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(Click for frequent words.) 60 vapor trail 59 contrails 54 plume 53 zodiacal light 51 jet contrails 50 meteoroid 50 vapor trails 50 vapor cloud 50 volcanic plume 49 SN #gy 49 comet Hale Bopp 48 X ray emission 48 smoke plumes 48 cumulus cloud 47 Comet Holmes 47 predawn sky 47 X ray afterglow 47 chemtrails 47 sundog 47 unaided eye 47 exhaust plume 47 fireball streaking 47 plumes 46 meteor 46 supernova remnant 46 fainter objects 46 accretion disk 46 gamma ray burst 46 cirrus clouds 45 P/# A2 45 elliptical galaxy 45 galactic bulge 45 Hanny Voorwerp 45 ash plume 45 Saturn magnetosphere 45 jet contrail 45 chemtrail 45 accretion disks 45 Voorwerp 45 IBEX spacecraft 45 UFO hovering 45 Comet Hale Bopp 45 Type Ia supernova 45 Geminids 45 waterspout 45 constellation Aquarius 45 fireball 44 gamma ray emission 44 Helix Nebula 44 Quadrantids 44 Nasa spacecraft 44 Comet Lulin 44 Comet Hartley 2 44 GRB# 44 gamma ray flares 44 redshifted 44 blazar 44 constellation Perseus 44 aurorae 44 protective thermal tiles 44 brightest supernova 44 SpaceWeather.com 44 outer corona 44 Earth magnetotail 44 Spaceweather.com 44 Comet Encke 44 sonic boom 44 innermost planet 44 moonlets 44 planet orbiting 44 Perseus constellation 44 Contrails 44 airplane contrail 44 Meteor showers 44 sunspot cluster 44 mystery Skorik 44 Andromeda Galaxy 44 Fomalhaut b 44 Grimsvotn GREEMSH votn volcano 44 planets comets 44 elliptical orbits 43 Pleiades star 43 Orionids 43 RHESSI 43 G#.# +#.# 43 earthshine 43 orbiting planets 43 billowing cloud 43 moonless sky 43 Andromeda galaxy 43 Perseid meteors 43 afterglows 43 ray Space Telescope 43 cirrus cloud 43 magnetotail 43 slender crescent 43 Saturn Cassini 43 auroral displays 43 distant galaxy 43 gaseous planet 43 solar corona 43 HM Cancri 43 Fimmvorduhals 43 GRB #B 43 SN #A 43 noctilucent clouds 43 orbiting Cassini spacecraft 43 Perseid meteor 43 brightest comet 43 red supergiant 43 Grímsvötn volcano 43 Iapetus 43 Galileo spacecraft 43 gamma ray observatory 43 Martian crater 43 gamma ray bursts GRBs 43 ionized gas 43 Unidentified Flying Object 43 Sobakam 43 Goldilocks planet 43 Samuel Oschin Telescope 43 X #B 43 giant elliptical galaxy 43 thunderhead 43 Omega Centauri 43 Eta Carinae 43 galaxy NGC 42 RS Ophiuchi 42 X #A Waverider 42 chromosphere 42 elongated orbits 42 Epsilon Aurigae 42 constellation Cassiopeia 42 meteoroids 42 AB Aurigae 42 circumstellar disk 42 ashfall advisory 42 towering cumulus clouds 42 Saturn moon Mimas 42 NASA Cassini spacecraft 42 brown smudge 42 spacecraft flyby 42 obscuration 42 sky 42 CoRoT satellite 42 Beta Pictoris b 42 Orionid 42 cylindrical object 42 millisecond pulsar 42 galaxy M# [002] 42 ejecta 42 telescope eyepiece 42 galactic disk 42 clouds 42 starburst galaxy 42 blazars 42 coronal mass ejection 42 Leonid meteor showers 42 moon Mimas 42 lensing galaxy 42 Swift Tuttle 42 geologist Jennifer Adleman 42 cryovolcanism 42 supermoon 42 lenticular clouds 42 corona 42 planetary Transits 42 SOHO spacecraft 42 Saturnian moon 42 Magellanic Stream 42 comet 42 GRBs 42 meteor shower 