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(Click for frequent words.) 76 WM Keck Observatory 74 Keck Telescope 72 Subaru Telescope 72 Keck telescope 71 Keck telescopes 71 Submillimeter Array 70 Subaru telescope 68 Gemini Observatory 68 atop Mauna Kea 68 NASA Infrared Telescope 67 Mauna Kea Hawaii 66 Lick Observatory 65 meter Keck telescopes 65 inch Samuel Oschin 64 telescopes atop Mauna 64 Mauna Loa Observatory 63 Keck Telescopes 63 ESO VLT 63 telescope atop Mauna 63 CFHT 62 ESO Paranal Observatory 62 Faulkes Telescope 62 Gemini telescopes 62 IfA 62 Adaptive Optics 62 infrared telescope 62 Steward Observatory 62 Infrared Telescope Facility 61 Keck Interferometer 61 Harald Ebeling 61 Pan STARRS PS1 telescope 61 MMT Observatory 61 Samuel Oschin Telescope 60 ESA XMM Newton 60 Laser Interferometer Gravitational Wave 60 Very Large Telescope 60 UKIRT 60 telescopes 60 ESO Very Large Telescope 60 infrared astronomy 60 Mauna Loa volcano 60 GALEX 60 Pan STARRS 60 Solar Observatory 60 Submillimeter Array SMA 59 XMM Newton 59 optical telescopes 59 X ray telescopes 59 HARPS instrument 59 Gemini Telescope 59 Near Infrared Camera 59 Carnegie Observatories 59 NOAO 59 Astrophysical Research 59 Planetology 59 RHESSI 59 telescope 59 infrared telescopes 59 planetary astronomer 59 Paranal 59 SOAR telescope 59 Palomar Observatory 58 optical telescope 58 ray Space Telescope 58 DEEP2 58 WIYN 58 Infrared Telescope UKIRT 58 Thirty Meter Telescope 58 gamma ray observatory 58 Hawaii Mauna Kea 58 NASA Chandra 58 spectroscopic observations 58 La Silla Observatory 58 Rychard Bouwens 58 observatories 58 astrometry 58 NASA Far Ultraviolet 58 Kitt Peak 58 Robert Jedicke 58 Hubble observations 58 NASA Wilkinson Microwave 58 Planetary Science Institute 58 X ray observatory 58 Japan NAOJ 58 THEMIS satellites 58 meter Keck telescope 57 Solar TErrestrial RElations Observatory 57 Luann Becker 57 Andrea Ghez 57 National Astronomical Observatory 57 SeaWiFS 57 Telescope LSST 57 Franck Marchis 57 Wilkinson Microwave Anisotropy Probe 57 LROC 57 High Angular Resolution 57 Thermal Emission Spectrometer 57 astronomers 57 VIRTIS 57 DISR 57 Chilean Atacama Desert 57 Michael Studinger 57 STScI 57 Astrophysics Cambridge Mass. 56 infrared observatory 56 microlensing 56 UCO Lick 56 KIPAC 56 MIT Haystack Observatory 56 Muchachos Observatory 56 located atop Mauna 56 Imiloa 56 Landsat satellite 56 Observatories 56 Herschel Space 56 RXTE 56 WMAP satellite 56 Anisotropy Probe 56 Spacewatch 56 Crab Pulsar 56 SDSS II 56 planetary scientist 56 Great Observatories 56 High Altitude Observatory 56 imaging spectrometer 56 Optical Gravitational Lensing Experiment 56 ESA Integral 56 gamma ray spectrometer 56 APXS 56 CfA 56 observatory 56 Mauna Kea 56 Observatory STEREO 56 NASA Fermi Gamma 56 Infrared Array Camera 55 IceCube 55 infrared interferometry 55 Suzaku X ray 55 gravitational microlensing 55 Fermi