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(Click for frequent words.) 62 Upsilon Andromedae b 61 Samuel Oschin Telescope 60 moons Phobos 60 COROT 7b 60 Nasa spacecraft 60 comets orbiting 60 moons orbiting 60 Ringed Planet 60 planetary Transits 60 sized planets orbiting 60 retrograde orbit 60 Muchachos Observatory 60 planets circling stars 59 Uranus Neptune 59 smoothest flattest spot 59 exo planets 59 Saturn moon Mimas 59 Wilkinson Microwave Probe 59 Lunokhod 59 smallest exoplanet 59 Giovanni Cassini 59 Galilean moons 59 Elenin 59 NASA THEMIS 59 EPOXI spacecraft 59 Planetary Transits 59 Cassini flyby 58 Titan smoggy 58 gaseous planet 58 orbiting gamma ray 58 Comet Hartley 2 58 interstellar dust particles 58 starlike object 58 Geminga 58 Cassini flybys 58 Enceladus flybys 58 Uranus Jupiter 58 Stephan Quintet 58 Io Europa 58 Charon Pluto 57 orbiting observatories 57 airglow 57 NASA ICESat 57 Ring Nebula 57 Corot 7b 57 Saturn moons Enceladus 57 moons circling 57 CoRoT 9b 57 volcanic moon Io 57 exoplanets planets 57 whiz harmlessly 57 OGLE TR #b 57 Evolution Explorer 57 Saturn Cassini 57 HiRISE camera aboard 57 Cancri e 57 planet Gliese #g 57 Solar TErrestrial RElations Observatory 57 submillimetre wavelengths 57 extrasolar 57 moon Mab 57 constellation Carina 57 Titan flyby 57 hunting Kepler telescope 57 telescopic observations 57 COROT 57 ultraviolet imaging spectrograph 56 sunlike stars 56 moon Ganymede 56 Pleiades cluster 56 spacecraft Cassini 56 Earthlike planet 56 planets orbiting sun 56 CoRoT satellite 56 KBOs 56 lunar meteorites 56 Phoebe orbits 56 rocky extrasolar planet 56 smallest exoplanets 56 Earthlike planets 56 star Spica 56 inhabitable planets 56 planet HD #b 56 slender crescent 56 Mercury exosphere 56 GJ #b [002] 56 icy moons 56 NASA Far Ultraviolet 56 Planck satellite 56 orbited Jupiter 56 Fomalhaut b 56 Beta Pictoris b 56 CoRoT 7b 56 http:/saturn.jpl.nasa.gov 56 van Arkel discovery 56 Convection Rotation 56 Voyager spacecraft 56 icy moon Enceladus 56 Nasa Kepler 56 innermost planet 56 Kuiper belt objects 56 Ulysses spacecraft 56 Hyakutake 56 planets orbiting stars 56 Upsilon Andromedae 56 Jovian moons 56 NASA Cassini 56 Great Orion Nebula 56 X ray observatories 56 Galilean satellites 56 discover Fomalhaut 56 visit http:/saturn.jpl.nasa.gov 56 cosmic cannibal 56 HD#b 56 planets Uranus 56 moon Phobos 55 thin crescent 55 ray Space Telescope 55 sunlike star 55 constellation Eridanus 55 Epsilon Eridani 55 NASA EPOXI mission 55 Gliese #G 55 Kepler 9c 55 planetary nebulas 55 Fermi telescope 55 heavily cratered 55 Titan flybys 55 Jupiter Ganymede 55 protoplanet 55 Libra constellation Vogt 55 planets orbiting distant 55 gamma ray observatory 55 lunar crust 55 Manned missions 55 comet McNaught 55 inch Samuel Oschin 55 twin Voyager spacecraft 55 outer corona 55 choking irritants 55 retrograde orbits 55 McDonald Aeberli Funeral Home 55 constellation Vulpecula 55 ESA XMM Newton 55 Saturnian 55 Michael Studinger 55 Viking orbiters 55 exosphere 55 ESO VLT 55 Syrtis Major 55 interplanetary spacecraft 55 Cassini spacecraft orbiting 55 exoplanets orbiting 55 Comet Machholz 55 polarimetry 55 icy comets 55 Saturn Enceladus 55 Saturn moons 55 Kepler Telescope 55 infrared telescopes 55 PSR B# 54 Comet Hale Bopp 54 Bug Nebula 54 Saturnian system 54 lunar equator 54 Mars Pathfinder