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(Click for frequent words.) 75 sunspots 66 sunspot numbers 66 sunspot cycle 63 geomagnetic activity 62 auroral 61 X ray emission 60 sunspot activity 60 substorm 60 Sunspot 59 magnetar 59 supernova remnant 59 Quadrantids 58 gamma ray burst 58 Ulysses spacecraft 58 polar vortex 58 N#E# 58 Lyrids 57 geomagnetic indices 57 GRB # 57 galaxy cluster 57 geomagnetic storm 57 solar corona 57 aurora 57 GRB #B 57 photosphere 57 coronal mass ejection 57 red supergiant 56 Comet Holmes 56 elliptical galaxy 56 solar minima 56 Fomalhaut b 56 solar flares 56 Maunder Minimum 55 periodicities 55 Quadrantid meteor shower 55 constellation Aquarius 55 geomagnetic 55 quasar 55 cosmic ray 55 S#W# 55 predicted smoothed sunspot 55 constellation Virgo 55 constellation Cassiopeia 55 Gliese #g 55 solar irradiance 54 SOHO spacecraft 54 magnetic polarity 54 galaxy NGC 54 planetary nebula 54 coronal hole 54 noctilucent clouds 54 CoRoT satellite 54 Eta Carinae 54 eruptive activity 54 WASP #b 54 SN #gy 54 supernovae 54 coronal holes 54 transiting planets 54 gamma ray emission 54 X ray afterglow 54 planet Uranus 54 gaseous planet 54 spiral galaxy NGC 54 extrasolar planet 54 Earth magnetosphere 54 geomagnetic field 54 Sunspots 54 Comet Lulin 54 Halley comet 53 millisecond pulsar 53 celestial sphere 53 zodiacal light 53 constellation Centaurus 53 Orion Nebula 53 Geminid shower 53 Lyrid meteor shower 53 starburst galaxies 53 XMM Newton 53 Hubble observations 53 auroral activity 53 Upsilon Andromedae 53 supernova 53 Comet NEAT 53 Kepler #b 53 Epsilon Aurigae 53 Maunder minimum 53 exoplanet 53 chromosphere 53 Orionids 53 fissure eruption 53 RHESSI 53 sunspot cluster 53 novae 53 Type Ia supernova 53 CoRoT 7b 53 sunlike stars 53 Perseids 53 supergiant star 53 Beta Pictoris b 53 interglacial periods 52 eclipsing binary 52 arcseconds 52 magnetotail 52 brown dwarf 52 Oort Cloud 52 magnetospheric 52 occultation 52 Wolf Rayet star 52 smoothed sunspot number 52 cryovolcanism 52 GJ#b 52 occultations 52 cosmic ray flux 52 Omega Centauri 52 waxing crescent moon 52 supernova explosion 52 Heliospheric Observatory SOHO 52 coronal loop 52 magnetic reconnection 52 distant galaxy 52 cosmic ray intensity 52 Kuiper Belt Object 52 nebula 52 arcsecond 52 convective 52 lunar perigee 52 KBOs 52 sidereal 52 ESO PR 52 ULIRGs 52 celestial equator 51 XTE J# 51 perihelion 51 J# +# [002] 51 star Spica 51 solar nebula 51 Leonid shower 51 Earthlike planets 51 smallest exoplanet 51 metallicity 51 exoplanet orbiting 51 filamentary structures 51 planets orbiting 51 Madden Julian Oscillation 51 substorms 51 X ray binary 51 planetary transits 51 NASA Cassini spacecraft 51 arcminutes 51 galactic cosmic rays 51 blazar 51 brightest supernova 51 Kuiper Belt object 51 moon Enceladus 51 Crab Nebula 51 HiRISE image 51 X ray wavelengths 51 ultraviolet wavelengths 51 SN #A 51 tropospheric 51 constellation