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(Click for frequent words.) 57 Amateur astronomers 57 Astronomy buffs 54 galaxies nebulae 52 Spitzer infrared 51 Earth orbiting satellites 51 magnify objects 51 moonless nights 51 planetary Transits 51 star gazers 51 infrared telescopes 50 Comet #P 50 unaided eye 50 MG J# +# 50 exoplanetary 50 Saturnian moon Titan 50 astrophysical phenomena 50 X ray telescopes 50 Fermi telescope 50 astronomy buffs 50 constellations planets 50 comet Lulin 50 fireball streaking 50 astrophysical objects 49 stargazers 49 gamma ray observatory 49 Perseus Cluster 49 http:/www.nasa.gov/cassini 49 Gamma ray Large 49 noctilucent 49 IBEX spacecraft 48 THEMIS satellites 48 Coma Cluster 48 sunlike stars 48 skygazers 48 meteor streaks 48 gravitational lenses 48 orbiting telescopes 48 submillimetre 48 India Science Popularization 48 skywatchers 48 Taurid 48 fainter objects 48 optical telescopes 48 cosmic phenomena 48 NASA Gamma ray 47 distant supernovae 47 comet Hale Bopp 47 sky gazers 47 celestial phenomena 47 amateur astronomers 47 WISE infrared 47 Chilean Atacama Desert 47 galaxy M# [001] 47 detect neutrinos 47 spiral galaxy NGC 47 earthlike planets 47 telescopes 47 retrograde orbit 47 Heliospheric Observatory SOHO 47 moons circling 47 Cat Paw Nebula 47 interplanetary spacecraft 47 planetary nebulas 47 auroral displays 47 Coma cluster 47 relativistic jets 47 Saharan Desert 47 submillimetre wavelengths 47 Samuel Oschin Telescope 47 Skywatchers 47 ESA XMM Newton 47 cosmic cannibal 47 protons collide 47 microshutters 47 renowned astrophysics observatory 46 celestial fireworks 46 Stargazers 46 supersymmetric particles 46 Solar Dynamics Observatory 46 cosmological distances 46 HIRES spectrometer 46 Convection Rotation 46 orbiting Chandra 46 globular star 46 Galilean moons 46 Astrophysicists 46 Nasa Kepler 46 spacecraft Cassini 46 inky blackness 46 thrilling stargazers 46 inch Samuel Oschin 46 faraway planets 46 puffy cumulus clouds 46 butterflies flitting 46 Cancri e 46 COROT exo 3b 46 Pleiades cluster 46 sized planets orbiting 46 visit http:/saturn.jpl.nasa.gov 46 SkyCenter 46 telescopes astronomers 46 Galilean satellites 46 N. Rathnasree 46 glowing brightly 46 moons orbiting Saturn 46 X ray observatory 46 Helix Nebula 46 astronomical observatories 45 Noctilucent clouds 45 eclipse chasers 45 detect gravitational waves 45 detect gamma rays 45 Comet Hartley 2 45 occultations 45 Deep Impact flyby spacecraft 45 NASA STEREO 45 constellation Eridanus 45 horned larks 45 CoRoT satellite 45 gigapixel camera 45 Solar TErrestrial RElations Observatory 45 http:/saturn.jpl.nasa.gov 45 star Fomalhaut 45 exo planets 45 lightning flashes 45 Chajnantor plateau 45 X ray binary 45 ESO VLT 45 solar prominences 45 Infrared Pathfinder Satellite 45 dust enshrouded 45 asteroids comets 45 Lightning flickered 45 AERONET 45 hexagonal mirrors 45 globular cluster M# 45 fading afterglow 45 habitable worlds 45 floodlights illuminating 45 gazed skyward 45 spiral galaxy Messier 45 constellation Cetus 45 glowworms 45 radiotelescope 45 planets circling stars 45 polar mesospheric clouds 45 assumed planets circling 45 millisecond pulsars 45 extrasolar 45 ecliptic plane 45 gravitationally lensed 45 Comet Encke 45 glowing orbs 45 distant galaxy clusters 45 meteor fireball 45 moon Io 45 