lander 54 faint galaxies 54 Cassini Image 54 Mars Neptune Uranus 54 Perseus Cluster 54 Ontario Lacus 54 Huygens descent 54 BP Piscium 54 Viking landers 54 Herschel Space Telescope 54 NASA rover Spirit 54 WMAP satellite 54 distant supernovae 54 THEMIS satellites 54 Wilkinson Microwave Anisotropy Probe 54 Heliospheric Observatory 54 Comet #P 54 Comet Hartley 54 moon Enceladus 54 constellation Cetus 54 amateur astronomers peering 54 Krimigis 54 submillimeter wavelengths 54 orbiting Cassini spacecraft 54 Cassini Huygens spacecraft 54 Toutatis 54 Keck telescope 54 Extrasolar planets 54 Noctilucent clouds 54 Nikku Madhusudhan 54 MG J# +# 54 Saturn outermost ring 54 unmanned probes 54 X ray observatory 54 Saturnian moon 54 Descent Imager Spectral Radiometer 54 Galaxy Evolution 54 orbital solitude 54 astronomical objects 54 Delta Cephei 54 Viking Lander 54 thrilling stargazers 54 Cassini 54 exoplanet orbiting 54 Chandra Observatory 54 noctilucent clouds 54 Kepler Space Telescope 54 P/# A2 54 rover Sojourner 54 plasma spectrometer 54 extrasolar planets orbiting 54 Epoxi 54 supergiant stars 54 IRC +# 54 X ray wavelengths 54 Jupiter moon Io 54 Hubble Near Infrared 54 closest flyby 54 Saturnian moon Titan 54 Cygnus Lyra region 54 constellation Cassiopeia 54 Mars Uranus 54 Neutron Spectrometer 54 gamma ray flashes 54 dimming starlight 54 luminous galaxies 54 Hubble orbits 54 planet Uranus 54 constellation Piscis Austrinus 54 ESA Herschel 54 radio occultation 54 elongated orbits 53 radial velocity technique 53 MARSIS radar 53 Martian meteorites 53 Anisotropy Probe WMAP 53 Kuiper Belt Objects 53 Orbiter LRO 53 Galileo spacecraft 53 constellation Pisces 53 super perigee moon 53 Multi Object Spectrograph 53 Comet Lulin 53 gravitational lenses 53 Scientists theorized 53 ARRL AMSAT 53 Quadrantid meteor shower 53 submillimetre 53 detect gravitational waves 53 interacting galaxies 53 Crab Pulsar 53 stellar occultations 53 exoplanetary 53 Mauna Kea Hawaii 53 Diviner instrument 53 transiting exoplanets 53 Earthlike 53 Svedhem 53 TSN PZ camera 53 APXS 53 submillimeter galaxies 53 constellation Virgo 53 galaxy M# [001] 53 potentially habitable 53 Solar Dynamics Observatory 53 GALEX 53 super Earths 53 Suzaku X ray 53 comets asteroids 53 Orbiter MRO 53 Giovanni Schiaparelli 53 Neptune Uranus 53 Steins asteroid 53 Mandushev 53 COROT exo 3b 53 Mars Saturn Uranus 53 NASA Landsat 53 Gliese #e 53 Heliospheric Observatory SOHO 53 exoplanetary systems 53 Voyager Galileo 53 lobate scarps 53 Kepler spacecraft 53 geyser plumes 53 Cosmic Background Explorer 53 Comet Holmes 53 Ranging spacecraft 53 constellation Lacerta 53 BLG #Lb 53 Kepler #b 53 RHESSI 53 Saturn equinox 53 astrophysical phenomena 53 Asteroid Belt 53 Gravitational lensing 53 subsurface ocean 53 spacecraft orbited 53 YOUR HOROSCOPE 53 hydrated minerals 53 particle analyzers 53 Sojourner rover 53 protoplanetary 53 transiting planets 53 cosmic microwave radiation 53 GJ#b 53 NASA Spacecraft 53 WASP #b 53 retroreflector 53 Near Infrared Camera 52 Comet Halley 52 RRATs 52 IBEX spacecraft 52 comet flyby 52 STEREO spacecraft 52 Composite Infrared Spectrometer 52 flyby Cassini 52 Galactic cosmic rays 52 moons Io 52 tholins 52 Mössbauer 52 Hale Bopp 52 Hot Jupiters 52 Jupiter Uranus 52 Exoplanet 52 Mars Color Imager 52 auroral displays 52 lunar highlands 52 Io Europa