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(Click for frequent words.) 57 Roque de los 55 supergiant star 55 Muchachos Observatory 55 Cerro Paranal 54 Extremely Large Telescope 54 Telescope LSST 53 constellation Ursa Major 53 constellation Cassiopeia 53 submillimetre 53 orbiting Hubble Space Telescope 52 radiotelescope 52 robotic telescopes 52 Olympus Mons 52 telescopes 52 aperture telescope 52 optical infrared telescope 52 telescope 52 Cerro Pachon 52 Andromeda Galaxy 52 HiRISE camera 51 Keck Telescopes 51 spiral galaxy NGC 51 Galilean moons 51 optical telescope 51 granite spiers 51 Samuel Oschin Telescope 51 hexagonal mirrors 51 telescopic camera 51 astronomical observatories 51 constellation Taurus 51 Chajnantor plateau 51 Eagle Nebula 50 Spitzer infrared 50 astronomical telescope 50 constellation Hercules 50 Lagoon Nebula 50 Array ALMA 50 Gran Telescopio Canarias 50 ESO La Silla 50 constellation Aquila 50 galaxy M# [001] 50 Field Imager 50 Herschel Space 50 Context Camera 50 spiral galaxy M# 50 Observatory Very 50 Fomalhaut b 50 constellation Eridanus 49 Andromeda galaxy 49 HARPS spectrograph attached 49 Butterfly Nebula 49 Keck telescopes 49 La Silla Observatory 49 WISE infrared 49 amateur astronomers peering 49 infrared telescope 49 Chilean Atacama Desert 49 galaxy M# [002] 49 ESO Paranal Observatory 49 TSN PZ camera 49 ESO VLT 49 rover panoramic 49 Ultraviolet Optical Telescope 49 Fermi telescope 49 Sombrero Galaxy 49 Submillimeter Array 49 Cat Paw Nebula 49 Omega Centauri 49 Interferometer VLTI 49 Quadrantid meteor shower 49 HARPS instrument 49 constellations Cygnus 49 constellation Scorpius 48 galaxy NGC 48 constellation Cygnus 48 Cerro Pachón 48 Jovian moons 48 Syrtis Major 48 infrared astronomy 48 asteroid Lutetia 48 Subaru telescope 48 Helix Nebula 48 detect gravitational waves 48 distant quasar 48 Heliospheric Observatory SOHO 48 steering wheel tilts 48 comet Lulin 48 constellation Andromeda 48 Orion Nebula 48 submillimetre wavelengths 48 E ELT 48 fainter objects 48 HARPS spectrograph 48 VISTA telescope 48 Antennae Galaxies 48 Comet Holmes 48 orbiting telescopes 48 interplanetary spacecraft 48 observatories 48 ray Space Telescope 48 smallest exoplanet 47 skygazers 47 constellation Orion 47 AKARI 47 microshutters 47 Delta Cephei 47 TrES 4 47 Teton Range 47 planet Uranus 47 Rosette Nebula 47 Atacama Large Millimeter submillimeter 47 gamma ray observatory 47 Las Campanas Chile 47 Paranal Observatory 47 steerable radio 47 Comet NEAT 47 X ray telescopes 47 lensing galaxy 47 inch refractor telescope 47 occultations 47 Infrared Telescope 47 APEX telescope 47 Paranal 47 exo planets 47 ecliptic plane 47 Nikon D# Kowa 47 Herschel telescope 47 optical telescopes 47 La Silla Chile 47 Pan STARRS 47 Comet Lulin 47 5x optical zoom lens 47 Polarimetry 47 Bug Nebula 47 observatory 47 Palomar Observatory 47 GigaGalaxy Zoom 47 Cerro Paranal Chile 47 slender crescent 47 ALMA antennas 47 ° panoramic 47 infrared telescopes 47 European Extremely Large 47 Arches Cluster 47 moon Io 47 Planck satellite 47 XMM Newton 47 angle 5x zoom 47 eyepiece #/#s f/#.