supernovae explode 45 treeless expanse 45 Martian rovers 45 Helicopters buzzed 45 SuperWASP 45 planets orbiting distant 45 faint galaxies 45 celestial observations 45 pulsating aurora 45 planets atmospheres 45 observatories 45 Cerro Paranal 45 planets moons 45 planets orbiting stars 44 Hanny Voorwerp 44 occulted 44 bluish glow 44 HARPS instrument 44 astronomical telescopes 44 Comet Lulin 44 HD# [002] 44 Clouds obscured 44 Astrophysical Research 44 amateur astronomers peering 44 astronomical telescope 44 meteor streaking 44 icy moon Enceladus 44 astronomers 44 ghostly glow 44 Jovian moons 44 inch refractor telescope 44 Submillimeter Array 44 snakes slither 44 Planetary Transits 44 XMM Newton satellite 44 Gamma ray bursts 44 faraway galaxies 44 Relations Observatory STEREO 44 Kuiper belt objects 44 active galactic nuclei 44 Earthlike 44 Elenin 44 Cygnus Lyra region 44 rover panoramic 44 necks craned 44 Astronomers 44 Higgs bosons 44 Earthlike planets 44 synchrotron x ray 44 floating orbs 44 Comet Holmes 44 GJ #b [002] 44 crater pocked 44 supergiant star 44 inhabitable planets 44 Cometary 44 particle detectors 44 Interstellar Boundary Explorer 44 Perseid meteor showers 44 Epsilon Aurigae 44 meteors streaking 44 Globular clusters 44 Garan rode 44 inflatable planetarium 44 Laser Interferometer Gravitational Wave 44 Fomalhaut b 44 amateur skywatchers 44 Martians invading 44 smallest exoplanet 44 extrasolar planetary systems 44 X ray observatories 44 NASA THEMIS 44 merging galaxies 44 celestial spectacle 44 Great Orion Nebula 44 Wiccans worship 44 funnel cloud darkened 44 Fermi Telescope 44 endless expanse 44 constellations Cygnus 44 Telescopes 44 dimly visible 44 neutrino particles 44 sunlike star 44 spaceweather.com 44 Virgo Cluster 43 Chajnantor 43 afterglows 43 icy comets 43 Explorer WISE 43 zap boulders 43 GJ #b [001] 43 Quadrantid meteor shower 43 starshade 43 coronal holes 43 meteor streaked across 43 Anthony Remijan 43 NEOSSat 43 planetarium dome 43 Ring Nebula 43 Space Telescope GLAST 43 constellation Centaurus 43 astrophotographer 43 X ray wavelengths 43 Kepler spacecraft 43 sharks sea turtles 43 constellation Hydra 43 Telescope Array 43 Meteor Shower 43 Perseid meteor 43 Observatory SDO 43 Aurigid 43 Mission SRTM 43 Spectrograph 43 Franck Marchis 43 ultraviolet imaging spectrograph 43 Titan Saturn 43 Trifid Nebula 43 Atacama Large Millimeter submillimeter 43 HARPS spectrograph attached 43 Exoplanet 43 Magnetic Imager HMI 43 Neutron stars 43 clouds billow 43 Array ALMA 43 distant supernovas 43 Huygens descent 43 Observatory Very 43 Jupiter moons 43 telescope eyepiece 43 supergiant stars 43 coronal loops 43 cluster NGC 43 brownish haze 43 periodic dimming 43 spectral bands 43 Kuiper Belt Objects 43 celestial objects 43 Nasa Mars Reconnaissance 43 nebulas 43 Near Infrared Camera 43 lunar equator 43 skywatching 43 ray Space Telescope 43 gaze skyward 43 Bonneville Crater 43 total solar eclipse 43 spinning neutron stars 43 Cloud Aerosol Lidar 43 Muchachos Observatory 43 STEREO spacecraft 43 energetic electrons 43 Saturn moons 43 stargazer 43 stellar nurseries 43 aperture telescope 43 moons Phobos 43 interacting galaxies 43 earthshine 43 volcanic lava flows 43 gray smoke billowed 43 gravitational microlensing 43 Jupiter moon Io 43 orbiting gamma ray 43 robotic telescopes 