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(Click for frequent words.) 80 MIT planetary scientist 63 Maria Zuber 63 Sasselov 62 Richard Binzel 60 planetary astronomy 59 planetary astronomer 59 planetary scientist 59 Owen Gingerich 59 Shri Kulkarni 58 astronomer 58 Gliese #g 58 Andrea Ghez 58 Mary Voytek 58 Grillmair 58 extrasolar 57 Max Tegmark 57 Tegmark 57 Avishay Gal Yam 57 nicknamed Xena 57 habitable planets 57 Corot 7b 57 TrES 4 57 Jonathan Lunine 57 Ray Villard 57 Wolszczan 57 Astrophysics Cambridge Mass. 57 Werthimer 56 Earthlike planet 56 Dan Werthimer 56 Jeffrey Kargel 56 Christopher Chyba 56 Mojzsis 56 Pieter van Dokkum 56 Filippenko 56 Adam Riess 56 Peter Jenniskens 56 Extraterrestrial Intelligence Institute 56 Ellen Stofan 56 Ray Jayawardhana 56 Charles Beichman 56 Galilean satellites 56 moons circling 56 Spudis 55 Kuiper belt objects 55 Franck Marchis 55 Lunine 55 Gliese #c 55 Inez Fung 55 Fomalhaut b 55 Geza Gyuk 55 Cosmic Microwave Background 55 planetary Transits 55 Nikku Madhusudhan 55 NASA Far Ultraviolet 55 Nima Arkani Hamed 55 Konacki 55 Upsilon Andromedae b 55 Ed Weiler 55 Earthlike planets 55 Robert Jedicke 54 theoretical astrophysicist 54 Vikhlinin 54 Bohdan Paczynski 54 Mewaldt 54 Bruce Jakosky 54 Gravitational lensing 54 Beichman 54 Mario Livio 54 Storrie Lombardi 54 Jill Tarter 54 Drake Deming 54 Margarita Marinova 54 Wolfgang Ketterle 54 Carolyn Porco 54 supersymmetric particles 54 Sromovsky 54 Geoffrey Marcy 54 Verbiscer 54 Jenniskens 54 Kashlinsky 54 planets orbiting distant 54 retrograde orbit 54 extrasolar planet 54 planetary geologist 54 RRATs 54 Natalie Batalha 54 distant supernovae 54 Bonnie Buratti 54 Rayleigh scattering 54 Astrophysicist 54 Anthony Remijan 54 Lawrence Krauss 54 Seth Shostak 54 Richard Mushotzky 54 Smithsonian astronomer 53 habitable worlds 53 Alex Filippenko 53 exoplanetary 53 Dimitar Sasselov 53 Fran Bagenal 53 submillimeter wavelengths 53 Henize #-# 53 astronomer Seth Shostak 53 Pascale Ehrenfreund 53 GJ #b [002] 53 OGLE TR #b 53 Gregory Asner 53 Mamajek 53 Fermi telescope 53 journal Icarus 53 Terrestrial Magnetism 53 Cancri e 53 Ferenc Krausz 53 Bruce Margon 53 cosmic microwave radiation 53 Krimigis 53 Tommaso Treu 53 astrobiological 53 millisecond pulsar 53 Joel Primack 53 Earthlike 53 Raymond Jeanloz 53 Jim Kasting 53 GLAST telescope 53 extrasolar planets 53 inch Samuel Oschin 53 extrasolar planets orbiting 53 CfA 53 Geoffrey Forden 53 axion 52 X ray wavelengths 52 Kepler #b 52 Caltech astronomer 52 inhabitable planets 52 Brenda Ekwurzel climate 52 Kuiper Belt Objects 52 Jedicke 52 NASA WMAP 52 Giovanni Fazio 52 Peyghambarian 52 Sushil Atreya 52 WASP #b 52 Goldilocks planet 52 Hany Farid 52 Jane Ferrigno 52 Phil Plait 52 Cryospheric Sciences Branch 52 Avi Loeb 52 GJ#b 52 Ketterle 52 Richard Lindzen professor 52 GJ #b [001] 52 extrasolar planetary systems 52 gravitational microlensing 52 Kuchner 52 Abdalati 52 Nasa Kepler 52 Abdussamatov 52 Cassini imaging 52 Gamma ray burst 52 cosmological distances 52 planetary nebulas 52 icy moons 52 Rignot 52 Makiko Sato 52 Reinhard Genzel 52 Kepler Mission 52 Kaltenegger 52 astronomers 52 Gerard Kuiper 52 Image NASA JPL 52 S. Lindzen 52 COROT 7b 52 William Happer 52 Xavier Bonfils 52 Apophis asteroid 52 Alaska Fairbanks Geophysical 52 Bill Chameides 52 William Borucki 52 Mate Adamkovics 52 Dean Pesnell 52 