telescope 55 submillimetre 55 MBARI 55 La Silla observatory 55 infrared mapping spectrometer 55 Very Large Array 55 AERONET 55 Anisotropy Probe WMAP 55 Hubble Near Infrared 55 X ray observatories 55 radial velocity technique 55 NASA MODIS 55 Climate Experiment GRACE 55 twin Keck telescopes 55 ESA Planck 55 orbiting Chandra 55 Planetary Transits 55 Siding Spring 55 Tropical Rainfall Measuring 55 ESO telescope 55 NASA Interstellar Boundary 55 Array ALMA 55 orbiting gamma ray 55 Lunar Reconnaissance Orbiter Camera 55 Paranal Observatory 55 CIRES 55 radar altimetry 55 Arecibo Observatory 55 Upsilon Andromedae 55 astronomical observatory 55 exoplanetary 55 NASA THEMIS 55 Relations Observatory STEREO 55 Convection Rotation 55 Mars CRISM 55 NAOJ 55 Infrared Telescope 55 Cerro Pachón 55 SSRL 55 CALIPSO 55 planetary Transits 55 Helioseismic 55 gravitational lensing 55 HARPS spectrograph attached 55 UA Steward Observatory 55 NASA Jet Propulsion Lab 55 ESO astronomer 54 radial velocity 54 Spectrograph 54 Mössbauer 54 Cerro Tololo 54 KamLAND 54 Vassilis Angelopoulos 54 polarimetry 54 Nasa Kepler 54 Fermi LAT 54 Multi Object Spectrometer 54 adaptive optics 54 Herschel telescope 54 Image NASA JPL 54 DEIMOS 54 Astrophysics MOA 54 Evolution Explorer 54 Roque de los 54 Southern Observatory ESO 54 Area Telescope LAT 54 optical infrared telescope 54 LSST 54 CoRoT satellite 54 Multi Object Spectrograph 54 HIRES spectrometer 54 Observatory telescope 54 MINOS 54 Infrared Pathfinder Satellite 54 Hinode 54 Descent Imager Spectral Radiometer 54 Caltech Palomar Observatory 54 cosmic ray observatory 54 LIGO 54 Thermal Emission Imaging 54 Nikku Madhusudhan 54 HUDF 54 spectroscopic measurements 54 EarthScope 54 Telescope BAT 54 Observatory Very 54 Telescope 54 Solar Optical Telescope 54 IODP 54 HiRISE camera 54 Interferometer VLTI 54 telescopic observations 54 Manchester Jodrell Bank 54 Space Physics 54 Observatory LIGO 54 Tommaso Treu 54 Science Experiment HiRISE 54 Aqua satellite 54 earthshine 54 Planck satellite 54 ATST 54 National Optical Astronomy 54 Whipple Observatory 54 radiotelescope 54 Observatory SDO 54 Diviner instrument 54 Cerro Armazones 54 seismometers 53 Solar Dynamics Observatory 53 Gravitational lensing 53 fainter objects 53 Cerro Paranal 53 X ray Observatory 53 astronomical telescope 53 Mount Stromlo Observatory 53 Kepler Mission 53 particle detector 53 Hobby Eberly Telescope 53 Compact Reconnaissance Imaging Spectrometer 53 inch refractor telescope 53 Fermi Gamma ray 53 Wilkinson Microwave Probe 53 infrared spectrograph 53 Spitzer Space Telescope 53 observatory telescope 53 COROT 53 SkyCenter 53 Lowell Observatory 53 hexagonal mirrors 53 USArray 53 GJ #b [002] 53 MicroFUN 53 Interior Laboratory GRAIL 53 Orbiter MRO 53 astrophysical phenomena 53 Observatory LDEO 53 distant supernovae 53 WISE telescope 53 Astrophysical Institute 53 Virtual Planetary Laboratory 53 