42 gravitational interaction 42 Solar Dynamics Observatory 42 wispy cirrus clouds 42 cometary debris 42 spectral fingerprint 42 quasar 42 X ray wavelengths 42 Upsilon Andromedae b 42 cumulus clouds 42 Eyjafjoell eruption 42 planets orbiting stars 42 Perseus Cluster 42 Zeta Ophiuchi 42 circumstellar disks 42 galactic halo 42 lava flowing 42 comet McNaught 42 funnel cloud 42 galaxy cluster 42 Jupiter moon Io 42 Saturn rings 42 stratus clouds 42 Supernova #A 42 smoggy atmosphere 42 ecliptic 42 supermassive black hole 42 nebula 42 icy moons 42 supernova 42 exosphere 42 interstellar magnetic 42 aurora 42 Carolyn Porco 42 Halemaumau 42 emits X rays 41 gravitationally bound 41 thin crescent 41 celestial sphere 41 exoplanet orbiting 41 nighttime liftoff 41 Crab Nebula 41 celestial object 41 puffy cumulus clouds 41 Comet McNaught 41 visible wavelengths 41 THEMIS satellites 41 filamentary structure 41 cumulonimbus 41 Amateur astronomers 41 Grimsvoetn 41 spaceweather.com 41 lunar perigee 41 GRB # 41 lunar crust 41 outermost planets 41 magnetar 41 planets orbits 41 constellation Eridanus 41 mesosphere 41 fading afterglow 41 volcanic plumes 41 downbursts 41 Naro rocket 41 HD#b 41 SN #D 41 filamentary structures 41 Perseid meteor shower 41 magma boiling 41 Oort Cloud 41 Saturnian moons 41 Fermi telescope 41 spiral galaxy NGC 41 NASA Voyager spacecraft 41 NASA MESSENGER spacecraft 41 infall 41 Virgo Cluster 41 inner Oort Cloud 41 icy comets 41 protoplanet 41 Gravitational waves 41 extrasolar 41 magnetic reconnection 41 prominences 41 elliptical galaxy NGC 41 BP Psc 41 Lyrids 41 moonlet 41 crater 41 polar vortex 41 meteors 41 Leonid meteor shower 41 HD #b [002] 41 puffy clouds 41 Oort cloud 41 relativistic jets 41 planetary nebula 41 amateur skywatchers 41 Milky Way Galaxy 41 ionised gas 41 coronal loop 41 geysers erupting 41 smallest exoplanet 41 submillimeter wavelengths 41 emergency landing Belevan 41 substorm 41 Grimsvoetn volcano 41 comet tail 41 TGFs 41 Lulin 41 photosphere 41 V# Mon 41 orb 41 thin crescent moon 41 Red Rectangle 41 gravitational interactions 41 Upsilon Andromedae 41 extrasolar planet 41 waitress Ingrid Sufan 41 meteor streaking 41 reionization 41 Cassini spacecraft 41 annular eclipse 41 Explorer WISE 41 retrograde orbit 41 Geminid shower 41 Cassini imaging 41 underwater plume 41 WASP #b 41 fissure eruption 41 protostars 41 Lyrid meteor shower 41 exo planets 41 spiral nebulae 41 Orionid meteors 41 SN #C 41 Cancri e 41 Titan smoggy 41 galactic cosmic rays 41 comet Tempel Tuttle 41 Noctilucent clouds 41 planetary nebulas 40 gamma rays 40 preset orbit 40 Klekociuk 40 Bill Borucki Kepler 40 foreground galaxy 40 Cherenkov radiation 40 type Ia supernova 40 Earthlike planet 40 MG J# +# 40 NGC #A 40 Taurid meteor shower 40 HiRISE camera aboard 40 Herbig Haro 40 Grímsvötn 40 reflection nebula 40 volcano erupting 40 nebulosity 40 Eyjafjoell volcano 40 microquasar 40 active galactic nucleus 40 auroral 40 spherical halo 40 sunlike star 40 Taurids 40 hydrocarbon haze 40 Geminid 40 backscattered 40 auroras 40 Sagittarius dwarf galaxy 40 polar stratospheric 