Taurus 51 elliptical galaxies 51 GRB# 51 Rosette Nebula 51 volcanic quakes 51 HD#b 51 galaxy M# [002] 51 Corot 7b 51 axial tilt 51 Fermi telescope 51 cluster NGC 51 transiting planet 51 RS Ophiuchi 51 GQ Lupi 51 Arabia Terra 51 meteoroid 51 BP Psc 51 luminous galaxies 51 auroral oval 51 HD #b [002] 51 Noctilucent clouds 51 Orionid meteor shower 51 Geminid meteor shower 51 globular cluster 51 innermost planet 51 Betelgeuse 51 cosmic microwave background 51 Paleocene Eocene Thermal Maximum 50 meridional flow 50 Oort cloud 50 HL Tau 50 OGLE TR 50 volcanism 50 planets orbits 50 galactic disk 50 chondrites 50 thin crescent moon 50 luminosities 50 waxing gibbous moon 50 AGNs 50 Comet Hartley 50 blue supergiant 50 Perseid meteor 50 volcanic tremor 50 Andromeda Galaxy 50 Kuiper belt objects 50 GJ #b [002] 50 Olympus Mons 50 geomagnetic disturbances 50 Mimas 50 gamma ray observatory 50 LASCO imagery 50 moon Mimas 50 extrasolar planets 50 infrared wavelength 50 Grímsvötn 50 protoplanet 50 WMAP satellite 50 radial velocity 50 Milky Way galaxy 50 pulsar 50 supernova remnants 50 CoRoT 50 annular eclipse 50 HM Cancri 50 planet orbiting 50 Gliese #c 50 AU Mic 50 P/# A2 50 Scorpii 50 planet orbits 50 Orionid meteors 50 comet 50 exoplanets orbiting 50 YORP effect 50 Saturn moon Iapetus 50 Eta Aquarid meteor shower 50 gamma ray bursts 50 Geminid meteors 50 star Gliese 50 Leonid Meteor Shower 50 unaided eye 50 TrES 50 Cassini flyby 50 Geminid 50 aurorae 50 mesosphere 50 super Earths 50 gravitationally bound 50 Saturn rings 50 galaxies 50 Orionid 49 THEMIS 49 Corot 9b 49 Syrtis Major 49 astronomers 49 Perseus constellation 49 deglaciation 49 meteoroids 49 GRBs 49 constellation Andromeda 49 glaciations 49 magnetars 49 mid latitudes 49 microlensing 49 tropopause 49 Geomagnetic 49 Mpc 49 baryon 49 microquasar 49 supervolcanoes 49 Trifid Nebula 49 constellation Orion 49 Wolf Rayet stars 49 distant quasar 49 Puppis 49 Zeta Ophiuchi 49 Hipparcos 49 meteor shower 49 RRATs 49 starburst galaxy 49 comets orbiting 49 Carina constellation 49 BLG #L 49 Cancri e 49 ionospheric 49 Cancri 49 tropical troposphere 49 Eridani 49 Leonids 49 telescopic observations 49 microlensing events 49 HF propagation 49 Cosmic Microwave Background 49 constellation Perseus 49 Geminids 49 interglacial period 49 NGC# 49 femtoseconds 49 Titan flyby 49 supernova SN 49 COROT 49 airglow 49 m z 49 auroras 49 GJ #b [001] 49 Saturnian moon 49 Perseids Meteor Shower 49 X ray binaries 49 X ray pulses 49 Kuiper belt 49 exoplanetary 49 oscillations 49 gravitational microlensing 49 Earth radii 49 TRMM satellite 49 neutron star 49 tropical latitudes 49 Jenniskens 49 reionization 49 Leonid meteor showers 49 keV 49 lunar eclipses 49 Sedna 49 Younger Dryas 49 Lagoon Nebula 49 observable universe 49 velocity dispersion 49 pulsars 49 spaceweather.com 49 emission nebula 49 ejecta 48 Beta Pictoris 48 dwarf galaxy 48 moonlets 48 constellation Ursa Major 