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(Click for frequent words.) 62 cirrus clouds 61 vapor trails 61 Contrails 61 jet contrails 59 contrail 53 vortices 52 accretion disks 51 chemtrails 51 vapor trail 50 wispy cirrus clouds 50 cumulus clouds 50 aerosol particles 50 cirrus 50 cumulus cloud 49 cirrus cloud 49 spicules 49 Rossby waves 48 galactic cosmic rays 48 blazar 48 lenticular clouds 48 Cosmic rays 48 afterglows 48 gamma ray emission 47 thunderclouds 47 water vapor 47 smoke plumes 47 stratus clouds 47 plumes 47 Noctilucent clouds 47 blazars 47 interstellar clouds 47 moonlets 47 aerosols 47 sonic booms 47 Earth orbiting satellites 47 atmospheric aerosols 46 gravitational waves 46 TGFs 46 exhaust plume 46 energetic electrons 46 volcanic plume 46 noctilucent clouds 46 wake vortices 46 cosmic rays 45 molten droplets 45 Meteor showers 45 downbursts 45 sonic boom 45 clouds 45 sulfuric acid droplets 45 puffy clouds 45 Saturn rings 45 meteoroid 45 parabolic arcs 45 meteoroids 45 upper troposphere 45 Herbig Haro 45 galactic disk 45 zodiacal light 45 gamma ray bursts GRBs 45 sunspots 45 X ray wavelengths 44 Saturn auroras 44 X ray emission 44 Alfven waves 44 comet Tempel Tuttle 44 plume 44 Supernovae 44 updrafts 44 photochemical reactions 44 X ray pulses 44 GRBs 44 Swift Tuttle 44 Digitized Sky Survey 44 Helix Nebula 44 sundog 44 fainter objects 44 planetary nebulae 44 billowing clouds 43 Gravitational waves 43 spherically symmetric 43 volcanic plumes 43 Spiral galaxies 43 tropospheric ozone 43 magnetotail 43 sulfate aerosol 43 relativistic particles 43 towering cumulus clouds 43 Saturn aurora 43 ionosphere 43 droplets 43 cosmic ray flux 43 atmospheric chemistry 43 convective clouds 43 dust devils 43 cometary debris 43 atmospheric turbulence 43 chemtrail 43 sulfate aerosols 43 sulfate salts 43 faint galaxies 43 icy moons 43 HII regions 43 emits X rays 43 Doppler shifts 42 chromosphere 42 atmospheric haze 42 protoplanetary disks 42 CMB photons 42 distant supernovae 42 antimatter particles 42 Computer simulations 42 ionospheric 42 Hawking radiation 42 troposphere 42 meteors 42 atmospheric moisture 42 particles 42 filamentary structures 42 mesosphere 42 earthshine 42 accretion disk 42 lava domes 42 soot particles 42 Saturnian moon 42 circular orbits 42 gamma ray flashes 42 atmospheric phenomena 42 molten magma 42 martian atmosphere 42 Gamma rays 42 atmospheric 42 ultraviolet wavelengths 42 solar prominences 42 Chemtrails 42 cosmic radiation 42 cumulonimbus 42 elongated orbits 42 comet Hale Bopp 42 Earth ionosphere 42 spacetime 42 puffy cumulus clouds 42 Magellanic Stream 42 supernova explosions 42 wispy clouds 42 Kuiper Belt Objects 42 solitons 42 UV photons 42 ice crystals 42 Earth magnetotail 42 planetary orbits 42 TRMM satellite 42 inversion layer 42 proplyds 42 interstellar magnetic 42 solar minima 42 chem trails 41 luminous galaxies 41 novae 41 magnetospheric 41 ionized hydrogen 41 streaked overhead 41 helium atoms 41 radiative forcing 41 microbursts 41 cumulous clouds 41 polar caps 41 gravitational interactions 41 polar vortex 41 Lyman alpha 41 icy comets 41 comets orbiting 41 micro meteorites 41 sooty particles 41 starburst galaxy 41 RS Ophiuchi 41 Bernoulli Principle 41 polar stratospheric 41 scramjet engines 41 spatial disorientation 41 KBOs 41 planets orbits 41 exosphere 41 supernovas 41 ENAs 41 supernova remnants 41 moonlet 41 deep convective clouds 41 coronal loops 41 optical wavelengths 41 downwelling 41 Type Ic supernovae 41 RHESSI 41 electron orbits 41 planetary atmospheres 41 convective 41 Saharan dust 41 ultrashort pulses 41 Encke gap 41 protostars 41 clouds obscuring 41 prominences 41 chondrules 41 bluish 41 