40 STEREO spacecraft 40 airglow 40 Magellanic Clouds 40 vapor plume 40 unarmed Minuteman 3 40 sunspots 40 ecliptic plane 40 clouds obscuring 40 Perseids 40 solar nebula 40 TRMM satellite 40 Dynamics Observatory 40 poles flanking 40 penumbral shadow 40 sunspot 40 billowing clouds 40 MESSENGER spacecraft 40 reddish glow 40 alien spacecraft 40 sonic booms 40 Lightning flickered 40 distant galaxy clusters 40 interstellar cloud 40 constellation Cetus 40 Circinus X 1 40 Thick clouds 40 ionized hydrogen 40 spokesman Roland Herwig 40 Icelandic meteorological 40 cumulous clouds 40 millisecond pulsars 40 Galaxy Evolution 40 occultations 40 supernova explosion 40 thunderclouds 40 Heliospheric Observatory SOHO 40 constellation Virgo 40 Io volcanoes 40 towering thunderheads 40 Earthlike planets 40 GJ #b [002] 40 constellation Centaurus 40 interstellar clouds 40 intrinsic brightness 40 MZ 3A 40 Digitized Sky Survey 40 inversion layer 40 Ted Molczan Canadian 40 Thick smoke 40 pulsating aurora 40 spiral galaxies 40 groundfire 40 Imaging Spectroradiometer MODIS instrument 40 galaxies 40 cigar shaped 40 diffuse aurora 40 Corot 7b 40 transiting exoplanet 40 moon Io 40 Aqua satellite 40 WISE infrared 40 Cassini Huygens spacecraft 40 Antennae Galaxies 40 energetic electrons 39 planet HD #b 39 moons orbiting 39 specular reflection 39 comets orbiting 39 sheens 39 infrared ultraviolet 39 lava flows 39 Ringed Planet 39 comet nucleus 39 Halley Comet 39 Syrtis Major 39 ESA Integral 39 moon Titan 39 Perseid shower 39 tornadic 39 coronal loops 39 comet Lulin 39 Espenak 39 flyby 39 Quadrantid meteor shower 39 meteor sightings 39 protoplanetary disks 39 thermonuclear reactions 39 cometary material 39 Ulysses spacecraft 39 atmospheric phenomena 39 Yellowstone supervolcano 39 Comet 9P/Tempel 1 39 ultraviolet imaging spectrograph 39 cosmic ray flux 39 X ray emitting 39 pulsar 39 Deep Impact probe 39 Earthlike 39 Orion constellation 39 GQ Lupi 39 NASA Cassini orbiter 39 hypersonic speeds 39 DISR 39 NASA CloudSat 39 tidal tails 39 troposphere 39 Neil Gehrels 39 Eyjafjallajokull Volcano 39 supervolcanoes 39 gibbous 39 meteor streaks 39 planet Uranus 39 cosmic cannibal 39 penumbral lunar eclipse 39 Funnel clouds 39 faint smudge 39 RF 4C reconnaissance 39 ballistic trajectory 39 circular orbits 39 Comet Hartley 39 Jovian atmosphere 39 moonbow 39 partial eclipse 39 star Fomalhaut 39 BP Piscium 39 constellation Orion 39 aerosol particles 39 microlensing events 39 Earth magnetosphere 39 brownish haze 39 superheated gases 39 planets orbiting 39 super perigee moon 39 optical illusion 39 spherically symmetric 39 olivine mineral 39 irregularly shaped asteroid 39 infalling 39 TrES 4 39 Lava flows 39 Iceland volcano Eyjafjallajokull 39 accreting 39 sulfate salts 39 infrared satellite imagery 39 icy moon Enceladus 39 starlike object 39 Sasselov 39 martian atmosphere 39 perihelion 39 SCP #F# 39 faint glow 39 atmospheric disturbances 39 planets circling stars 39 spew ash 39 planetary embryos 39 Orion Nebula 39 GLAST telescope 39 faint galaxies 39 Puu Oo 39 Arches Cluster 39 pyroclastic flow 