47 moon gravitational pull 47 mT 47 constellation Perseus 47 electromagnetic pulses 47 Interstellar Boundary Explorer 47 lattice vibrations 47 galaxy clusters 47 protoplanetary disks 47 electron diffusion 47 subglacial 47 silicates 47 Fermi telescope 47 gamma rays emitted 47 terahertz frequencies 47 photoelectron 47 quantum particle 47 NASA Cassini spacecraft 47 polar 47 orbital resonance 47 Kuiper belt object 47 periodic oscillations 47 cometary material 47 cosmological parameters 47 elliptical galaxy 47 Advanced Microwave Scanning 47 twin STEREO spacecraft 47 spacecraft 47 X ray telescopes 47 planetary magnetospheres 47 sunspot numbers 47 hydrological cycle 47 exo planets 47 Reiner Gamma 47 EPOXI 47 submillimeter wavelengths 47 Methone 47 terrestrial planets 47 gravitationally 47 infrasound 47 nightside 47 orbiting spacecraft 47 obscuration 47 Comet Lulin 47 astrophysical objects 47 mineralogical composition 47 Laser beams 47 comet orbit 47 insolation 47 quantum oscillations 47 distant quasars 47 Helioseismic 47 excitations 47 VHE gamma rays 47 luminosities 47 optical lattice 47 photon 47 obliquity 47 interferogram 47 interstellar clouds 47 O OREOS 47 Mpc 47 spherical halo 47 spicules 47 Rydberg atoms 47 Saturn Enceladus 47 radial velocity method 47 electron diffraction 47 coronagraph 47 ESA Envisat satellite 47 infall 47 neutron spectrometer 47 HIRES spectrometer 47 HD #b [002] 47 W bosons 47 bilayer graphene 47 RPWS 47 temperature gradient 47 Titan flyby 47 photoluminescence 47 MIT planetary scientist 47 isotropic 47 galaxy cluster 47 galaxies 47 toroid 47 Southern Oscillation 47 Gravity Probe 47 galactic alignment 47 bolometer 47 TrES 4 47 Helios 2B 47 geomagnetic disturbances 47 chlorine monoxide 47 keV 47 infrared laser beam 47 cometary nucleus 47 electron positron pairs 47 antimatter particles 47 infrared spectra 47 albedo feedback 47 quantum particles 47 gravitational tides 47 exoplanetary systems 47 CALIPSO satellites 47 permanently shadowed craters 47 Sromovsky 47 infrared spectroscopy 47 neutron radiation 47 electron scattering 47 infra red radiation 47 synthetic aperture radar 47 synchrotron emission 47 Convection Rotation 47 muon neutrinos 47 ESO telescope 47 innermost planet 47 Red Rectangle 47 spacecraft flyby 47 interstellar boundary 47 Long Wavelength Array 47 orbital eccentricity 47 planetary surfaces 47 Earth orbit LEO 47 θ 47 CoRoT 47 permanently shadowed 47 QuikSCAT 47 zodiacal light 47 Samuel Oschin Telescope 47 metallic nanostructures 47 e MERLIN 47 celestial object 47 lavas 47 baryon 47 UVIS 47 Jovian moons 47 terahertz frequency 47 Nernst 47 Keck Interferometer 47 HiRISE camera aboard 47 millisecond pulsar 47 dust devils 47 polar caps 47 Telescope BAT 47 Jenniskens 47 galaxy formation 47 ULIRGs 47 Don Gurnett 47 nonlinear optical 47 Antenna LISA 47 periodicities 47 thermal gradients 47 Mott insulator 47 Haumea 47 supercooled liquid 47 multi decadal 47 Amundsen Sea 46 interstellar distances 46 gamma ray energies 46 Valles Marineris 46 Moessbauer 46 diffraction pattern 46 infrared telescopes 46 Moon Mineralogy Mapper M3 46 vibrational frequency 46 ephemeris 46 UVOT 46 Delta Cephei 46 Jupiter Ganymede 46 radiometer 46 Total Ozone Mapping 46 Antarctic