48 TrES 4 48 brown dwarfs 48 Comet Hartley 2 48 Saturn moon Enceladus 48 red supergiants 48 volcanic activity 48 auroral displays 48 ° N 48 electron density 48 constellation Sagittarius 48 galactic alignment 48 geoeffective 48 protostar 48 Jupiter moon Io 48 electron neutrinos 48 convective clouds 48 Arches Cluster 48 CoRoT 9b 48 Sagittarius B2 48 interferogram 48 RXTE 48 Eta Aquarids 48 constellation Leo 48 phyllosilicates 48 astronomical objects 48 protoplanetary disk 48 G#.# +#.# 48 Cat Paw Nebula 48 V# Mon 48 supermoon 48 penumbral lunar eclipse 48 infrared satellite imagery 48 GeV 48 Coma Cluster 48 meteors 48 HiRISE camera aboard 48 spacecraft flyby 48 AB Aurigae 48 faint galaxies 48 Kuiper Belt objects 48 insolation 48 extrasolar planetary systems 48 Carina Nebula 48 Enceladus 48 Kuiper Belt Objects 48 volcanic tremors 48 spiral galaxy 48 constellation Cygnus 48 earthshine 48 globular star 48 Solar Dynamics Observatory 48 atmospheric methane 48 moons orbiting 48 Wilkinson Microwave Probe 48 quasars 48 sun corona 48 Leonid meteor 48 planets orbiting distant 48 sunlike star 48 constellation Ophiuchus 48 constellation Bootes 48 magnetosphere 48 protostars 48 Gamma Virginids 48 Antennae Galaxies 48 distant galaxy clusters 48 stellar occultations 48 galaxy M# [001] 48 System #L 48 Leonid meteor shower 48 Voyager spacecraft 48 axions 48 Leonid meteors 48 El Niños 48 perturbation 48 STEREO spacecraft 48 Comet Halley 48 heliopause 48 X ray telescopes 48 proplyds 48 supernova explosions 48 logarithmic scale 48 moon Io 48 planet TrES 48 polar latitudes 48 gamma ray flares 48 spiral galaxies 48 icy moons 48 Pluto Charon 48 globulars 48 midlatitudes 48 filamentary structure 48 KH #D 48 SN #D 48 redshifts 48 Orion nebula 48 ecliptic 48 blazars 48 Ring Nebula 48 SNR #-#.# 48 gravitational interactions 48 2MASS 48 attosecond 48 PSR J# 48 storminess 48 Virginis 48 reflection nebula 48 interannual variability 48 Pleiades star 48 merging galaxies 48 exo planets 48 Perseid meteors 48 Galilean moons 48 CoRoT #b 48 prograde 48 glaciation 47 cosmic rays 47 Helix Nebula 47 micron wavelengths 47 ionosphere 47 Hale Bopp 47 pointings 47 equinox occurs 47 Meteor Shower 47 GALEX 47 stellar occultation 47 circular orbits 47 Taurids 47 distant quasars 47 muon neutrinos 47 Eemian 47 nebular 47 elliptical orbits 47 sundog 47 supernovas 47 cm -1 47 SuperMoon 47 arcsec 47 brightnesses 47 Cassiopeia 47 Ontario Lacus 47 periodic oscillations 47 superheavy elements 47 Comet Machholz 47 crescent Moon 47 OMEGA instrument 47 Proxima Centauri 47 globular cluster M# 47 gamma ray burst GRB 47 Epsilon Eridani 47 habitable planets 47 extrasolar 47 baryonic 47 coronal mass ejections CMEs 47 Red Rectangle 47 brightest comet 47 southern constellation Carina 47 anisotropy 47 baryons 47 crustal thickness 47 troposphere 47 HD# [002] 47 constellation Scorpius 47 cosmic ray protons 47 intrinsic brightness 47 BLG #Lb 47 