SECCHI 53 HD#b 53 Stan Woosley 53 Moderate Resolution Imaging 53 Rolf Kudritzki 53 Mini Thermal Emission 53 Reflection Radiometer ASTER 53 Storrie Lombardi 53 Jupiter moon Io 53 Cosmic Background Explorer 53 NASA Cassini spacecraft 53 Magnetic Imager HMI 53 orbiting telescope 53 laser altimeter 53 Cancri e 53 geochemists 53 ESA SMART 53 NASA Mars Odyssey 53 Composite Infrared Spectrometer 53 Erik Asphaug 53 Katzman Automatic 53 distant quasar 53 Jay Melosh 53 THEMIS 53 Alex Filippenko 53 Las Campanas Observatory 53 ESA Envisat satellite 53 NASA STEREO 53 Gregory Asner 53 TSN PZ camera 53 Cloud Aerosol Lidar 53 ESO La Silla 53 weak gravitational lensing 53 gaseous planet 53 Astrophysical 53 spectroscopic 53 CRISM 53 spectrographs 53 William Herschel Telescope 52 Scripps Oceanography 52 Hawaiian Volcano Observatory 52 NASA Cassini 52 exoplanet hunter 52 SINFONI 52 Optical Telescope 52 WISE infrared 52 detect gravitational waves 52 Cassini imaging 52 Richard Mushotzky 52 interferometer 52 LOFAR 52 Galaxy Evolution 52 Fomalhaut b 52 Galileo spacecraft 52 Extraterrestrial Intelligence Institute 52 X ray spectrometer 52 InSAR 52 Cassini flyby 52 UNAVCO 52 Credit NASA JPL 52 MODIS 52 SNfactory 52 David Awschalom 52 Moffet Field 52 Cassini Huygens 52 Peter Jenniskens 52 Context Camera 52 NASA Cosmic Background 52 Astrobiology Institute 52 Volcano Observatory 52 astronomical observations 52 Submillimeter 52 Reflection Radiometer 52 XMM Newton satellite 52 ESA Envisat 52 Mission TRMM satellite 52 HiRISE 52 Earth Asteroid 52 spectrographic 52 astronomer 52 Mauna Kea volcano 52 satellite altimetry 52 Super Kamiokande 52 Arecibo radio 52 Hubble Space Telescope HST 52 Astrophysics 52 Nasa Ames 52 Paranal Chile 52 neutrino detector 52 Digitized Sky Survey 52 Lamont Doherty 52 Orbiter LRO 52 WIYN Observatory 52 AKARI 52 Collider Detector 52 WFC3 52 gravitational lenses 52 neutron spectrometer 52 MG J# +# 52 Solar Terrestrial Relations 52 Thiemens 52 Astronomical Observatory 52 eyepiece #/#s f/#.# 52 Roland Burgmann 52 Extraterrestrial Physics 52 Explorer WISE 52 Jeffrey Kargel 52 SDSS III 52 HARPS spectrograph 52 Earthscope 52 FORCAST 52 HESS telescopes 52 Cassini ultraviolet 52 Pierre Auger Observatory 52 Advanced Microwave Scanning 52 Telescope Array 52 RS Ophiuchi 52 Haleakala volcano 52 ESO telescopes 52 AU Mic 52 Large Binocular Telescope LBT 52 Lyot 52 JILA 52 Cepheid variables 52 radio occultation 52 CHARA 52 Space Telescope 52 La Silla Chile 51 Ulysses spacecraft 51 NASA Astrobiology Institute 51 BLG #Lb 51 Total Ozone Mapping 51 Velocity Planet Searcher 51 Uninhabited Aerial Vehicle 51 Planetary scientist 51 occultations 51 Commissariat à l' Énergie 51 Cerro Pachon 51 Krimigis 51 Hobby Eberly 51 Shri Kulkarni 51 photometer 51 polarimetric 51 Corot 7b 51 MPIfR 51 faint galaxies 51 Adam Riess 51 Nasa spacecraft 51 Extragalactic 51 Astrophysics Laboratory 51 Kilo