# 46 GJ#b 46 Orionid Meteor Shower 46 Caloris Basin 46 Nasa Kepler 46 GRB #B 46 Ringed Planet 46 Tarantula nebula 46 barred spiral galaxy 46 Carina constellation 46 Cerro Armazones 46 moon Ganymede 46 Galileoscope 46 AB Aurigae 46 orbiting Hubble telescope 46 Epsilon Aurigae 46 satellites orbiting Earth 46 #x Optical 46 Virgo Cluster 46 Gamma ray burst 46 microlensing 46 Hubble Space Telescope HST 46 Lovell Telescope 46 auroral displays 46 Valles Marineris canyon 46 refracting telescope 46 Dumbbell Nebula 46 Leonid Meteor Shower 46 promontories 46 ESO Very Large Telescope 46 Nasa spacecraft 46 G#.# +#.# 46 Large Telescope 46 HiRISE image 46 microlensing events 46 spiral galaxy Messier 46 submillimeter wavelength 46 ESO telescope 46 Atacama Large Millimeter Array 46 astronomer Johannes Kepler 46 Leonid meteor showers 46 ESA XMM Newton 46 constellation Virgo 46 airglow 46 Hellas Basin 46 moons Phobos 46 Horsehead Nebula 46 cosmic cannibal 46 Pleiades cluster 46 celestial sphere 46 atop Mauna Kea 46 Reconnaissance Orbiter 46 Fornax cluster 46 SN #C 46 Ikonos 46 Kuiper belt objects 46 Large Telescope Salt 46 Planck telescope 46 #.#x magnification [001] 46 Very Large Telescope 46 Orion nebula 46 BLG #Lb 46 Ring Nebula 46 Large Binocular Telescope 46 gravitational lenses 45 brightest supernova 45 exoplanets planets outside 45 astronomical observatory 45 periodic dimming 45 extragalactic 45 volcanically active 45 imaging spectrometer 45 exoplanetary 45 PKS #-# 45 La Silla observatory 45 #mm #mm equivalent [001] 45 Peony nebula star 45 cluster NGC 45 TU# [002] 45 Voyager probes 45 earthlike planets 45 mu Arae 45 Upsilon Andromedae b 45 distant supernovas 45 arcminutes 45 stellar occultations 45 UKIRT 45 Southern Observatory ESO 45 cosmic ray observatory 45 gravitational microlensing 45 Solar Dynamics Observatory 45 submillimeter wavelengths 45 magnetars 45 Orionids 45 Arsia Mons 45 LOFAR 45 zodiacal light 45 Voorwerp 45 Mars Orbiter Camera 45 perigee moon 45 astronomers 45 observatory telescope 45 lenticular clouds 45 Delta Aquarids 45 Explorer WISE 45 Thirty Meter Telescope 45 X ray observatory 45 Observatory telescope 45 coyote howling 45 Triangulum Galaxy 45 gaseous planet 45 distant quasars 45 RY Sagittarii 45 Cepheid variables 45 constellation Lyra 45 constellation Draco 45 spacecraft Cassini 45 Martian crater 45 SkyScout 45 granite domes 45 planets orbiting stars 45 NASA STEREO 45 Perseid meteor showers 45 particle smasher 45 polarimetry 45 glacially carved 45 Eta Carinae 45 gravitational keyhole 45 microscopic imager 45 Cerro Tololo 45 Carina Nebula 45 Venusian surface 45 C1XS 45 reflection nebula 45 cosmological distances 45 Burst Alert 45 RS Ophiuchi 45 planetary Transits 45 magnificent vistas 45 photometer 45 Partial lunar eclipse 45 transiting planet 45 Cygnus Lyra region 45 HIRES spectrometer 45 infrared ultraviolet 45 extrasolar 45 luminous galaxies 45 sunlike stars 45 Dynamics Observatory 44 VLBA 44 curved mirrors 44 constellation Aquarius 44 constellation Lacerta 44 astronomical objects 44 infrared LEDs 44 COROT exo 3b 44 Methone 44 Kepler #b 44 Keck Interferometer 44 thin crescent 44 Telescope 44 Saturnian moons 44 exoplanets planets 44 Perseid Meteor Shower 44 MG J# +# 44 Adaptive optics 44 WM Keck Observatory 44 earthshine 44 exo planet 44 Heliospheric Observatory 44 Faint Object 44 rocky extrasolar planet 44 Comet McNaught 44 Carl Zeiss Tessar lens 44 Chajnantor 44 inch Vari Angle 44 constellation Centaurus 44 Multi Object Spectrograph 44 star Fomalhaut 