43 butterflies flitted 43 highly elliptical orbits 43 Martin Gutoski 43 particle physicists 43 planetary embryos 43 Pleiades star 43 astronomical objects 43 distant quasar 43 Martian craters 43 asteroid Lutetia 43 Beta Pictoris b 43 NASA CloudSat 43 Helioseismic 43 StarDate 43 Dynamics Observatory 43 altocumulus clouds 43 glow worms 43 LOFAR 43 PSR B# +# 43 Fornax cluster 42 hurling fireball 42 unmanned probes 42 Saturn Cassini 42 infrared astronomy 42 Orion nebula 42 starburst galaxy 42 Cosmic rays 42 Extrasolar 42 ESA Planck 42 MicroFUN 42 High Angular Resolution 42 Exoplanets 42 binocular telescope 42 phosphorescent glow 42 darkened skies 42 spacecraft orbited 42 axions 42 aurorae 42 Microlensing Follow Up 42 drift lazily 42 ultraviolet wavelengths 42 shadowy craters 42 circumstellar disks 42 Faint Object 42 MEarth 42 Celery Fields 42 galactic halo 42 Rosette Nebula 42 exhaust plume 42 permanently shadowed regions 42 star clusters nebulae 42 IYA# 42 creatures inhabiting 42 dusty disks 42 outer corona 42 Optical Gravitational Lensing Experiment 42 distant suns 42 rumbling thunder 42 Kepler Space Telescope 42 barred spiral galaxy 42 celestial phenomenon 42 orbiting Hubble Space Telescope 42 planets comets 42 planets orbiting sun 42 retroreflector 42 Sky gazers 42 wispy cirrus clouds 42 portable planetarium 42 ESA Integral 42 HiRISE camera aboard 42 Martian crater 42 Planck satellite 42 Dust devils 42 planets orbits 42 habitable planets 42 Space Infrared Telescope 42 GigaGalaxy Zoom 42 comets meteors 42 Scientists theorized 42 HESS telescopes 42 infrared observatory 42 Hawaii van Dokkum 42 X ray pulses 42 Science Popularisation Association 42 habitable zones 42 Earthlike planet 42 starlike object 42 Thick smoke drifted 42 Saturn moon Mimas 42 Observatory telescope 42 spaceborne 42 Comet Hartley 42 X ray Observatory 42 PKS #-# 42 Geminids meteor shower 42 Lyrid meteor shower 42 Area Telescope LAT 42 predawn sky 42 annual Perseid meteor 42 twinkling stars 42 bird's eye views 42 Thermal Emission Spectrometer 42 spookfish 42 galaxy NGC 42 Nasa spacecraft 42 extraterrestrial UFOs 42 stargaze 42 orbital solitude 42 ionised gas 42 reddish glow 42 Gamma ray 42 orient themselves 42 extrasolar planets orbiting 42 galaxy M# [002] 42 magnetars 42 Ulysses spacecraft 42 Delta Aquarids 42 blazars 42 solar corona 42 astronomical observations 42 comet McNaught 42 tholins 42 Chamberlin Observatory 42 Veil Nebula 42 Keck Interferometer 42 astronomical phenomena 42 blooming azaleas 42 Mien Mien stared emptily 42 Epsilon Eridani 42 nebulae 42 TNOs 42 CoRoT 9b 42 Flares lit 42 Gamma ray burst 42 dust motes 42 exoplanets planets outside 42 absorb photons 42 darkness 42 Galactic cosmic rays 42 Red Rectangle 42 droopy ears stumbling 42 comets asteroids 42 moonless 42 millimeter wavelengths 42 physicists astronomers 42 eagles ospreys 41 COROT 7b 41 Quadrantids 41 NASA Far Ultraviolet 41 faint smudge 41 gamma ray flares 41 airbursts 41 longest solar eclipse 41 fiery sunsets 41 constellation Carina 41 Upsilon Andromedae 41 Rydberg atom 41 exoplanets planets 41 KH #D 41 Great Observatories 41 fiery lava 41 binary asteroid 41 wavelength infrared 41 CHARA 41 fossilized creatures 41 Infrared Array Camera 41 winter wonderlands 41 moons orbiting 41 GALEX 41 Wilkinson Microwave Probe 41 Multi Object