39 spotted funnel cloud 39 Eyjafjallajoekull glacier 39 MODIS 39 water vapor 39 Cassini spacecraft orbiting 39 WISE telescope 39 emission nebula 39 neutron star 39 streaking diagonally across 39 Pamir Airways logo 39 mushroom cloud 39 spew lava 39 Saturn moon 39 umbral shadow 39 cosmological distances 39 orange glow 39 midlatitudes 39 Saturn auroras 39 Optical Gravitational Lensing Experiment 39 Icelandic volcanologist 39 atmospheric turbulence 39 constellation Ursa Major 39 Veniaminof 39 Stephan Quintet 39 NASA STEREO 39 proplyds 39 haze 39 ejecta blanket 39 protostar 39 infrared observatory 39 meteor fireball 39 magnetospheric 39 vertical tail fin 39 orbiting Hubble Space Telescope 39 ringed planet 39 glowing corona 39 moon Charon 39 moon Enceladus 39 BP.com website early 39 hydroxyl molecules 39 bedrock outcropping 39 HD #b [001] 39 #P/Holmes 39 occulted 39 Venusian atmosphere 39 patchy dense fog 39 exoplanets 39 Wolf Rayet star 39 planets Uranus 39 orbital maneuvering engine 39 bluish 39 Comet NEAT 39 Sara Seager 39 binary quasar 39 Crab Pulsar 39 annular solar eclipse 39 Tycho supernova remnant 38 lava flow 38 Mission TRMM satellite 38 Jeff Juzyk looked 38 comet flyby 38 temperature inversions 38 hazy skies 38 Comet Machholz 38 altocumulus 38 huge fireballs exploding 38 interstellar particles 38 CoRoT 7b 38 planetary nebulae 38 blobs 38 Saturn moon Iapetus 38 volcanic ash originating 38 Cassini flyby 38 Extrasolar planets 38 Type Ia supernovas 38 investigates UFOs 38 occultation 38 unmanned Predator spy 38 Voyager spacecraft 38 rainbow arching 38 Saturn moon Enceladus 38 afterglows linger 38 astronomical objects 38 gamma ray flashes 38 impactor spacecraft 38 Gliese #c 38 Earth orbiting satellites 38 periodic dimming 38 Geminid meteor shower 38 Evolution Explorer 38 nebulae 38 ionised 38 comet orbit 38 infrared telescope 38 Lisa Eklund 38 gyre 38 lightning bolts lit 38 blotchy rash 38 Geminga 38 Geminids meteor shower 38 V# Puppis 38 solar prominences 38 Doganer 38 beak deformities 38 Planck telescope 38 Cosmic rays 38 Wolszczan 38 vortices 38 constellation Taurus 38 VY Canis Majoris 38 starlike 38 orbital velocity 38 ionosphere 38 globular cluster 38 supergiant star 38 greenish yellow 38 Kuiper belt objects 38 Ring Nebula 38 X ray pulses 38 Gusev crater 38 orbits 38 AGNs 38 Kuiper Belt Objects 38 cameraman Gil Leyvas 38 faraway galaxies 38 distant quasar 38 Eyjafjallajökull eruption 38 permanently shadowed craters 38 NewsChopper 38 relativistic particles 38 Viking Orbiter 38 merging galaxies 38 gendarme helicopter 38 Perseid meteor showers 38 radioactive plume 38 Colonel Jorge Amaral 38 THEMIS spacecraft 38 barred spiral galaxy 38 Eyjafjallajoekull volcano 38 OGLE TR #b 38 Galilean moons 38 Tharsis Rise 38 planet WASP #b 38 ultraviolet wavelengths 38 Leonid meteors 38 partial lunar eclipse 38 supercell 38 elliptical galaxies 38 damaged thermal tiles 38 cirrus 38 celestial fireworks 38 phosphorescence 38 Maunder minimum 38 Martian dust devils 38 meteoritic material 38 Spitzer infrared 38 breathing scramjet engine 38 interstellar dust clouds 38 