Moana 51 NEOWISE 51 interferometers 51 NASA Goddard 51 CU Boulder LASP 51 UAVSAR 51 Planetary Fourier Spectrometer PFS 51 Jet Propulsion Laboratory JPL 51 CloudSat 51 High Accuracy Radial 51 COBE satellite 51 Seismological Laboratory 51 Jean Luc Margot 51 Arecibo radar 51 Heterodyne Instrument 51 NASA Goddard Spaceflight 51 orbiting Hubble Space Telescope 51 SPICAM 51 Institut d' Astrophysique de 51 Mission SRTM 51 Spaceweather.com 51 ChemCam 51 EPOCh 51 APEX telescope 51 Las Cumbres Observatory 51 NuSTAR 51 Lunar Reconnaissance Orbiter LRO 51 gravitational wave 51 discover Fomalhaut 51 noctilucent clouds 51 Jonathan Lunine 51 UVOT 51 Explorer IBEX 51 NASA Aqua 51 Field Imager 51 Smithsonian Astrophysical Observatory 51 Hubble astronomer 51 Spitzer infrared spectrograph 51 particle detectors 51 NASA ICESat 51 UA Lunar 51 Observatory astronomer 51 astronomical observatories 51 interferometric 51 ROSAT 51 undersea volcanoes 51 Gamburtsev 51 Interferometer 51 Bug Nebula 51 extrasolar planetary systems 51 Heliospheric Investigation 51 VISTA telescope 51 USGS Cascades Volcano 51 seismographs 51 Pancam 51 ion microprobe 51 Meteorite Studies 51 Ellen Stofan 51 CU Boulder Laboratory 51 Upsilon Andromedae b 51 infrared imager 51 planetary astronomy 51 Earth Connection Coronal 51 DZero 51 Rosetta orbiter 51 solar corona 51 optical interferometry 51 Conductivity Analyzer 51 Extreme Ultraviolet Imaging Spectrometer 51 Mars Color Imager 51 radiometer 51 filamentary structure 51 distant quasars 50 aperture telescope 50 Ring Nebula 50 http:/saturn.jpl.nasa.gov 50 ASTRON 50 geomagnetism 50 Observatoire de Paris 50 NICMOS 50 Nankai Trough 50 Microscopy Electrochemistry 50 multiband imaging photometer 50 Large Binocular Telescope 50 Earth orbiting satellites 50 coronagraph 50 Shuttle Radar Topography 50 RRATs 50 moon Io 50 Grillmair 50 Spectroradiometer 50 Lunar Orbiter Laser Altimeter 50 Cygnus Lyra region 50 seismometer 50 astrometric 50 SEGUE 50 Space Telescopes 50 OSIRIS 50 Pieter van Dokkum 50 Long Term Ecological 50 astrophysicists 50 Infrared Thermal Imaging Spectrometer 50 NASA WMAP 50 Climate Experiment 50 Jet Propulsion Lab 50 transiting exoplanets 50 orbiting observatories 50 exoplanets orbiting 50 GOSAT 50 Accelerator Mass Spectrometry 50 Delta Cephei 50 NASA Lunar Crater 50 Wide Angle Search 50 microlensing events 50 Dan Buhl Planetarium 50 scanning electron microscope 50 Microlensing Observations 50 ESA ERS 50 NRAO 50 DIXI 50 Mars Climate Sounder 50 Imaging Spectroradiometer MODIS 50 Ocean Observing 50 extrasolar planets orbiting 50 Nikon D# Kowa 50 Spitzer Space Telescopes 50 particle analyzers 50 Berkeley Geochronology Center 50 Haumea 50 USGS Hawaiian Volcano 50 Earthlike planets 50 Sasselov 50 PSR B# +# 50 SOHO spacecraft 50 LCROSS mission 50 NASA ESA Hubble 50 Observatory NOAO 50 Hubble Space Telescopes 50 Extrasolar Planet Search 50 Cassini magnetometer 