Spectrometer 41 Hubble orbits 41 binoculars telescopes 41 faint meteors 41 Saturn moon 41 constellation Cygnus 41 lanternfish 41 Valles Marineris canyon 41 astronomy observatory 41 CDMS experiment 41 Leonid Meteor Shower 41 Landsat satellite 41 Magellanic Clouds 41 radiometers 41 RXTE 41 Ultraviolet Optical Telescope 41 transiting planets 41 constellation Lacerta 41 exo planet 41 clouds scudding across 41 submillimeter wavelengths 41 penetrating radar 41 stratus clouds 41 microlensing 41 goldeneyes 41 SOAR telescope 41 Astrophysical 41 Orbiter MRO 41 zodiacal constellations 41 dimensional atlas 41 gravity warps 41 spotting scopes 41 constellation Hercules 41 upland meadows 41 Saturn outermost ring 41 imaging spectrometer 41 Taurids 41 NASA twin STEREO 41 IRAS #-# 41 constellation Orion 41 RRATs 41 gliding silently 41 masers 41 RS Ophiuchi 41 Geminid meteors 41 protoplanetary 41 Fireworks thundered 41 galactic bulge 41 Saturn magnetosphere 41 NASA Kepler 41 brightest supernova 41 constellation Cassiopeia 41 discover Fomalhaut 41 bagpipers marched 41 sunlight glinting 41 NASA Kepler telescope 41 moon Enceladus 41 blazar 41 spacecraft flyby 41 Omega Centauri 41 southern constellation Carina 41 Herschel telescope 41 clouds scud 41 alien civilizations 41 Arches Cluster 41 Hubble Space Telescope HST 41 Infrared Mapping Spectrometer VIMS 41 Saturn equinox 41 Kepler Mission 41 telescope 41 smoggy atmosphere 41 cinder cones 41 sun corona 41 predawn darkness 41 THEMIS 41 whiz harmlessly 41 Evolution Explorer 41 Racetrack Playa 41 dimming starlight 41 tall prairie grasses 41 asteroids orbiting 41 Pan STARRS telescope 41 moonless sky 41 starless sky 41 constellation Bootes 41 Keck Telescope 41 Astronomy 41 neutrino detectors 41 Andromeda galaxy 41 constellation Andromeda 41 Large Telescope 41 zodiacal light 41 martian landscape 41 Super Earths 41 Trapezium 41 cumulous clouds 41 physicists 41 galactic cores 41 orbiting Hubble telescope 41 Geminid shower 41 Eta Aquarids 41 Popular Astronomy 41 observatory 41 Geminga 41 Ritchey Chrétien 41 NASA EPOXI mission 41 Risinger plotted 41 COROT 41 rocky extrasolar planet 41 Star gazers 41 thunderclouds 41 Interferometer VLTI 41 isolated Himalayan kingdom 41 Jupiter Ganymede 41 Strobe lights 41 SINFONI 41 planetary transits 41 Mission TRMM satellite 41 planets constellations 41 pileated woodpeckers 41 Triangulum Galaxy 41 wispy clouds 41 grassy meadows 41 Lagoon Nebula 41 orbiting planets 41 cosmologists 41 gravitational lens 41 light refracting 41 Lunar eclipses 41 Gravitational waves 41 squinted 41 refracting telescope 41 exoplanets orbiting 41 forest glade 41 Mars moon Phobos 41 Neanderthals roamed 41 Particle physicists 41 inch Schmidt Cassegrain 41 erupting volcanoes 41 Dumbbell Nebula 41 super Earths orbiting 40 celestial object 40 owls hoot 40 LORRI 40 microbial ecosystems 40 orbiting Saturn 40 ESA Herschel 40 Keck telescopes 40 KBOs 40 Context Camera 40 Nikku Madhusudhan 40 Perseid shower 40 cumulus clouds 40 Fra Mauro 40 Hurtling 40 bolometers 40 VY Canis Majoris 40 Saturnian 40 Eridanus 40 huge fireballs exploding 40 spectral fingerprint 40 RHESSI 40 Andromeda Galaxy 40 coronal mass ejections CMEs 40 Cepheid variables 40 X ray afterglow 40 USArray 40 limitless expanse 40 penetrating radars 40 Lulin 40 thermal infrared 40 stargazing 