ionised 41 sulphate particles 41 vapor cloud 41 muons 41 Carefully cautiously 41 diffraction pattern 41 Leonids 41 airbursts 41 Rayleigh scattering 41 relativistic jets 41 volcanic eruptions 41 graphite whiskers 41 X ray telescopes 41 distant quasars 41 Delta Aquarids 41 X ray afterglow 41 Steven Cummer 41 Nitrogen oxides 41 fluorescent nanoparticles 41 nebulae 41 polar mesospheric clouds 41 Doppler shift 41 planets atmospheres 41 RS Oph 41 Saturn moon Mimas 41 auroral 41 stratocumulus clouds 41 outermost planets 41 greenhouse warming 41 meteorite impacts 41 sulfate particles 41 Bill Borucki Kepler 41 planetary nebula 41 magnetic monopoles 41 thruster firings 41 specular reflection 41 craters 40 flood basalts 40 albedo 40 active galactic nucleus 40 poleward 40 supercooled liquid 40 cumulus 40 refrozen ice 40 gamma ray flares 40 Waterspouts 40 Astrophysical 40 starburst galaxies 40 P/# A2 40 auroral activity 40 Orionid meteors 40 tidal tails 40 anthropogenic CO2 emissions 40 Ulysses spacecraft 40 cosmic ray 40 diffraction patterns 40 cosmological distances 40 supernova remnant 40 altocumulus 40 X ray photons 40 Cosmic Microwave Background 40 polar latitudes 40 supernovae 40 Leonid meteors 40 elliptical orbits 40 temperature inversions 40 Magellanic Clouds 40 carbon dioxide concentrations 40 gamma ray bursts 40 aerosol concentrations 40 phytoplankton blooms 40 nonpolar 40 Higgs bosons 40 cryovolcanism 40 sleek twin engined 40 cloudscapes 40 gravitational radiation 40 Orionid 40 Saturn magnetosphere 40 sulphate aerosols 40 lava flows 40 iridescence 40 astrophysical phenomena 40 relativistic protons 40 stubby wings 40 solar corona 40 Relativistic 40 skies 40 emit gamma rays 40 Circinus X 1 40 Perseid meteors 40 Geminids 40 Type Ia supernovas 40 Aerosols 40 atmospheric disturbances 40 Gamma ray bursts 40 ejecta 40 filamentary structure 40 orbiting planets 40 nebulosity 40 gamma rays 40 subtropics 40 gamma ray burst 40 backscattered 40 periodicities 40 W boson 40 magnetic fields 40 obscuration 40 volcanic aerosols 40 jet contrail 40 sunlike stars 40 gamma ray photons 40 scramjets 40 cometary material 40 oppositely directed 40 quasar 40 chlorine peroxide 40 Foro Italico gusty winds 40 starbursts 40 absorption spectra 40 helium nuclei 40 thin wispy clouds 40 hazy skies 40 coronal holes 40 superfluids 40 galaxies collide 40 lunar crust 40 Muons 40 aurora 40 southern latitudes 40 ash plumes 40 microphysical 40 cumulonimbus clouds 40 comet tail 40 cosmic ray intensity 40 ramjets 40 brownish haze 40 Substorms 40 Nasa spacecraft 40 fireball streaking 40 hypersonic speeds 39 AGNs 39 blobs 39 vapor 39 galactic cores 39 cosmic phenomena 39 photochemical smog 39 liquid droplets 39 Venusian atmosphere 39 interstellar particles 39 polarimetry 39 Lightning flickered 39 Type 1a supernovae 39 tiny airborne particles 39 constellation Perseus 39 splotches 39 swirling vortices 39 THEMIS satellites 39 reddish glow 39 redshifted 39 planets asteroids 39 antiparticles 39 corona 39 Kuiper belt objects 39 hypernova 39 sodium atoms 39 ecliptic plane 39 magnetars 39 galaxy redshift 39 spiral nebulae 39 coronal heating 39 radiational 39 exo planets 39 supersymmetric particles 39 sunspot activity 39 SN #A 39 Kuiper Belt objects 39 sun ultraviolet radiation 39 chlorine monoxide 39 masers 39 Orionids 39 reddish orange color 39 oscillations 39 infrared wavelength 39 spaser 39 axions 39 electromagnetic flux 39 photosphere 39 Canadell 39 radiative 39 emitted photons 39 brightest meteors 39 Milankovitch cycles 39 Sunspots 39 diffuse aurora 39 distant galaxies 39 gluon 39 brightnesses 39 mistiness 39 spectroscopic measurements 39 Imaging Spectroradiometer MODIS instrument 