44 Orionid meteor shower 44 X ray afterglow 44 WIYN telescope 44 X ray telescope 44 e MERLIN 44 Celestron 44 dimming starlight 44 cinder cones 44 Cassini spacecraft 44 X ray binary 44 transiting planets 44 extrasolar planets orbiting 44 located atop Mauna 44 astronomical telescopes 44 Quadrantids 44 neutrino telescope 44 Mauna Kea volcano 44 Dan Buhl Planetarium 44 inch Schmidt Cassegrain 44 Great Orion Nebula 44 constellation Bootes 44 Geminid meteor showers 44 Astronomers Find 44 Arecibo telescope 44 El Teide 44 telescope atop Mauna 44 Large Synoptic Survey 44 orbiting gamma ray 44 fading afterglow 44 Large Binocular Telescope LBT 44 gigapixel camera 44 Beta Pictoris 44 Telescope Array 44 fissure eruption 44 Eta Aquarid meteor shower 44 radar altimetry 44 planets Uranus 44 ultraluminous galaxy 44 Mars Reconnaissance Orbiter 44 inch Samuel Oschin 44 astronomer Percival Lowell 44 orbiting observatories 44 resolution panchromatic 44 HiRISE camera aboard 44 earth orbiting satellites 44 Subaru Telescope 44 Optio P# 44 GRB # 44 EarthScope 44 Convection Rotation 44 planets orbiting sun 44 Amateur astronomers 44 distant supernovae 44 Virgo cluster 44 THEMIS satellites 44 starburst galaxy 44 gamma ray telescope 44 Ellery Hale 44 MPG ESO 44 inhabitable planets 44 infrared observatory 44 Cancri 44 emission nebula 43 Infrared Survey Telescope 43 Suzaku X ray 43 thrilling stargazers 43 supervolcanoes 43 Zeiss projector 43 Kepler observatory 43 Pan STARRS telescope 43 Fresnel lenses 43 asterism 43 Orionid meteors 43 Valles Marineris 43 distant galaxy 43 Small Magellanic Cloud 43 tallest lighthouse 43 GALEX 43 coronal loops 43 Perseus Cluster 43 Mars moon Phobos 43 domed lookout 43 X ray observatories 43 distant galaxy clusters 43 Geminga 43 circumstellar disks 43 cosmic magnifying glass 43 astrophotographer 43 aurora borealis 43 adaptive optics 43 Pinwheel Galaxy 43 Mauna Kea Hawaii 43 spacecraft orbiting 43 celestial spectacle 43 Gornergrat 43 Telescope BAT 43 Toutatis 43 orbit GEO 43 Galilean satellites 43 awe inspiring landscapes 43 southern constellation Carina 43 Aurora borealis 43 twin Keck telescopes 43 Venus transits 43 KH #D 43 celestial object 43 Coma Cluster 43 CMB radiation 43 star Proxima Centauri 43 Field Imager WFI 43 HD #b [001] 43 celestial observations 43 COROT 43 ultra telephoto 43 brightest comet 43 #mm telephoto 43 Science Experiment HiRISE 43 submillimeter 43 exoplanets orbiting 43 GROND 43 STEREO spacecraft 43 4X optical zoom 43 fireball streaking 43 electronic viewfinders 43 Orion constellation 43 Las Campanas Observatory 43 Saharan Desert 43 supernovae explode 43 asteroids orbiting 43 circular aperture 43 Sojourner rover 43 SKA telescope 43 constellation Auriga 43 Stephan Quintet 43 inch refracting telescope 43 cosmic microwave radiation 43 breathtaking vista 43 galaxy NGC# 43 elliptical galaxy NGC 43 DISR 43 trans Neptunian objects 43 Earth Asteroid 43 comet nucleus 43 Giovanni Cassini 43 Stellarium 43 retroreflector 43 spiral nebulae 43 Tarantula Nebula 43 mySKY 43 Mars Orbiter 43 Optical Gravitational Lensing Experiment 43 protons collide 43 protoplanetary 43 VLTI 43 Rosetta spacecraft 43 Cassini orbiter 43 coronal mass ejections CMEs 43 constellation Sagittarius 43 sized planets orbiting 43 constellation Hydra 43 Arecibo radar 43 TGFs 43 