planets 47 amplitudes 47 z ~ 47 moonlet 47 carbonaceous chondrites 47 decadal 47 cometary debris 47 planets circling 47 exoplanets 47 Cambrian explosion 47 anticyclonic 47 redshift 47 Saturn magnetosphere 47 Perseid meteor shower 47 total solar irradiance 47 kyr 47 mantle plumes 47 stratovolcano 47 Milky Way Galaxy 47 Little Ice Age 47 moonquakes 47 superluminal 47 Cygnus X 47 Comet Tempel Tuttle 47 radiative forcing 47 irradiance 47 Perseids meteor shower 47 prominences 47 ENSO cycle 47 NASA Wilkinson Microwave 47 waning gibbous moon 47 sodium atoms 47 Grimsvoetn 47 planets orbiting sun 47 Andromeda galaxy 47 X ray photons 47 vorticity 47 constellation Gemini 47 celestial object 47 MODIS 47 polar mesospheric clouds 47 Earth axial tilt 47 fainter 47 interacting galaxies 47 deep convective clouds 47 #P/Holmes 47 Cygni 47 Valles Marineris 47 comet nucleus 47 retrograde orbit 47 J#.# [001] 47 interferograms 47 Myr 47 Eagle Nebula 47 constellation Libra 47 asterism 47 dwarf galaxies 47 Veniaminof 47 Heliospheric Observatory 47 Venus transits 47 infrared spectral 47 aphelion 47 slender crescent 47 Saturn moon Mimas 47 giant elliptical galaxy 47 binary asteroid 47 Perseid Meteor Shower 47 HAT P 47 supernova remnant Cassiopeia 47 visible wavelengths 47 planet Gliese #g 47 Tarantula nebula 47 Bug Nebula 47 Comet McNaught 47 glacial cycles 47 CMEs 47 Sromovsky 46 picosecond 46 MN4 46 ringed planet 46 galactic cores 46 Saturnian 46 Tempel Tuttle 46 equatorial 46 maser emission 46 neutrino 46 inner moons 46 Geomagnetic storms 46 planet HD #b 46 Delta Aquarids 46 super perigee moon 46 HII regions 46 bullish divergence 46 bearish divergence 46 NGC #A 46 heavily cratered 46 globular clusters 46 planets orbiting stars 46 perigee 46 gravitational lensing 46 protoplanetary disks 46 ITCZ 46 Delta Cephei 46 gamma rays 46 TGFs 46 sparticles 46 recurrent coronal hole 46 planemos 46 penumbral eclipse 46 Aram Chaos 46 extragalactic 46 galaxy formation 46 Shiveluch 46 SN #E 46 lunar crust 46 distant galaxies 46 photometry 46 thermosphere 46 Geminid Meteor Shower 46 infrared wavelengths 46 Cepheids 46 trans Neptunian objects 46 Milky Way halo 46 galactic mergers 46 HiRISE 46 outer corona 46 Space Telescope 46 constellations Cygnus 46 interglacials 46 STEREO 46 supergiant stars 46 afterglows 46 solar radii 46 Haumea 46 Higgs particle 46 Toutatis 46 geomagnetic storms 46 annular solar eclipse 46 Gamma ray bursts 46 Gliese 46 coronal loops 46 Large Magellanic Cloud 46 Late Heavy Bombardment 46 elongated orbits 46 spherically symmetric 46 cosmological distances 46 fainter objects 46 galaxy clusters 46 constellation Lyra 46 exosphere 46 gravitational lens 46 smallest extrasolar planet 46 Aurigid 46 Comet Hale Bopp 46 Scheila 46 Galaxy Evolution 46 asteroids orbiting 46 Orion constellation 46 comet Hale Bopp 46 waxing crescent 46 cirrus 46 Palaeocene Eocene Thermal Maximum 46 planetary nebulae 46 faraway galaxies 