39 explosive eruptions 39 parabolas 39 Sagittarius dwarf galaxy 39 microquasar 39 noble gases 39 rime ice 39 optical illusion 39 climate modellers 39 WIMPs 39 nebula 39 galaxy formation 39 pions 39 Comet Hale Bopp 39 galaxies 39 Icelandic volcano spitting 39 laser pulses 39 NASA STEREO 39 novas 39 substorm 39 auroras 39 periodic dimming 39 supernovae explosions 39 thermosphere 39 comet 39 proto planetary disks 39 comets 39 millisecond pulsars 39 UFOs 39 protoplanet 39 Laser beams 39 aurorae 39 dirty snowballs 39 intrinsic brightness 39 NEAs 39 pulsating aurora 39 Pleiades star 39 atmospheric CO2 levels 39 Martian dust 39 atmospheric pollutants 39 Iridium satellites 39 Perseids 39 ecliptic 39 cosmic microwave background 39 tiny specks 39 sky 39 Quadrantids 39 superluminal 39 dusty disks 39 atmospheric circulation 39 cinder cones 39 astronomical phenomena 39 comets asteroids 39 periodic oscillations 39 lightwaves 39 dynamical processes 39 red supergiants 39 midlatitude 39 ozone concentrations 39 neutron star 39 astronomical objects 39 cosmic strings 39 astrophysicists 38 ionized gas 38 haze 38 thermonuclear reactions 38 De Pontieu 38 quasiparticles 38 Comet Halley 38 computer simulations 38 sun irradiance 38 Guhathakurta 38 branes 38 condensation nuclei 38 lattice vibrations 38 atmospheric concentrations 38 predawn sky 38 olivine mineral 38 interstellar dust clouds 38 Petoukhov 38 midlatitudes 38 magnetospheres 38 tidally 38 THz radiation 38 outer corona 38 spherules 38 white puffy clouds 38 circularly polarized light 38 Milky Way Galaxy 38 filaments 38 Tropical Storm Neki 38 geologist Jennifer Adleman 38 tiny droplets 38 Andromeda Galaxy 38 interstellar dust 38 particle acceleration 38 meteor 38 asteroids comets 38 ionized gases 38 circumstellar disks 38 temperature gradients 38 auroral displays 38 spacecraft flyby 38 submillimeter wavelengths 38 submillimeter 38 Earthlike 38 ozone 38 Veniaminof 38 coronal loop 38 cosmic collisions 38 neutralinos 38 Mate Adamkovics 38 polygon patterns 38 superstrings 38 El Niños 38 Comet Tempel Tuttle 38 X ray observatories 38 submillimeter galaxies 38 Comet Hartley 2 38 Mpc 38 Meridiani 38 hadrons 38 coronal mass ejections CMEs 38 solar flares 38 Heymsfield 38 William Bottke 38 coronal 38 planets comets 38 superheated gases 38 equatorial regions 38 hind wings 38 Extrasolar planets 38 moon Io 38 nebulas 38 Solar flares 38 dust mote 38 W bosons 38 Microbursts 38 visible wavelengths 38 Robin Canup 38 gravity warps 38 phosphorescence 38 spectral fingerprint 38 IBEX spacecraft 38 proton collisions 38 spiral galaxies 38 tholins 38 tropospheric 38 planetary alignments 38 THEMIS spacecraft 38 Galileo spacecraft 38 Aurora Borealis 38 galactic mergers 38 mantle plumes 38 fog 38 faint wisps 38 ultraviolet UV radiation 38 femtosecond timescale 38 supercell storms 38 Galilean moons 38 infra red radiation 38 Alfvén waves 38 spokesman Bambang Sulistyo 38 Maunder minimum 38 CMEs 38 Voyager spacecraft 38 magnetic excitations 38 Recriminations erupt 38 atmospheric circulations 38 magma ocean 38 surface temperatures SSTs 38 fluffy clouds 38 Jovian atmosphere 38 spiral galaxy NGC 38 Jenniskens 38 planetary magnetospheres 38 ionised gas 38 Fred Prata 38 Ultraviolet rays 38 Tempel Tuttle 38 Lyrids 38 manmade CO2 emissions 38 volcanic lava flows 38 active galactic nuclei 38 micrometeoroids 38 solar nebula 38 V# Mon 38 infalling 38 CMB radiation 38 airglow 38 airborne particles 38 numerical simulations 38 SMBH 38 aerosol measurements 38 circumstellar 38 unmanned probes 38 Hanny Voorwerp 38 Ring Nebula 38 supervolcanoes 38 Bose Einstein condensates 38 striations 38 aether 38 occultations 38 Evolution Explorer 38 rotating