celestial objects 43 Gamma ray bursts 43 annual Perseid meteor 43 defile Mauna Kea 43 Zeta Ophiuchi 43 GJ #b [002] 43 Proxima Centauri 43 5Mp 43 mega pixel sensor 43 revolutionized astronomy 43 Exoplanet 43 waning crescent Moon 43 Uranus Jupiter 43 reflector telescope 43 SINFONI 43 interacting galaxies 43 meteor streaks 43 flyby Cassini 43 APXS 43 Saturnian system 42 Evolution Explorer 42 orbiter Cassini 42 INTEGRAL satellite 42 twin Voyager spacecraft 42 Kielder Observatory 42 electro optical sensors 42 #.#x zoom 42 Lyrid meteor shower 42 gamma ray flares 42 CoRoT satellite 42 ENVISAT 42 moon Charon 42 Olympus SZ 42 Beehive Cluster 42 Noctilucent clouds 42 Meteor Shower 42 Nikkor lens 42 skywatching 42 Lyrids 42 outer corona 42 vari angle 42 infrared 42 astrophysical phenomena 42 SNR #-#.# 42 circular polarization 42 constellation Cetus 42 interstellar dust particles 42 faraway galaxies 42 Caplio R2 42 #mm zoom lens [001] 42 Thick smoke obscured 42 infrared wavelength 42 planets orbits 42 Lunar Reconnaissance Orbiter Camera 42 #mm #mm equiv 42 orbiting observatory 42 Galaxy Evolution 42 binoculars spotting scopes 42 longest solar eclipse 42 Red Rectangle 42 gamma ray burst 42 Aurigid 42 neutrino particles 42 refurbished Hubble Space 42 Resolution Imaging 42 Saturn Cassini 42 Comet Halley 42 USArray 42 Observatory La Silla 42 Sumatra Andaman earthquake 42 Eridanus 42 moon Enceladus 42 Pleiades 42 BLG #L 42 ROSAT 42 Optical microscopes 42 Giant Magellan Telescope 42 HD# [002] 42 faint smudge 42 constellation Canis Major 42 Ted Molczan Canadian 42 German astronomer Johannes 42 lightwaves 42 HM Cancri 42 Hanny Voorwerp 42 foreground galaxy 42 Geminid meteor shower 42 meter Keck telescopes 42 NASA MESSENGER spacecraft 42 Viking Lander 42 celestial fireworks 42 Panoramic Survey 42 THEMIS Image 42 Michibiki 42 radio occultation 42 planets constellations 42 Krakatoa erupted 42 Candor Chasma 42 Cosmic Origins Spectrograph 42 Io Europa Ganymede 42 starlike object 42 velocity Planet Searcher 42 radiosondes 42 #x# binoculars [002] 42 retrograde orbit 42 diopter adjustment 42 Cassini flyby 42 Extrasolar planets 42 Ritchey Chrétien 42 sandstone spiers 42 PureColor LCD II 42 F/#.# 42 3in LCD screen 42 optical wavelengths 42 Diviner instrument 42 WMAP satellite 42 Earth orbiting satellites 42 Gemini telescopes 42 panoramic camera 42 #X zoom lens 42 CoRoT #b 42 wavefront distortion 42 Heterodyne Instrument 42 Andromeda Galaxy M# 42 Tharsis Rise 42 Solar Orbiter 42 Perseids meteor shower 42 unaided eye 42 Dennis Mammana 42 constellation Leo 42 Active Galactic Nuclei 42 Interferometer 42 Global Surveyor 42 8X optical zoom 42 Iapetus Saturn 42 GLAST Burst Monitor 42 outermost planets 42 Compton Gamma Ray 42 NASA ESA Hubble 42 Rathnashree 42 RAS Observatory 42 Epsilon Eridani 42 spiral galaxy 42 airborne observatory 42 #P/Churyumov-Gerasimenko 42 globular cluster M# 42 orbiting telescope 42 Cassegrain telescope 42 PASADENA Calif. Astronomers 42 #x magnification [002] 42 HESS telescopes 42 orbiter robotic arm 42 parabolic troughs 42 Extrasolar Planets 42 Henize #-# 42 Lightning flickered 42 geosynchronous satellites 42 Envisat satellite 42 WFC3 42 laser altimeter 42 Iapetus 42 rock outcrop 42 fisheye lenses 42 gamma ray burst GRB 42 Magellan telescopes 42 Laser Interferometer