50 PASADENA Calif. Astronomers 50 Nasa Jet Propulsion 50 ENVISAT 50 scanning tunneling microscope 50 visit http:/saturn.jpl.nasa.gov 50 Mossbauer spectrometer 50 Stanford Synchrotron Radiation Lightsource 50 Olympus Mons 50 Resolution Imaging 50 ultraviolet spectrograph 50 Carey Lisse 50 Radioastronomy 50 ultraviolet spectrometer 50 CReSIS 50 ESA Cluster 50 Astronomy 50 exo planets 50 asteroid Eros 50 Imaging Spectroradiometer MODIS instrument 50 X ray telescope 50 Astrophysics CfA 50 submillimeter wavelength 50 cryo electron microscope 50 sized planets orbiting 50 Imaging Spectrometer 50 Slooh 50 ultraviolet imaging spectrograph 50 Comet Hartley 50 X ray Telescope XRT 50 called gravitational microlensing 50 NASA JPL Caltech 50 gamma ray telescope 50 Maria Zuber 50 Fermi Large 50 Kavli Institute 50 Heliospheric Observatory SOHO 50 Aberdeen Oceanlab 50 Cassini radar 50 Infrared Mapping Spectrometer 50 particle astrophysics 50 polarimeter 50 Rosetta spacecraft 50 neutrino detectors 50 VLBA 50 Peter Kudritzki 50 seismological laboratory 50 supercomputer simulations 50 extrasolar 50 STEREO spacecraft 49 Nasa Goddard Space 49 MPG ESO 49 IBEX spacecraft 49 foreground galaxy 49 EVLA 49 Envisat satellites 49 millimeter wavelengths 49 Synthesis NCEAS 49 radial velocity measurements 49 D CIXS 49 Wolfgang Brandner 49 Mini SAR 49 Ellery Hale 49 Gravity Recovery 49 GLAST Burst Monitor 49 planets Uranus 49 SIRTF 49 Wolszczan 49 extragalactic 49 extrasolar planets 49 Astrophysicist 49 Gamma ray burst 49 ATLAS experiment 49 Omega Centauri 49 Eric Becklin 49 Burst Alert 49 submillimeter wavelengths 49 Chandra X ray 49 Triangulum Galaxy 49 inch refracting telescope 49 HiRISE camera aboard 49 SPIRE instrument 49 Coma Cluster 49 cosmic cannibal 49 rover panoramic 49 planetary geologist 49 XMM Newton X ray 49 lunar topography 49 NOAO AURA NSF 49 Envisat satellite 49 spectroscope 49 DRAO 49 bathymetry 49 credit NASA JPL 49 Hinode satellite 49 Tarduno 49 Comet Holmes 49 amateur astronomers peering 49 NASA Ames 49 AMSR E 49 COROT 7b 49 robotic telescopes 49 High Resolution Imaging 49 Caltech astronomer 49 Explorer GALEX 49 http:/www.nasa.gov/cassini 49 Pan STARRS telescope 49 periodic dimming 49 Observatory 49 planetary science 49 stellar occultations 49 cosmological distances 49 radiometers 49 Lyman alpha 49 Synthetic Aperture Radar 49 Planetary Physics 49 ESA Herschel 49 Moessbauer spectrometer 49 Dalcanton 49 Planck spacecraft 49 Cristina Chiappini 49 Joel Primack 49 GJ#b 49 Observatory La Silla 49 exoplanets planets 49 astrophysical objects 49 Panoramic Survey 49 photometry 49 NIRCam 49 NASA QuikScat satellite 49 Sara Seager 49 NASA Kepler 49 constellation Carina 49 stellar occultation 49 LORRI 49 Mars Reconnaissance Orbiter 49 moons circling 49 extinct volcanoes 49 galactic cosmic rays 49 PlanetQuest 49 Frank Bertoldi 49 Cosmic Microwave Background 49 THEMIS mission 49 