waxing gibbous moon 38 celestial equator 38 supernova remnants 38 horseshoe shaped crater 38 Cat Paw Nebula 38 Rosetta spacecraft 38 Jenniskens 38 brown dwarf 38 Saturn moons Titan 38 X ray telescopes 38 dwarf galaxy 38 protoplanetary disk 38 Betelgeuse 38 sun corona 38 droplets 38 microburst 38 Phoebe orbits 38 infrared imagery 38 erupt explosively 38 sunward 38 transiting planet 38 oil sheens 38 volcano spewed lava 38 KBOs 38 dark moonless 38 astronomers 38 EPOXI spacecraft 38 molten rock 38 Small Magellanic Clouds 38 eruptive activity 38 Olympus Mons 38 Saturn moons 38 cinder cones 38 Partial lunar eclipse 38 gaseous planets 38 gravitational lens 38 belched plume 38 KH #D 38 gravity warps 38 Merapi crater 38 red supergiants 38 Redoubt Volcano 38 spokesman Allen Kenitzer 38 Tempel Tuttle 38 cloudiness 38 Observatory SDO 38 volcanic ashes 38 Foro Italico gusty winds 38 wake vortices 38 cosmic collisions 38 ash plumes 38 Chemtrails 38 fuzzy blob 38 galaxy M# [001] 38 galactic mergers 38 molten magma 38 winged spacecraft 38 Valles Marineris 38 HiRISE camera 38 billowing contrail seen 38 RS Oph 38 transiting planets 38 altocumulus clouds 37 dust devils 37 convective clouds 37 MH #S Seahawk 37 penumbral eclipse 37 waning crescent 37 Very Large Array 37 flying saucers 37 tornadic activity 37 supernova explosions 37 SN#A 37 UFO sightings 37 ejecta plume 37 extrasolar planets 37 Fermi Telescope 37 Dense clouds 37 TheWeatherSpace.com 37 temperature inversion 37 Eyjafjallajökull 37 Keck Telescope 37 crescent moon 37 axions 37 Giovanni Cassini 37 Magnus Tumi Gudmundsson 37 Kuiper belt 37 Saturn equinox 37 asteroidal 37 constellation Carina 37 Orcus Patera 37 Grimsvotn volcano Iceland 37 observable universe 37 Helix nebula 37 Elenin 37 Taurus XL rocket 37 Bug Nebula 37 NROL 37 galaxy clusters 37 atmospheric haze 37 constellation Hercules 37 Yellowstone caldera 37 gamma ray bursts 37 Perseids meteor shower 37 Type Ic supernovae 37 Delta Cephei 37 Lunar Crater Observation 37 liquid droplets 37 Epsilon Eridani 37 Leonids 37 Substorms 37 aphelion 37 Bok globules 37 incomplete combustion 37 torus 37 billowing smoke 37 compressor stall 37 SKYFOX 37 noctilucent 37 whitish 37 Higgs bosons 37 Eagle Nebula 37 magma ocean 37 CoRoT 9b 37 Mandushev 37 hovered overhead 37 Tropical Storm Neki 37 kph updraft winds 37 novas 37 Dennis Mammana 37 Great Orion Nebula 37 Americans newfound frugality 37 moon Dione 37 total lunar eclipse 37 Type 1a supernovae 37 NEAs 37 Enceladus icy 37 Huge plumes 37 bipod ramp 37 GJ #b [001] 37 Michael Kucharek 37 Nikku Madhusudhan 37 acrid smelling smoke 37 #gy 37 Iridium satellites 37 Orionid meteor shower 37 Carey Lisse 37 Aurigid 37 UFO 37 runway centerline 37 blue supergiant 37 perigee 37 gravitational tides 37 Alfven waves 37 Iceland Grimsvoetn volcano 37 noctilucent cloud 37 Puppis 37 NASA Aqua 37 MUFON 37 Milky Way galaxy 37 Pavlof Volcano 37 compressor stalls 37 auroral activity 37 planets constellations 37 glowing brightly 37 X ray binary 37 blob 37 planet Gliese #g 37 Fred Espenak 37 Icelandic geologist 37 amateur astronomer 37 Galilean