neutron stars 38 Comet Encke 38 supersonically 38 trajectories 38 Kharecha 38 Cassini flybys 38 anthropogenic aerosols 38 cosmologists 38 spectral measurements 38 airflows 38 Astrophysics Cambridge Mass. 38 smoggy haze 38 temporal variability 38 SMBHs 38 glaciers 38 shorter wavelengths 38 slender crescent 38 constellation Aquarius 38 type Ia supernovae 38 wingbeats 38 antiparticle 38 rotational axis 38 uncontrolled airspace 38 crystalline silicates 38 vortexes 38 Cherenkov radiation 38 infrared imagery 38 Geminid 38 soot 38 quark gluon plasma 38 interacting galaxies 38 blueness 38 Aerosol particles 38 thunderhead 38 interferogram 38 heliospheric 38 polar craters 38 Vortex Merger Sub 37 galactic collisions 37 advection 37 galactic magnetic 37 sulphates 37 galactic halo 37 GQ Lupi 37 stiff crosswinds 37 micron wavelengths 37 flashlight beams 37 flapping wings 37 Comet Hartley 37 tornadic activity 37 stippling 37 aldehydes 37 galactic bulge 37 volcanic ashes 37 tropopause 37 underwing 37 Earthlike planets 37 galaxy M# [002] 37 distant galaxy 37 ultrafine particles 37 solar irradiance 37 katabatic winds 37 stealth bombers 37 planetary surfaces 37 infrared satellite imagery 37 Uninhabited Aerial Vehicle 37 electron beams 37 foreground galaxy 37 nanotubes 37 isobars 37 Chladni 37 Hubble observations 37 sunspot 37 quasars 37 Martian gullies 37 SPICAM 37 inhabitable planets 37 cloud microphysics 37 De Havilland Comet 37 GRB# 37 mid latitudes 37 hydrated minerals 37 GLAST telescope 37 Saturn moons 37 Virgo Cluster 37 giant elliptical galaxy 37 volcanic ash clouds 37 VLJs 37 geomagnetic storms 37 Sonic booms 37 Friis Christensen 37 STEREO spacecraft 37 refractions 37 assumed planets circling 37 gravitational wobbles 37 anticyclonic 37 mesospheric 37 antineutrinos 37 retrograde orbits 37 breathing scramjet engine 37 HD#b 37 haloes 37 Hot Jupiters 37 Epsilon Aurigae 37 anthropogenic warming 37 waning crescent 37 mesocyclone 37 planetary embryos 37 flightpath 37 binary asteroids 37 Quadrantid 37 merging galaxies 37 infrared telescopes 37 ultraviolet sunlight 37 thick haze 37 Saturnian moons 37 gyres 37 comet orbit 37 windshear 37 cosmic ray collisions 37 Comet Lulin 37 stratospheric ozone 37 Bethany Ehlmann 37 photons 37 emphasize numeric keypad 37 nucleons 37 flying saucers 37 Jonathan Lunine 37 hypersonic missiles 37 spectral fingerprints 37 planetesimals 37 thunderheads 37 lavas 37 compass headings 37 extratropical cyclones 37 volcanoes erupt 37 Ordovician extinction 37 meteor impacts 37 volatilized 37 Neil Gehrels 37 clouds scudding across 37 streaking diagonally across 37 paleoclimatologists 37 extragalactic 37 globulars 37 interferometers 37 lightning flashes 37 incorrect airspeed 37 remotely piloted drones 37 elliptical galaxies 37 Aqua satellite 37 Bullet Cluster 37 penumbral shadow 37 Iceland Grimsvoetn volcano 37 Nitrogen dioxide 37 GRB #B 37 powdery dust 37 electromagnetic signals 37 ionized particles 37 Cepheids 37 pollutants emitted 37 gravitational lensing 37 axial tilt 37 Infrared Pathfinder Satellite 37 observables 37 smoker vents 37 towering thunderheads 37 alien civilizations 37 faraway galaxies 37 neutron stars 37 NASA Wilkinson Microwave 37 interstellar dust grains 37 GJ #b [002] 37 superheated plasma 37 hydroxyl radicals 37 Sobakam 37 grayish hue 37 Leonid meteor 37 haziness 37 wisps 37 Hyades cluster 37 covered Delio Macchi 37 Prevailing winds 37 luminosities 37 Strong northerly winds 37 cosmic ray particles 37 ozone depletion 37 sterile neutrino 37 Galilean satellites 37 blue skies 37 stratospheric aerosols 37 horseshoe shaped crater 37 Enceladus 37 Particulates 37 solar radii 37 vorticity 37 redshifts 37 Earth magnetosphere 