Ganymede 52 buckypaper virtually 52 Omega Nebula 52 occultations 52 Kraken Mare 52 ESA ASI 52 Global Surveyor spacecraft 52 windshield wiper maneuver 52 asteroid flyby 52 polar orbits 52 spacecraft flyby 52 orbit GEO 52 dusty disks 52 Wolszczan 52 interstellar dust clouds 52 intrinsic brightness 52 constellation Hercules 52 lunar perigee 52 GOCE satellite 52 Astrological lore 52 Helix Nebula 52 X ray telescopes 52 double helix nebula 52 prograde 52 Grillmair 52 spiral galaxy Messier 52 VB #b 52 brightest supernova 52 eyepiece #/#s f/#.# 52 outermost planets 52 Heterodyne Instrument 52 graphite whiskers 52 fainter objects 52 coronal loops 52 Jupiter moons Europa 52 HiRISE image 52 Franck Marchis 52 NASA Voyager spacecraft 52 Saturn magnetosphere 52 Neutral Mass Spectrometer 52 Global Surveyor 52 Churyumov Gerasimenko 52 earthshine 52 ultraviolet wavelengths 52 Eridanus 52 Mars Uranus Neptune 52 Venus Neptune Uranus 52 orbiting Kepler telescope 52 protoplanetary disks 52 mysterious uncharted 52 Virgo Cluster 52 Isidis Planitia 52 Mercury Uranus 52 constellation Cygnus 52 Gamma ray bursts 52 Epimetheus 52 moon Io 52 Climate Sounder 52 millisecond pulsars 52 Methone 52 NASA rovers Spirit 52 planetary nebulae 52 Dominique Cassini 52 NASA twin rovers 52 waxing crescent 52 VIRTIS instrument 52 Earth magnetotail 52 NASA Stardust spacecraft 52 constellation Aquarius 52 Lunar Prospector 52 globulars 52 distant quasar 52 extrasolar planets 52 Planck spacecraft 52 Crab Nebula 52 IntergalaticEarth 52 Gliese #c 52 Kepler Mission 52 asteroid Steins 52 exoplanet atmospheres 52 imaging spectrometer 52 Proxima Centauri 52 Multi Object Spectrometer 52 Martian craters 52 exo planet 52 Rosetta spacecraft 52 electron neutrinos 52 THEMIS spacecraft 52 moon Mimas 52 asteroids orbiting 52 olivine mineral 52 rover Opportunity 52 comet Churyumov Gerasimenko 52 constellation Centaurus 52 muon neutrinos 51 GZK cutoff 51 Coma Cluster 51 AB Aurigae 51 orbiter Cassini 51 NASA Fermi Gamma 51 Cosmologists 51 comet nuclei 51 lunar module Eagle 51 Saturn aurora 51 Mate Adamkovics 51 orbiting Saturn 51 orbits Saturn 51 microquasar 51 Epsilon Aurigae 51 Herschel telescope 51 Ian McShane Pillars 51 Shuttle Atlantis blasts 51 spacecraft Chandrayaan 1 51 filamentary structure 51 radial velocity 51 TrES 4 51 exoplanets planets outside 51 XMM Newton satellite 51 Carina constellation 51 planemos 51 asteroid Eros 51 Greenbelt Md. manages 51 THEMIS Image 51 LAGEOS 51 infrared spectrograph 51 ESA Cluster 51 Voyager probes 51 Martian equator 51 Jovian moon 51 Cassini Finds 51 NASA Wilkinson Microwave 51 Libra adore 51 Lagoon Nebula 51 Pleiades star 51 Cassini Huygens 51 moons Europa 51 SMM J# 51 GLAST telescope 51 moonlet 51 Mars moon Phobos 51 SIRTF 51 Infrared Pathfinder Satellite 51 Cancri 51 nightglow 51 constellation Sagittarius 51 Vulpecula 51 Mpc 51 Nasa Mars Reconnaissance 51 Magnetars 51 millisecond pulsar 51 Climate Experiment GRACE 51 meteor fireball 51 Relations Observatory STEREO 51 Mercury magnetosphere 51 gravitational perturbations 51 PASADENA Calif. Astronomers 51 VLBA observations 51 Neptune Jupiter 51 auroras 51 gamma ray flares 51 hexagonal mirrors 51 CMB radiation 51 ESA ERS 51 Red Rectangle 51 Maunder minimum 51 NASA Cassini spacecraft 51 Geminid shower 51 XMM Newton 51 HD #b [001] 51 Spitzer Space Telescopes 