spiral nebulae 49 satellite altimeters 49 detecting gravitational waves 49 elliptical galaxy NGC 49 interferograms 49 UC Observatories Lick 49 Atacama Large Millimeter submillimeter 49 Atacama Large Millimeter Array 49 Deep Field HUDF 49 Cosmic Evolution 49 microshutters 49 intrinsic brightness 49 XMM Newton observations 49 Synchrotron Radiation 49 RAS Observatory 49 exo planet 49 Syrtis Major 49 Scripps Institution 49 fissure eruption 49 William Bottke 49 Robotic Arm Camera 49 Astronomical Society AAS 49 Faint Object 49 P/# A2 49 Planetary Laboratory 49 Large Telescope 49 Kawaler 49 cosmic microwave radiation 49 Hawaii Telescope CFHT 49 JWST 49 VIRTIS instrument 49 refracting telescope 49 infrared spectrometers 49 System THEMIS 49 spiral galaxy NGC 49 STEREO mission 49 ESA Rosetta 49 Advanced Spaceborne Thermal Emission 49 TrES 4 49 Otto Bliesner 49 Hubble 49 Palmyra Atoll 49 velocity Planet Searcher 49 Cassegrain telescope 49 Kuiper belt objects 49 Hubble Space Telescope 49 VLTI 49 SDSS telescope 49 telescopes astronomers 49 Pluto Charon 49 Valles Marineris 49 Son Nghiem 49 CoRoT 9b 49 astrophysical 49 Geophysical Fluid Dynamics 49 microscopic imager 49 orbiting Saturn 49 NASA Atmospheric Infrared 49 Instrument OMI 49 Cassini Huygens spacecraft 48 Stanford Synchrotron Radiation 48 Martin Tomasko 48 orbiting telescopes 48 infrared spectrometer 48 rocky extrasolar planet 48 Francis Halzen 48 Using ESO Very 48 Tropical Storm Neki 48 Diviner 48 microwave radiometer 48 Kitt Peak National 48 Gravity Probe B 48 J# +# [002] 48 Arizona Steward Observatory 48 DEPTHX 48 composite infrared spectrometer 48 Galilean satellites 48 European Synchrotron Radiation 48 Voyager spacecraft 48 Viking landers 48 HUDF# 48 Kristin Laidre 48 spacecraft Cassini 48 Comet Halley 48 UAF Geophysical Institute 48 Saul Perlmutter 48 Giovanni Cassini 48 Mars Orbiter Camera 48 Credits ESA 48 NASA Great Observatories 48 Cerro Tololo Inter 48 Harvard Smithsonian Astrophysical 48 WMAP 48 Richard Binzel 48 outer corona 48 constellation Pisces 48 HiRISE images 48 Laboratory SSRL 48 electron diffraction 48 Maciej Konacki 48 astrophotographer 48 submillimetre wavelengths 48 HARPS 48 Chajnantor 48 inch refractor 48 GROND 48 Opportunity rover 48 Moon Mineralogy Mapper M3 48 Doppler velocity 48 distant galaxies 48 twin STEREO spacecraft 48 infrared wavelengths 48 Infrared Astronomy 48 Telescopes 48 neutrino telescope 48 Harlow Shapley 48 optical wavelengths 48 Epsilon Aurigae 48 Beta Pictoris b 48 cosmic ray 48 NanoSIMS 48 Saturn Enceladus 48 Smithsonian astronomer 48 Boethin 48 Saturnian system 48 Milky Way Galaxy 48 NASAs 48 Kepler spacecraft 48 BioServe Space Technologies 48 distant galaxy 48 TerraSAR X 48 planets orbiting sun 48 Gravity Probe 48 Vexcel 48 TRMM 48 Neutron Spectrometer 48 altimetry 48 Plate Boundary 48 Spectroscopic Explorer 48 Jennifer Heldmann 48 Comet Lulin 48 HRSC 48 Arecibo