37 interstellar boundary 37 magnetar 37 evanescent waves 37 elemental abundances 37 interstellar distances 37 Epsilon Eridani 37 crustal thickness 37 Velicogna 37 supergiant stars 37 helicopter rotors 37 Soot 37 Martian atmosphere 37 amateur skywatchers 37 diffract 37 phyllosilicates 37 Reiner Gamma 37 mist 37 magnetic reconnection 37 frequent mock dogfights 37 Firefighting helicopters 37 Trifid Nebula 37 Martian craters 37 lensing galaxy 37 dust enshrouded 37 particles emitted 37 volcanic activity 37 Climate alarmists 37 Type Ia supernova 37 disagreeable odor 37 streaking diagonally 37 condensation 37 anomalously warm 37 MODIS 37 observable phenomena 37 rustling leaves 37 Fermions 37 smoggy atmosphere 37 Higgs particle 37 meteoroid impacts 37 Cosmic Radiation 37 infrared ultraviolet 37 isoprene 37 supermassive black hole 37 upwellings 37 X ray emitting 37 reflectance 37 coccolithophores 37 whooshing sound 37 baryon acoustic oscillations 37 Mission TRMM satellite 37 nucleosynthesis 37 Joel Primack 37 supercooled 37 oceanic circulation 37 wind shear 37 atmospheric ozone 37 Alamaro 37 lava cascading 37 meteor streaks 37 hydrocarbon haze 36 energetic gamma rays 36 quasiparticle 36 Thick clouds 36 Andromeda galaxy 36 comet McNaught 36 raindrops 36 anthropogenic emissions 36 comet nuclei 36 Einstein relativity theory 36 extrasolar planetary systems 36 Fermi telescope 36 ULP cepheids 36 waning gibbous 36 tropical latitudes 36 sfumato 36 reflection nebula 36 underwings 36 lava eruptions 36 steering currents 36 extraterrestrial UFOs 36 Gemini constellation 36 speckle pattern 36 Mercury exosphere 36 silicon atoms 36 energetic cosmic rays 36 sunbursts 36 wavefronts 36 gravitational perturbations 36 carbonate globules 36 cosmological theories 36 Fred Espenak 36 AERONET 36 Lidia Morawska 36 Gamma ray 36 performing aerobatic maneuvers 36 KH #D 36 airspeed indicator 36 meteor sightings 36 respiratory irritants 36 celestial objects 36 volcano ash 36 kaons 36 HD #b [002] 36 UV radiation 36 blotches 36 Vertical wind shear 36 subsonic speeds 36 Bonnie Buratti 36 vertical tail fin 36 cerulean sky 36 singularities 36 neutrino mass 36 Svensmark 36 crewed spacecraft 36 yellowish orange 36 Jupiter magnetosphere 36 antimatter particle 36 turbojets 36 Peter Jenniskens 36 celestial bodies 36 polaritons 36 Unidentified Flying Object 36 duststorms 36 supercell 36 carcinogenic compounds 36 isotherms 36 Galactic cosmic rays 36 icy crust 36 substorms 36 atmospheric carbon dioxide 36 fractal patterns 36 ejecta blanket 36 protoplanets 36 Martian dust devils 36 gases emitted 36 impactors 36 abrasive particles 36 engines flamed 36 graupel 36 vegetation greenness 36 La Niñas 36 B meson 36 stratus 36 XMM Newton observations 36 strangelets 36 eclipsing binary 36 Saturn moon Enceladus 36 spores 36 takeoffs landings 36 poles flanking 36 convective storms 36 Magnetars 36 Red Rectangle 36 AB Aurigae 36 electrons 36 icy moon Enceladus 36 astrophysical objects 36 Carolyn Porco 36 geostationary orbits 36 El Ninos 36 incorrect airspeed indications 36 colder drier 36 Wilkinson Microwave Anisotropy Probe 36 Albedo 36 planetoids 36 noctilucent cloud 36 Halley comet 36 lunar dust 36 meteoritic 36 Neuchatel observatory 36 airplane contrail 36 Anthony Remijan 36 lightening flashes 36 permanently shadowed craters 36 tropical troposphere 36 bosonic 36 Jovian planets 36 astrometry 36 gravitational redshift 36 belt polymetallic 36 spokesman Jorge Amaral 36 gamma ray observatory 36 electronic excitations 36 Milankovitch 36 optical telescopes 36 Lelaie 36 Klekociuk 36 Geminids meteor shower 36 dust particles 36 situ measurements 36 cloudiness 36 Quadrantid meteor shower 36 membrane pores