46 nebulosity 46 corona 46 dI dV 46 El Niño La Niña 46 infrared spectra 46 zodiacal constellations 46 pentaquark 46 supermassive black hole 46 type Ia supernovae 46 Permian extinction 46 cosmic ray particles 46 ray Space Telescope 46 constellation Carina 46 quasiparticle 46 Bullet Cluster 46 waning crescent Moon 46 meteor sightings 46 Small Magellanic Cloud 46 Tycho supernova 46 HIP #b 46 chondrules 46 constellation Hercules 46 constellation Pegasus 46 millibar 46 rocky extrasolar planet 46 Jupiter Uranus 46 Shinmoedake 46 NEAs 46 interglacial 46 distant supernovae 46 VIRTIS 46 Ice Ages 46 Super Earths 46 high redshift galaxies 46 hypervelocity stars 46 Global Surveyor 46 volcanic earthquakes 46 solar insolation 46 spectra 46 jet contrails 46 Iapetus 46 Orcus Patera 46 X ray emitting 46 Hot Jupiters 46 foreground galaxy 46 RS Oph 46 galactic equator 46 atmospheric CO 46 orbits 46 Upsilon Andromedae b 46 galaxy redshift 46 oscillation 46 astrometric 46 ESO telescopes 46 paleoclimatic 46 heliospheric 45 Dirac fermions 45 lavas 45 gravitational wave 45 missing baryons 45 climatological 45 maxima 45 rocky planets 45 cosmic cannibal 45 Supernova #A 45 Voorwerp 45 Virgo Cluster 45 martian 45 lava flows 45 XO 3b 45 interferometry 45 δ 45 Kuiper belt object 45 Earthlike planet 45 Hanny Voorwerp 45 Aqua satellite 45 meteor showers 45 heliosphere 45 Rossby waves 45 XMM Newton observations 45 Milky Way 45 SN #C 45 electron diffusion 45 albedo reflectivity 45 seismicity 45 Milankovitch cycles 45 NASA Aqua 45 Geminid meteor showers 45 galaxy 45 millisecond pulsars 45 Uranus 45 equinox 45 Stephan Quintet 45 photons 45 ν 45 volcanic plumes 45 Last Glacial Maximum 45 de Pater 45 Medieval Warm Period 45 obscuration 45 NASA Voyager spacecraft 45 Geminga 45 tau neutrino 45 gamma ray 45 WFPC2 45 heliosheath 45 landfalling hurricanes 45 barred spiral galaxy 45 celestial phenomenon 45 Caloris Basin 45 Fig. 2A 45 fermion 45 Perseid shower 45 gamma ray emitting 45 Solar Dynamics 45 GRB #A 45 boson 45 multi decadal 45 #.#C [004] 45 anticyclones 45 Neukum 45 HiRISE images 45 Antarctic ozone 45 lensing galaxy 45 OGLE 45 Magellanic Stream 45 ESA XMM Newton 45 Lulin 45 kelvin 45 X ray observatories 45 gibbous moon 45 Galilean satellites 45 ROSAT 45 attoseconds 45 Atlantic Multidecadal Oscillation 45 comets 45 Virgo cluster 45 BP Piscium 45 PKS #-# 45 type Ia supernova 45 spherical halo 45 Gliese #e 45 WIMPs 45 blackbody 45 Magellanic Clouds 45 Dikpati 45 active galactic nuclei 45 sulfur isotope 45 COROT 7b 45 electron volts 45 geologically active 45 UV wavelengths 45 Goldilocks planet 45 magnetic substorms 45 Methone 45 moon Charon 45 NSIDC 45 basaltic rocks 45 dynamical 45 interstellar boundary 45 planet Gliese #c 45 planets Uranus 45 southern latitudes 45 cirrus cloud 45 neutrino mass 45 nightside 45 Geminids meteor shower 45 moons Europa 45 eruptions 45 absorption spectra 45 backscattered 45 