Gravitational Wave 42 Siding Spring 42 nebula 41 energetic gamma rays 41 Cosmic Origins Spectrograph COS 41 microquasar 41 astrometry 41 Crab Pulsar 41 Express orbiter 41 William Herschel Telescope 41 Spitzer infrared spectrograph 41 aurora australis 41 massifs 41 asteroid Vesta 41 constellation Pegasus 41 rainbow arching 41 #x# binoculars [001] 41 Astronomers 41 constellation Vulpecula 41 domed cupola 41 Omega Nebula 41 Milky Way Galaxy 41 super perigee moon 41 Taurids 41 Comet Elenin 41 Hubble astronomers 41 Meade mySKY 41 NGC# 41 concave mirrors 41 SDSS II 41 Submillimeter 41 Infrared Thermal Imaging Spectrometer 41 Saturnian moon Titan 41 astronomical observations 41 eclipsing binary 41 Astronomy buffs 41 DC Vario Elmar 41 star gazers 41 Keck Telescope 41 Chile La Silla 41 waxing crescent 41 Las Cumbres Observatory 41 ESA Envisat 41 Helioseismic 41 SN #A 41 4x zoom lens 41 inner asteroid belt 41 Solar TErrestrial RElations Observatory 41 Fresnel lens 41 LROC 41 Extrasolar Planet 41 Trapezium 41 sky gazers 41 planet orbiting 41 Canes Venatici 41 Skywatchers 41 Bok globules 41 red supergiant 41 ESO PR 41 basalt cliffs 41 GJ #b [001] 41 Libra constellation Vogt 41 SuperWASP 41 Hubble Ultra 41 called gravitational microlensing 41 occultation 41 Tauri Sb 41 lunar perigee 41 Perseids Meteor Shower 41 neutrino detectors 41 Mars rovers Spirit 41 Halemaumau 41 spaceborne 41 Jaggar Museum 41 spinning pulsar 41 ESA Planck 41 Wilkinson Microwave Probe 41 Jupiter Ganymede 41 moon Deimos 41 Mission SRTM 41 Supernova #A 41 substorms 41 Panoramic Camera 41 zodiac constellations 41 orbits Saturn 41 Veil Nebula 41 lunar orbits 41 f/#.# aperture 41 aurorae 41 Telescopes 41 SIRTF 41 gravitational lens 41 twister swirl 41 penumbral shadow 41 extrasolar planetary systems 41 brown dwarfs stellar 41 polar mesospheric clouds 41 Solar Observatory 41 solar radii 41 Observatory SDO 41 KBOs 41 constellation Carina 41 found circling Gliese 41 Cloud Aerosol Lidar 41 3X zoom lens 41 aperture 41 colliders 41 Popular Astronomy 41 exoplanet orbiting 41 parabolic antenna 41 aboard ESA Envisat 41 Digital IXUS i 41 Refractor 41 Keck telescope 41 Sol Duc Falls 41 Shuttle Radar Topography 41 Swiftcurrent Lake 41 Astronomers Discover 41 X ray pulses 41 interferograms 41 Kuiper Belt Object 41 Field Infrared Survey 41 star Gliese 41 Perseus constellation 41 ESO telescopes 41 ESA Integral 41 Gamma ray 41 interferometric technique 41 SOHO spacecraft 41 millisecond pulsars 41 extrasolar planet 41 Apophis asteroid 41 Comet Hartley 2 41 lava tubes 41 ESA Herschel 41 graceful curving 41 PSR B# 41 panoramic vistas 41 Earthscope 41 martian landscape 41 Geminid Meteor Shower 41 smallest extrasolar planet 41 Perseid meteor shower 41 Hubble Near Infrared 41 neutrino detector 41 astro comb 41 SELENE 41 Historical Imagery 41 SeaWiFS 41 High Resolution Imaging 41 wraparound veranda 41 Geminids 41 RXTE 41 irregularly shaped asteroid 41 astrophysical objects 41 laser altimetry 41 Spinosaurus 41 supergiant stars 41 FinePix S#FS 41 dust enshrouded 41 XMM Newton observatory 41 UDFy # 41 exoplanet hunter 41 Four Thirds camera 41 astronomy observatory 41 concentrating photovoltaics CPV 41 Very Large Array 41 Rosetta orbiter 41 USGS Hawaiian Volcano 41 durable twin rovers 41 Corona Australis 41 Near Infrared Camera 