51 planets astronomers 51 Deep Impact eXtended Investigation 51 Huygens lander 51 Envisat satellite 51 ultraluminous galaxy 51 Antennae Galaxies 51 synchronous polar 51 Cerro Paranal 51 polar mesospheric clouds 51 onboard Chandrayaan 51 Comet #P/Churyumov-Gerasimenko 51 blazars 51 X ray binary 51 ESA Integral 51 http:/www.nasa.gov/cassini 51 Spitzer infrared 51 Goldilocks planet 51 X ray pulses 51 JPL manages 51 Martian dust 51 Saturn moon Enceladus 51 supersymmetric particles 51 ESA Planck 51 rover Spirit landed 51 NASA QuikScat satellite 51 Oort Cloud 51 moon Deimos 51 amateur skywatchers 51 planets comets 51 Coma cluster 51 Quaoar 51 Orionids 51 ESA SMART 51 mere fly bys 51 Fermi Telescope 51 Bullet Cluster 51 Voyager spacecraft flew 51 QuikScat failed 51 electric ion propulsion 51 constellation Aquila 51 Gliese #d 51 impactor spacecraft 51 X ray spectrometer 51 hypervelocity stars 51 Cassini imaging 51 zodiacal light 51 elliptical orbits 51 Hubble Space Telescope HST 51 giant gaseous planets 51 Mini SAR 51 Chilean Atacama Desert 51 HD #b [002] 51 Landsat satellites 51 rover panoramic 51 Viking Orbiter 51 distant galaxy clusters 51 extrasolar planet 51 Martian rovers 51 WISE telescope 51 Cassini Huygens Mission 51 star Fomalhaut 51 Moon Mineralogy Mapper M3 51 magnetars 51 habitable planets 51 Sara Seager 51 proton antiproton 51 submillimeter wavelength 51 Jupiter icy moons 51 atmospheric circulations 51 SeaWiFS 51 Anthony Remijan 51 shadowy craters 51 Io volcanoes 51 ROSAT 51 Cosmic rays 51 Saturnian moons 51 composite infrared spectrometer 51 Gerhard Schwehm 51 Reconnaissance Orbiter 51 CoRoT #b 51 planets orbits 51 spiral nebulae 51 Caloris 51 reentry capsule 51 Mars Jupiter Uranus 51 ULP cepheids 51 Laura Schlessinger shifts 50 highly elliptical orbits 50 extrasolar planetary systems 50 Cosmic Microwave Background 50 emit X rays 50 VIRTIS 50 WISE mapped 50 constellation Puppis 50 distant quasars 50 zodiacal dust 50 Aqua satellite 50 extrasolar worlds 50 Cassini orbiter 50 located atop Mauna 50 periodic dimming 50 Valles Marineris 50 aurorae 50 rotating neutron stars 50 satellites orbiting Earth 50 La Silla observatory 50 gravitational microlensing 50 Pinwheel Galaxy 50 OMEGA instrument 50 star Gliese 50 neutral mass spectrometer 50 X ray afterglow 50 Wassonite 50 pulsating aurora 50 Martian crater 50 Ocean Salinity SMOS 50 lunar craters 50 Saturn rings 50 Saturn moon 50 baryonic matter 50 Helios 2B 50 Super Earths 50 Konacki 50 Orion constellation 50 NEAR Shoemaker 50 Rosetta lander 50 UDFy # 50 celestial observations 50 axial tilt 50 smoggy atmosphere 50 Mars Odyssey mission 50 Malcolm Fridlund 50 Mini Thermal Emission 50 Observatory STEREO 50 NASA CloudSat 50 assumed planets circling 50 robotic explorer 50 orbital eccentricity 50 waning gibbous 50 AU Mic 50 Europa Orbiter 50 asteroid Vesta 50 bedrock outcropping 50 AERONET 50 cosmic phenomena 50 Venusian atmosphere 50 Peter Capak 50 detect gamma rays 50 astrometry 50 Saturn Moons 50 galactic mergers 50 Spectroscopic Explorer 50 Scorpio adore 50 Mercury flyby 50 Jupiter moons 50 Nasa Mars Odyssey 50 Express orbiter 50 NASA Lunar Prospector 50 cometary dust 50 antineutrinos 50 Wide Angle Search 50 Gamma ray burst 50 THEMIS Images 50 Venusian surface 50 ESO telescopes 50 constellation Andromeda 50 galactic cosmic rays 50 