satellites 37 tornadic thunderstorm 37 smoky odor 37 rainbow colored sheen 37 cosmic microwave radiation 37 planets orbiting distant 37 Col Dave Lapan 37 mock warhead 37 Type 1a supernova 37 volcanic moon Io 37 Uninhabited Aerial Vehicle 37 RXTE 37 Comet Elenin 37 magnetosphere 37 planetary astronomer 37 star Beta Pictoris 37 undersea volcanoes 37 Remotely piloted 37 Mojave Spaceport 37 globulars 37 Pleiades cluster 37 yellowish orange 37 slender crescent moon 37 X ray observatories 37 distant supernovae 37 orbiting Kepler telescope 37 Lt. Col. Yang Liwei 37 UDFy # 37 phytoplankton bloom 37 Hellas Basin 37 refrozen ice 37 volcano lava dome 37 microbursts 37 astronomical phenomena 37 Allan Kenitzer 37 KT boundary 37 Horsehead Nebula 37 constellation Sagittarius 37 gravitational waves 37 Sagittarius B2 37 sunlight glinting 37 solitary slender 37 planemos 37 COROT 37 blinding flash 37 produce colorful auroras 37 Rossby waves 37 Konacki 37 Telescope BAT 37 Titan 4B 37 Kuiper Belt object 37 distant galaxies 37 Solar flares 37 Geminid meteors 37 sunlike stars 37 sulfate aerosols 37 Col. Jorge Amaral 37 GALEX 37 supernovae 37 Hot Jupiters 37 Minotaur rocket 37 ash cloud 37 dust enshrouded 37 submillimeter 37 auroral oval 37 emit X rays 37 inch Samuel Oschin 37 yellowish 37 volcanic ash plume 37 Bullet Cluster 37 ionizes 37 Kilauea volcano 37 interstellar dust 37 interstellar distances 37 six wheeled rover 37 coronal holes 37 laser altimeter 37 Kosmos 3M rocket 37 space.com 37 Gamma Virginids 37 Kilauea Volcano 37 funnel cloud darkened 37 fiery sunsets 37 energetic gamma rays 37 thunderheads 37 moon Phobos 37 funnel clouds 37 Mount Merapi spews 37 COROT 7b 37 planets 37 astrophysicists 37 wispy clouds 37 Volcano spews 37 earthlike planets 37 Iceland Eyjafjallajokull volcano 37 planets circling 37 waning gibbous moon 37 comets 37 RRATs 37 quark gluon plasma 37 zodiacal constellations 37 Kitt Peak 37 aerobatic maneuver 37 Earth ionosphere 37 thin wispy clouds 37 Billowing smoke 37 Shuttle Carrier 36 #x# binoculars [001] 36 skywatchers 36 Encke gap 36 hospital rooftop helipad 36 fog 36 Romi Shaked 36 Jupiter Uranus 36 coronal mass ejections CMEs 36 rainbow arched 36 cloudy sky 36 dusty haze 36 silicate dust 36 starscape 36 Lynn Lunsford 36 craters 36 Gamma ray bursts 36 coppery red 36 Carina constellation 36 convective 36 Kuiper belt object 36 Waterspouts 36 extragalactic 36 spinning clockwise 36 unmanned reconnaissance plane 36 tiny meteoroids 36 runaway thermonuclear 36 van Arkel discovery 36 moons circling 36 explosive eruptions 36 Frick radioed 36 Saturn outermost ring 36 atmospheric aerosols 36 heavily cratered 36 radar Aridi 36 nebular 36 flybys 36 clouds scudding across 36 Arabia Terra 36 Comet #P/Holmes 36 Recriminations erupt 36 towering plume 36 Wimer speculated 36 Mount Katla 36 grayish 36 NASA LCROSS 36 molten rocks 36 cabin depressurized 36 mesocyclone 36 Meteor shower 36 brightest meteors 36 asteroids orbiting 36 waning gibbous 36 Astrophysics Cambridge Mass. 36 Scattered clouds 36 planets astronomers 36 Waythomas 36 dust mote 36 snow squall