40 snowy mountaintops 40 SIRTF 40 Kilauea Visitor Center 40 binoculars spotting scopes 40 constellation Scorpius 40 Research LTER 40 Lunar eclipse 40 thunderbirds 40 muon neutrino 40 aboard ESA Envisat 40 Pan STARRS 40 outermost planets 40 Orion constellation 40 waning crescent moon 40 Fermi Gamma ray 40 granite spiers 40 flyby Cassini 40 moon Ganymede 40 distant galaxies 40 supermassive 40 birds chirped 40 BP Psc 40 solar radii 40 type Ia supernovae 40 Orbiter LRO 40 orbiting Cassini spacecraft 40 UKIRT 40 painstakingly dissect 40 Applause rippled 40 muon neutrinos 40 ASTRONOMERS 40 mass beachings 40 Keck telescope 40 crab nebula 40 constellation Taurus 40 Orionid 40 microwave radiometers 40 waning gibbous 40 NASA Cassini 40 snowflakes drifting 40 Sidewalk Astronomers 40 Thick smoke obscured 40 Orionids 40 hyper spectral 40 filamentary structure 40 robotic explorers 40 altocumulus 40 VISTA telescope 40 Altai mountains 40 #x# binoculars [001] 40 gaseous planet 40 STEREO mission 40 auroras 40 Astrophysicist 40 lightless 40 red breasted mergansers 40 fireball streaked across 40 noctilucent clouds 40 grassy hillsides 40 Upsilon Andromedae b 40 Aurora borealis 40 sunbeams 40 marshes swamps 40 THEMIS mission 40 NASA Kepler spacecraft 40 astrometry 40 satellites orbiting 40 undulating dunes 40 breeze wafted 40 Perseids Meteor Shower 40 called gravitational microlensing 40 lenticular clouds 40 interstellar boundary 40 Observatory La Silla 40 earth orbiting satellites 40 Stephan Quintet 40 Cherenkov 40 Cassini orbiter 40 featureless landscape 40 Solar flares 40 produce colorful auroras 40 novas 40 waxing crescent 40 infalling gas 40 RY Sagittarii 40 gnarled oaks 40 eclipsing binaries 40 cosmological parameters 40 CERN LHC 40 Omega Nebula 40 Fincke radioed 40 NASA Infrared Telescope 40 Perseid meteor shower 40 #P/Holmes 40 IceCube 40 Zeta Ophiuchi 40 rotating neutron stars 40 extraterrestrial civilizations 40 Pancam 40 particles WIMPs 40 globulars 40 extragalactic 40 radial velocity 40 Neutron Detector 40 Dan Werthimer 40 azure skies 40 orbiting observatories 40 volcanoes erupting 40 lunar landers 40 colliders 40 Telescope LSST 40 Leonid meteor showers 40 fireworks crackled 40 Eta Aquarid meteor shower 40 worms crustaceans 40 luminous galaxies 40 Zacaton 40 rugged highlands 40 celestial 40 VB #b 40 gravitational lensing 40 Crab Pulsar 40 TRMM satellite 40 Searchers scoured 40 Kepler Telescope 40 Canary Telescope 40 microlensing events 40 northern harrier 40 Saturnian moons 40 thin crescent 40 Imaging Spectroradiometer MODIS instrument 40 terrestrial gamma ray 40 circumstellar dust 40 telescope atop Mauna 40 NASA ESA Hubble 40 lunar crater 40 lensing galaxy 39 Sombrero Galaxy 39 Hubble Near Infrared 39 fighter jets streaked 39 Coronal Mass Ejections 39 Cassini flyby 39 fireflies blinking greenish 39 ESO telescope 39 Hang gliders 39 TSN PZ camera 39 Mars orbiters 39 Ground penetrating radar 39 gamma ray detectors 39 Spacewatch 39 galaxies collide 39 sidereal 39 ESO telescopes 39 asteroid collisions 39 radiating outward 39 airglow 39 Educators SPACE 39 Subaru telescope 39 corners strewing 39 Milky Way halo 39 Cosmic Origins Spectrograph 39 proto galaxies 39 sweeping panoramas 39 gamma ray telescope 39 Silhouetted 39 glowing lava 39 IR illuminator 39 polarimetry 39 THEMIS probes 39 