Nasa Jet Propulsion 50 proplyds 50 lunar orbiting spacecraft 50 gamma ray photons 50 HD# [002] 50 Moderate Resolution Imaging 50 Gravitational waves 50 Taurus Littrow Valley 50 energetic electrons 50 Saturn outermost 50 Opportunity Mars rover 50 stony meteorites 50 particle smasher 50 NASA Cosmic Background 50 moonlets 50 foreground galaxy 50 Comet LINEAR 50 entered lunar orbit 50 WISE spacecraft 50 Son Nghiem 50 Explorer RXTE 50 Comet NEAT 50 spiral galaxy NGC 50 Cat Paw Nebula 50 rocky planets 50 star Proxima Centauri 50 isotopic ratios 50 planetary embryos 50 silicon monoxide 50 Mission SRTM 50 Venus Jupiter Uranus 50 Spectrograph 50 robotic lander 50 Hubble observations 50 magnetospheres 50 afterglows linger 50 waning crescent Moon 50 gravitational tides 50 spinning neutron stars 50 orbiting telescopes 50 Space Telescopes 50 Mars landers 50 asteroid Lutetia 50 carbonaceous chondrites 50 masers 50 RXTE 50 lightweight synthetic aperture 50 Astrophysicists 50 rotational axis 50 carbonate globules 50 celestial sphere 50 Saturn auroras 50 Lunar Reconnaissance Orbiter LRO 50 mu Arae 50 Puppis 50 circumstellar disks 50 orbiting Hubble Space Telescope 50 SPICAM 50 Rosette Nebula 50 Compact Reconnaissance Imaging Spectrometer 50 Tharsis Rise 50 Director Charles Elachi 50 martian meteorites 50 planets orbiting 50 New Horizons spacecraft 50 GRBs 50 Nasa Deep Impact 50 solar nebula 50 Andrea Ghez 50 Extrasolar Planets 50 multiband imaging photometer 50 Kuiper Belt objects 50 infrared wavelengths 50 exoplanets 50 Higgs bosons 50 X ray emission 50 RS Ophiuchi 50 ESA Huygens probe 50 orbital resonance 50 Explorer GALEX 50 BBSNews #-#-# NASA 50 Shallow Subsurface Radar 50 Jean Pierre Bibring 50 Cepheid variables 50 Meen Rashi 50 interstellar particles 50 cosmological observations 50 comet Lulin 50 dwarf spheroidal 50 giant elliptical galaxy 50 inner Oort Cloud 50 zap boulders 50 Triangulum Galaxy 50 hardware Theisinger 50 gaseous planets 50 LORRI 50 NASA Kepler telescope 50 outer planets 50 starburst galaxy 50 #P/Churyumov-Gerasimenko 50 distant galaxy 49 Josefino Comiso 49 Becky Ramotowski 49 de Pater 49 planet Gliese #c 49 GRB #B 49 planet WASP #b 49 Candor Chasma 49 SKY WATCH 49 interstellar cloud 49 Klekociuk 49 telescope atop Mauna 49 phyllosilicates 49 barred spiral galaxy 49 Orion nebula 49 orbiting Chandra 49 astronomical phenomena 49 Invisibility cloak 49 emits X rays 49 Murchison meteorite 49 NYSE DENT 49 Jupiter Saturn 49 RPWS 49 radiotelescope 49 Anisotropy Probe 49 radial velocity measurements 49 Sasselov 49 Martian lander 49 red supergiant 49 cosmic ray particles 49 Surface Composition Spectrometer 49 satellites orbiting 49 transiting exoplanet 49 stellar occultation 49 moonquakes 49 Bill Borucki Kepler 49 NASA Kepler 49 magma ocean 49 cosmological distances 49 geostationary orbits 49 Diviner 49 HARPS instrument 49 Orion Nebula 49 Fionnuala Bourke 49 particle colliders 49 NEAs 49 merging galaxies 49 joins rovers Spirit 49 Huygens spacecraft 49 waning crescent 49 permanently shadowed craters 49 La Silla Observatory 49 NASA WMAP 49 polar vortex 49 geomagnetism 49 infrared spectrometers 49 Zeta Ophiuchi 49 eccentric orbits 49 constellation Scorpius 49 David Spergel 49 spectroscopic measurements 49 constellations Cygnus 49 Chajnantor plateau 49 comet 49 Enceladus flyby 49 geoneutrinos 