chromatogram 45 planetary 45 noctilucent 45 planet magnetosphere 45 sunward 45 hydrothermal activity 45 Type Ia supernovas 45 NASA Chandra 45 circumstellar disk 45 poleward 45 Eyjafjallajökull eruption 45 silicate dust 45 Planck satellite 45 anomalously 45 KT boundary 45 OGLE TR #b 45 MUFON Case # 45 Fomalhaut 45 Giovanni Cassini 45 martian atmosphere 45 autumn equinox 45 LORRI 45 Planck telescope 45 HUDF 45 spectroscopic observations 45 Ordovician extinction 45 lobate scarps 45 Pegasi 45 Kelvins 45 SUSY 45 COROT exo 3b 45 Saturn aurora 45 galactic clusters 45 helium nuclei 45 waning crescent moon 45 lithosphere 45 astrophysicists 45 Type Ia 45 Pacific Decadal Oscillation PDO 45 Konacki 45 Crab Pulsar 45 volcanically active 45 VLTI 45 vernal equinox 45 spatially resolved 45 Wilkinson Microwave Anisotropy Probe 45 Svensmark 44 fractal pattern 44 explosive eruptions 44 geoid 44 Alfvén waves 44 Ross Ice Shelf 44 spectroscopically 44 negative divergences 44 elliptical galaxy NGC 44 Martian dust 44 Digitized Sky Survey 44 active galactic nucleus 44 Perseus cluster 44 quasicrystal 44 Gliese #d 44 highly elliptical orbit 44 Earth ionosphere 44 optical telescopes 44 Gamma rays 44 nT 44 arcmin 44 calderas 44 waning crescent 44 Explorer WISE 44 retrograde orbits 44 warm interglacial periods 44 hypervelocity star 44 Tarantula Nebula 44 Saturn Uranus 44 comet McNaught 44 ESA Envisat satellite 44 Cassini 44 planetary orbits 44 Medieval Warming 44 polarimetry 44 constellation Puppis 44 Fig. 1A 44 infall 44 moon Ganymede 44 Helix nebula 44 volcanic plume 44 positrons 44 planetesimals 44 outermost planets 44 equatorial Pacific Ocean 44 Churyumov Gerasimenko 44 astrometry 44 Seismicity remains 44 polar 44 supersymmetric particles 44 coronagraph 44 ellipse 44 Saturn Cassini 44 ESO telescope 44 interferometer 44 Higgs bosons 44 Nasa spacecraft 44 synthetic aperture 44 tropical cyclones 44 CMB radiation 44 atmospheric CO2 concentration 44 picoseconds 44 Swift Tuttle 44 sextile 44 coronal mass ejections 44 lava fountains 44 zodiacal 44 MESSENGER spacecraft 44 Encke gap 44 gravitational waves 44 Great Conveyor Belt 44 Cryogenian 44 decadal variability 44 Venusian 44 NASA Fermi Gamma 44 Triangulum Galaxy 44 Adam Riess 44 Pleiades cluster 44 SNe Ia 44 monsoonal moisture 44 Comet Elenin 44 wavefunction 44 Gusev crater 44 constellation Aries 44 MGS Mars Orbiter Camera 44 Saturn equinox 44 electron flux 44 compressional 44 mainshock 44 Yellowstone caldera 44 Ringed Planet 44 HSNSI 44 comet tail 44 Orionid Meteor Shower 44 star Proxima Centauri 44 planet WASP #b 44 Cosmic Microwave Background CMB 44 crustal 44 #.#oC [001] 44 ultraviolet radiation emitted 44 Cassini flybys 44 constellation Cetus 44 volcanic eruptions 44 climatologically 44 Holocene 44 occulted 44 abundances 44 photon 44 strange quark 44 Galileo spacecraft 44 TNOs 44 Gamma ray burst 44 PANHANDLE Temperatures 44 HiRISE camera 44 solar prominences