Manned missions 39 sunrises sunsets 39 Clearer skies 39 rovers Spirit 39 flightless cormorants 39 UDFy # 39 annular solar eclipse 39 wolves howl 39 Ionosphere Sounding 39 solar eclipses 39 Voorwerp 39 snowy egrets 39 starlit 39 sub glacial lakes 39 constellation Auriga 39 sun peeks 39 X rays gamma rays 39 telescopic observations 39 comets orbiting 39 unmanned robotic 39 PASADENA Calif. Astronomers 39 C1XS 39 radar interferometry 39 Geminid 39 origins spectrograph 39 tarns 39 Jupiter Uranus 39 Nehru planetarium 39 Herschel Space 39 Spectroscopic Explorer 39 Doppler shift 39 creeping inexorably 39 GLAST Burst Monitor 39 distant galaxy 39 astronomer 39 Ultraviolet Imaging Spectrograph UVIS 39 Composite Infrared Spectrometer 39 Cerenkov radiation 39 meteorite hunters 39 solidified lava flows 39 occultation 39 Dobsonian telescope 39 NASA Opportunity rover 39 Extrasolar Planets 39 Barn swallows 39 Saturn moon Iapetus 39 electron neutrinos 39 jovian 39 Unlike solar eclipses 39 fluorescence microscope 39 particle detector 39 Long Wavelength Array 39 strobed 39 faint wisps 39 volcanic moon Io 39 Astrophysics MOA 39 cosmic ray observatory 39 Syrtis Major 39 measureless 39 faraway galaxy 39 Douglas Hudgins Kepler 39 X ray emitting 39 Kuiper Belt objects 39 deformable mirrors 39 auroras borealis 39 reddish hues 39 AU Mic 39 celestial sphere 39 Saturnian system 39 Steward Observatory 39 wildflowers bloom 39 golden fronted bowerbird 39 Space Telescope 39 spectroscopic measurements 39 sky darkens 39 moon Titan 39 NASA ICESat 39 retrograde orbits 39 proplyds 39 Snow buntings 39 innermost planet 39 space lubricated snares 39 Ranging spacecraft 39 infrared telescope 39 Mini Thermal Emission 39 Cancri 39 buildings antennae spans 39 Io Europa 39 inch Alvan 39 bluish tinge 39 compass headings 39 amateur naturalists 39 SpaceWeather.com 39 barren expanse 39 ULP cepheids 39 Nikon D# Kowa 39 volcanic plumes 39 potentially habitable 39 Trojan asteroids 39 Envisat satellite 39 antineutrinos 39 trans Neptunian objects 39 diffuse aurora 39 TrES 4 39 Uninhabited Aerial Vehicle 39 constellation Pegasus 39 Glimpsing 39 Extrasolar Planet Search 39 spectrographs 39 yellow billed cuckoos 39 RAS Observatory 39 optical telescope 39 Lyman alpha 39 vastness 39 IR LEDs 39 thunder boomed 39 Infrared Mapping Spectrometer 39 planemos 39 APEX telescope 39 towering cumulus clouds 39 cloudy sky 39 nightscapes 39 planetary alignments 39 Galaxy Evolution 39 prothonotary warblers 39 THEMIS spacecraft 39 Monashee mountains 39 Bob Pappalardo Cassini 39 illuminate 39 NASA Fermi Gamma 39 flashlight beams 39 Okmok Caldera 39 brightest meteors 39 Orion Nebula 39 drenching rainstorm 39 glow brightly 39 Geminid meteor shower 39 NASA Interstellar Boundary 39 Tien Shan mountains 39 Canes Venatici 39 lighthouse beacon 39 glowing corona 39 CubeSats 39 starry skies 39 neutrino telescope 39 Astrophysics Cambridge Mass. 39 jet contrails 39 gamma ray bursts GRBs 39 HARPS spectrograph 39 partial eclipse 39 substorms 39 gibbous moon 39 galactic nuclei 39 Candles flickered 39 Lunar Reconnaissance Orbiter Camera 39 OGLE TR #b 39 towering peaks 39 Observatory STEREO 39 magnifying lenses 39 cosmic neutrinos 39 Galileo spacecraft 39 EarthScope 39 faint glow 39 permanently shadowed craters 39 castle battlements 39 Taregana 39 Observatories