49 thin crescent moon 49 spherical halo 49 Herschel Space 49 smallest extrasolar planet 49 colliders 49 UKIRT 49 rovers Spirit 49 constellation Libra 49 Mars Odyssey spacecraft 49 Halley comet 49 Explorer WISE 49 silicate dust 49 Infrared Astronomical Satellite IRAS 49 proto cluster 49 ecliptic plane 49 Magellanic Clouds 49 absorbs photons 49 gamma ray observatories 49 spaceweather.com 49 SCISAT 49 accretion disks 49 GA6 49 NASA LCROSS 49 CERN experiments 49 MESSENGER MErcury Surface 49 director Charles Elachi 49 red supergiants 49 blue supergiant 49 Muons 49 planetary orbits 49 radiometric measurements 49 planetary astronomer 49 NASA MESSENGER spacecraft 49 Milankovitch cycles 49 candlelight firelight 49 comet Hale Bopp 49 CDMS experiment 49 Trapezium 49 Eagle lunar lander 49 Beta Pictoris 49 Jonathan Lunine 49 Imaging Spectroradiometer MODIS instrument 49 neutrino mass 49 parachutes malfunctioned 49 Optical Spectroscopic 49 Neptune Uranus Jupiter 49 Ultraviolet Imaging Spectrograph UVIS 49 Heliophysics Division 49 Mojzsis 49 magnetotail 49 VHE gamma rays 49 Comet Tempel 1 49 O OREOS 49 Submillimeter Array 49 Opportunity parachuted 49 Wolf Rayet stars 49 phyllosilicate 49 frigid arctic plains 49 laser altimeter 49 Extrasolar Planet 49 galactic disk 49 Bonnie Buratti 49 Ray Spectrometer 49 Cassini ultraviolet 49 neutron spectrometer 49 twin STEREO spacecraft 49 microlensing events 49 Kuiper belt object 49 APEX telescope 49 Foton M3 49 radar altimetry 49 diffuse aurora 49 Gerard Kuiper 49 Hellas Basin 49 elliptical galaxy 49 Microlensing 49 proto galaxies 49 Macroscale Interactions during 49 tau neutrinos 49 Jupiter magnetosphere 49 BepiColombo 49 Closest Approach 49 Comet Churyumov Gerasimenko 49 supergiant star 49 EPOCh 49 wavelength infrared 49 infrared observatory 49 planetary scientist 49 millimeter wavelength 49 Foton M2 49 scientist Carolyn Porco 49 TrES 49 comets moons 49 constellation Taurus 49 Shuttle Discovery docks 49 airborne particles affect 49 Mars Squyres 49 optical telescopes 49 Foton spacecraft 49 Launch Scrubbed 49 distant galaxies 49 Jenniskens 49 Sedna 49 blazar 49 Huygens mission 49 planets 49 greatest insect emergences 49 NFIRE satellite 49 NCAR sponsor 49 Observatory SDO 49 northern arctic plains 49 Solar Terrestrial Relations 49 Pierre Simon Laplace 49 supervolcanoes 49 Apollo missions 49 Larry Soderblom 49 IRAS #-# 49 Europa Ganymede 48 meter Keck telescopes 48 Aquarius adore 48 hydroxyl molecules 48 largest moon Charon 48 redshifts 48 Pluto Uranus 48 ESA Rosetta 48 Bok globules 48 AGNs 48 N. Rathnasree 48 celestial object 48 Monoceros 48 constellation Pegasus 48 cosmic ray collisions 48 telescope Uranus 48 Space Station Status 48 Comet Elenin 48 HIRES spectrometer 48 HiRISE camera 48 Keck telescopes 48 astronomer Johannes Kepler 48 scarps indicating 48 Mars rovers Spirit 48 Terra Meridiani 48 spacecraft orbiting 48 Quadrantids 48 stellar seismology 48 interstellar dust grains 48 orbiting 48 extrasolar planet HD #b 48 planetary magnetospheres 48 Dan Buhl Planetarium 48 Perseus constellation 48 PSR B# +# 48 thermal infrared 48 STEREO mission 48 Astronomers Find 48 Halton Arp 48 waitress Ingrid Sufan 48 HARPS spectrograph attached 48 zodiacal constellations 48 Pisces adore 48 coronal mass ejections CMEs 48 Caloris Basin 48 Mars Pathfinder 48 cosmic ray astronomy