telescope 48 Very Energetic Radiation 48 numerical simulations 48 Perseus Cluster 48 Sidewalk Astronomers 48 Greg Delory 48 lunar crust 48 MARSIS 48 Chodas 48 SuperWASP 48 Advanced Photon Source 48 Nankai Trough Zone 48 laser altimetry 48 Alaska Fairbanks Geophysical 48 Chajnantor plateau 48 UVES 48 JPL manages 48 retroreflector 48 EPOXI mission 48 microscopy technique 48 interferometric synthetic aperture radar 48 theoretical astrophysics 48 absorbs photons 48 Meteoritics 48 Garching Germany 48 cosmological observations 48 Cassini 48 Jet Propulsion Laboratory 48 Exoplanet 48 intracluster 48 Deep Impact Principal Investigator 48 HPWREN 48 NASA Lunar Reconnaissance 48 VIMOS 48 Hipparcos 48 Kuiper Belt Objects 48 Gerta Keller 48 jovian 48 Cryospheric Sciences Branch 48 neutrino oscillation 48 astronomy observatory 48 celestial object 48 WISE spacecraft 48 Space Infrared Telescope 48 Boston Micromachines 48 active galactic nuclei 48 KAGUYA 48 Syun Ichi Akasofu 48 penetrating radar 48 HiRISE image 48 NASA MESSENGER spacecraft 48 Amateur Astronomers 48 ESA ASI 48 Peter Capak 48 Stephan Quintet 48 Hubble Space 48 SAFOD 48 Giacconi 48 Thermal Emission 48 Uwe Bergmann 48 Astrophysicists 48 MODIS instrument 48 lunar equator 48 GOCE 48 inhabitable planets 48 VLBI 48 Landsat satellites 48 Infrared Astronomical Satellite IRAS 48 Virgo Cluster 48 NASA Mars Reconnaissance 48 Epsilon Eridani 48 Volatile Evolution 48 MARSIS radar 48 Cosmic Origins Spectrograph 48 gamma ray observatories 48 Adaptive optics 48 Cepheids 48 X ray wavelengths 48 Amateur astronomers 48 Astronomers 48 Cerro Paranal Chile 48 JPL Pasadena 48 Gerard Kuiper 48 neutrino experiment 48 Applied Physics Lab 48 OGLE TR #b 48 accelerographs 48 VB #b 48 Nasa Mars Reconnaissance 48 spectroscopically 48 Electron Microscope 48 Comet Hartley 2 48 Interferometric Synthetic Aperture Radar 48 AAVSO 48 Chicxulub impact 48 TRMM satellite 48 Hobby Eberly telescope 48 Vertebrate Zoology 48 Igor Chekalin 47 interferometry 47 scanning tunneling microscope STM 47 Dikpati 47 radar interferometry 47 SIM PlanetQuest 47 cometary nucleus 47 Mercury flyby 47 TanDEM X 47 retrograde orbit 47 transmission electron microscope 47 NASA Orbiting Carbon 47 Polarimetry 47 OMEGA instrument 47 Harvard Smithsonian 47 Comet #P 47 Applied Physics Laboratory 47 CIRS 47 hyperspectral 47 Spectrometer 47 Arsia Mons 47 École Polytechnique Fédérale de 47 YORP effect 47 Dumbbell Nebula 47 WIYN telescope 47 Moon Mineralogy Mapper 47 Kepler #b 47 NOAA GOES 47 Moderate Resolution 47 Unit Telescopes 47 moons orbiting Saturn 47 X ray Timing 47 Lunar Prospector 47 Pascale Ehrenfreund 47 Deep Impact eXtended Investigation 47 Hinode spacecraft 47 paleobiologist 47 Magellan telescopes 47 NASA Voyager spacecraft 47 Large Synoptic Survey 47 multibeam 47 gradiometer 47 SPring 8 47 De Pontieu 47 La Silla 47 de Pater 47 N. Rathnasree 47 interstellar cloud