Dry Valleys 46 ionisation 46 total solar irradiance 46 Encke gap 46 electron flux 46 Gamma ray burst 46 NOAA GOES 46 protoplanet 46 wavelength 46 flood basalts 46 icy comets 46 starburst galaxy 46 redshifted 46 Uranus 46 gravitational lenses 46 antineutrinos 46 constellation Centaurus 46 ejecta blanket 46 supersymmetric particles 46 geo synchronous 46 cosmic ray protons 46 orbit GEO 46 THEMIS satellites 46 supernova explosion 46 Bose Einstein condensates 46 Martian polar 46 supercurrent 46 Heliospheric Observatory SOHO 46 retroreflector 46 constellation Virgo 46 azimuthal 46 V# Mon 46 hydrothermal fluids 46 P/# A2 46 antiferromagnetic 46 ion thrusters 46 NASA THEMIS 46 ionized 46 infrared 46 thruster firings 46 conductance 46 pions 46 Microlensing 46 quantum mechanical 46 stratospheric clouds 46 Rydberg atom 46 westerly trough 46 auroral emissions 46 gluon 46 geosynchronous Earth 46 equatorial 46 ionization 46 x ray beam 46 polariton 46 InSAR 46 conductivity 46 celestial mechanics 46 gravitational redshift 46 Comet Hale Bopp 46 magnetic monopole 46 Mars Odyssey 46 polar mesospheric clouds 46 barometric pressures 46 Hanny Voorwerp 46 Very Large Array 46 oppositely directed 46 extrasolar planet 46 gravitational tugs 46 velocities 46 Gliese #c 46 meteoroid impacts 46 submillimeter wavelength 46 polar latitudes 46 reflectance spectroscopy 46 ferromagnet 46 brightnesses 46 convection currents 46 particle beam 46 ultraviolet imaging spectrograph 46 Mini TES 46 supergiant star 46 redshifts 46 volcanism 46 Jupiter Uranus 46 Fig. 1a 46 circularly polarized light 46 Aurigae 46 orbit 46 vibrational modes 46 electronic excitations 46 magnetization reversal 46 constellation Aquarius 46 electron beams 46 diffraction 46 Auroral 46 superconducting 46 numerical simulation 46 spherules 46 Explorer WISE 46 transiting planet 46 NASA Cassini 46 irregularly shaped asteroid 46 graphite whiskers 46 LADEE 46 pulsar 46 Mandushev 46 Kuiper Belt 46 thermodynamic equilibrium 46 equatorial orbit 46 Halley comet 46 X ray binaries 46 NASA Far Ultraviolet 46 microlensing 46 nanomesh 46 Uninhabited Aerial Vehicle 46 NASA STEREO 46 ESA SMART 46 ESA Cluster 46 celestial equator 46 Churyumov Gerasimenko 46 solar prominences 46 Submillimeter Array 46 geoneutrinos 46 galaxy 46 photon energies 46 isotherm 46 Cepheid variable 46 ENVISAT 46 inhomogeneities 46 Pegasi 46 THEMIS 46 comet Hale Bopp 46 Wilkinson Microwave Probe 46 Saturn moon Mimas 46 gaseous planets 46 excitation 46 Alfvén waves 46 picosecond 46 martian meteorites 46 Orion Nebula 46 WFPC2 46 hyperfine 46 Mars Odyssey spacecraft 46 solar minima 46 exoplanet 46 colloidal crystals 46 noctilucent 46 Cosmic ray 46 ENAs 46 resonant frequency 46 masers 46 X ray Spectrometer 46 lunar equator 46 planet orbits 46 infrared spectrograph 46 Maria Zuber 46 gamma ray bursts 46 crustal thickness 46 Measuring Mission TRMM 46 Fermi Gamma ray 46 magnetisation 46 planetary nebula 46 orbiting telescope 46 reionization 46 arcminutes 46 supernova remnants 46 waveguides 46 electron orbits 46 microscale 46 asteroid 46 circular orbit 46 ultrashort pulses 46 RAINEX 46 tropical troposphere 46 ionized gases 46 heavy fermion 46 Avishay Gal Yam 46 Earthward 46 equator 46 impactor