41 heliopause 41 #mm telephoto lens 41 star clusters nebulae 41 Mars orbiter 41 SpaceWeather.com 41 THEMIS spacecraft 41 ecliptic 41 shortwave infrared 41 5X optical zoom 41 Gamburtsev 41 Crab Nebula 41 volcanic moon Io 41 X ray wavelengths 41 planet Nibiru 41 HD#b 41 SOAR telescope 41 Comet LINEAR 41 Hubble telescope 41 satellites orbiting 41 Habitable Planets 41 Raman molecular spectroscopy 41 auroras 41 penumbral lunar eclipse 41 rare wekiu bug 41 Digitized Sky Survey 41 gamma ray detectors 41 Mont Blanc Massif 41 nebulas 41 moons circling 41 planets orbiting 41 NASA CloudSat 41 tilt zoom 41 Descent Imager Spectral Radiometer 41 Hobby Eberly 41 MODIS instrument 41 radiometers 41 Hubbles 41 radial velocities 41 astronomical phenomena 41 Perseid shower 40 optical interferometry 40 cosmic particles 40 crab nebula 40 gamma ray detector 40 breathtaking panoramic views 40 XTE J# 40 Jupiter Uranus 40 sunlight glinting 40 lunar equator 40 smallest exoplanets 40 VLT telescope 40 Lunar eclipse 40 renowned astrophysics observatory 40 panorama 40 Sky gazers 40 elongated orbits 40 Hipparchus 40 Pluto Charon 40 Upsilon Andromedae 40 YU# 40 Fujifilm FinePix REAL 40 equatorial bulge 40 Australian SKA Pathfinder 40 Beta Centauri 40 unbroken expanse 40 spinning neutron stars 40 zap boulders 40 starshade 40 comet Tempel Tuttle 40 GRB# 40 Astrophysical Research 40 tsunamis recur 40 #x magnification [001] 40 celestial equator 40 BepiColombo 40 # Apophis 40 swirling dust devils 40 planets moons 40 ESA Rosetta 40 undersea volcanoes 40 Beta Pictoris b 40 #x zoom [001] 40 Ray Spectrometer 40 sunspot cluster 40 parabola shaped 40 Hawaii van Dokkum 40 Cepheus 40 Trifid 40 magnetic compass 40 infrared wavelengths 40 unmanned spacecraft 40 craggy peaks 40 Planetary Camera 2 40 hyper spectral 40 Great Observatories Origins 40 Global Surveyor spacecraft 40 astronomer Ptolemy 40 electrochromatic 40 telescope Uranus 40 FinePix S#HD 40 X ray beams 40 meteor shower 40 Dwarf Planet 40 Rangefinders 40 Cydonia region 40 Mont Sainte Victoire 40 X ray detector 40 interferometer 40 Dobsonian 40 constellation Puppis 40 waxing gibbous moon 40 unmanned probes 40 alpine vistas 40 refractors 40 Mössbauer 40 telescopes binoculars 40 Type Ia supernovas 40 AU Mic 40 Giant Dipper roller coaster 40 orbital solitude 40 innermost planet 40 Cometary 40 spiral stairway 40 inky sky 40 aperture lens 40 X ray binaries 40 RS Oph 40 ASKAP 40 microlensing technique 40 comet Hale Bopp 40 Dynamics Observatory SDO 40 rotating neutron stars 40 IBEX spacecraft 40 Auger Observatory 40 electro chromatic 40 medieval cathedrals 40 Pudong skyline 40 Monoceros 40 Earth ionosphere 40 giant elliptical galaxy 40 Kuiper Belt object 40 pentaprism viewfinder 40 Capricornus 40 Breathtaking views 40 parabolic dish 40 stargazers 40 Astrophysics MOA 40 Spitzer Infrared Array 40 NASA THEMIS 40 moons orbiting 40 Dual Image Stabilization 40 perigee closest 40 infrared imager 40 reredos 40 waning gibbous 40 Shrikes 40 Everest Lhotse 40 Ulysses spacecraft 40 ATST 40 particle detectors 40 SolarBeam 40 VIRTIS instrument 40 auroral emissions 40 laser trackers 40 interstellar dust clouds 40 SIM PlanetQuest 40 Pleiades star 40 noctilucent clouds 40 Lick Observatory 40 Large Magellanic Cloud 40 V# Puppis 40 flyby spacecraft 40 breathtaking views