Gondolo 52 Carey Lisse 52 HD#b 52 Mandushev 52 CMB radiation 52 Kounaves 52 WIMPs 52 NASA Jet Propulsion Lab 52 LOFAR 52 Steward Observatory 52 astrobiology scientist 52 Astrophysical 51 rocky planets 51 MINOS 51 planet Gliese #g 51 astrophysicist 51 meteoroid 51 Cosmologists 51 Don Gurnett 51 Keck telescope 51 sterile neutrino 51 Corot 9b 51 Foing 51 Dikpati 51 Lars Hernquist 51 Dariusz Leszczynski 51 astrophysical 51 Haystack Observatory 51 exoplanet orbiting 51 Red Rectangle 51 Higgs bosons 51 Wick Haxton 51 solar corona 51 Maciej Konacki 51 astrobiologists 51 MIT Haystack Observatory 51 de Pater 51 rocky extrasolar planet 51 ESA Herschel 51 Cygnus Lyra region 51 Geminga 51 Guhathakurta 51 moons Phobos 51 Vakoch 51 noctilucent clouds 51 Pluto Eris 51 Michio Kaku 51 gaseous planet 51 Astronomical Society AAS 51 astrophysical sciences 51 interstellar cloud 51 Giovanni Cassini 51 theoretical astrophysics 51 exoplanets orbiting 51 Robock 51 Bruce Wielicki 51 BLG #Lb 51 Saul Perlmutter 51 director Charles Elachi 51 Elenin 51 Tarduno 51 Hod Lipson 51 exo planet 51 Laura Grego 51 habitable zones 51 Rolf Kudritzki 51 Martin Tomasko 51 Uranus Neptune 51 Roukes 51 Drew Shindell 51 planemos 51 Gliese #d 51 Nasa Goddard Space 51 Libra constellation Vogt 51 Eric Rignot 51 faint galaxies 51 NASA astrobiology 51 Emily Lakdawalla 51 Epsilon Eridani 51 Neil DeGrasse Tyson 51 KIPAC 51 PSR B# +# 51 A'Hearn 51 Bruce Banerdt 51 Gaensler 51 Winglee 51 moons orbiting Saturn 51 retrograde orbits 51 Astrophysicists 51 Jack Lissauer 51 Wilkinson Microwave Anisotropy Probe 51 extrasolar worlds 51 CoRoT 9b 51 Hubble astronomer 51 Gerta Keller 51 spiral nebulae 51 planets Uranus 50 Jupiter moon Io 50 Mercury magnetosphere 50 Paul Spudis 50 Deep Impact Principal Investigator 50 Neil Gehrels 50 Charon Pluto 50 comets orbiting 50 Stan Woosley 50 Michael Zolensky 50 exoplanet 50 Stephane Udry 50 Higgs particle 50 Alycia Weinberger 50 Linda Spilker 50 Jonathan Lunine Cassini 50 cosmologist 50 Charles Elachi 50 Oort Cloud 50 Martin Haehnelt 50 GALEX 50 Solar Terrestrial Physics 50 SN#A 50 #gy 50 JILA joint 50 journal Meteoritics 50 Higgs boson particle 50 Hörst 50 detect gravitational waves 50 astrophysicists 50 Garching Germany 50 Phil DeCola 50 Evolution Explorer 50 Nilton Renno 50 Kepler 9c 50 Earths orbiting 50 cosmological observations 50 Jianjun Yin 50 Michal Lipson 50 Galilean moons 50 David Spergel 50 Planetary Laboratory 50 Frank Bertoldi 50 submillimeter wavelength 50 astronomical observations 50 Meteoritics 50 BP Psc 50 Otto Bliesner 50 Professor Richard Lindzen 50 Comet Holmes 50 novas 50 Christophe Lovis 50 X ray telescopes 50 Rudy Schild 50 spinning neutron stars 50 Wolfgang Brandner 50 planetary geology 50 Kuiper Belt object 50 Stephen Mojzsis 50 Mark Changizi 50 Jon Giorgini 50 optical telescopes 50 antineutrinos 50 Alberto Saal 50 axions 50 orbiting Chandra 50 HD #b [002] 50 Von Frese 50 smallest exoplanet 50 Credit NASA JPL 50 Waleed Abdalati 50 Magellanic Clouds 50 Voorwerp 50 Ignatius Rigor 50 renowned cosmologist 50 Karl Menten 50 Planetary Science Institute 50 SIRTF 50 Robin Canup 50 Spaceweather.com 50 Samuel Oschin Telescope 50 Gliese #G 50 Cassini scientist 50 Joe Veverka 50 Jay Zwally 50 type Ia supernovae 50 Peter Capak 50 Gerhard Schwehm 50 Hamish Pritchard 50 Hakan Svedhem 50 Cees Dekker 50 atmospheric chemist 50 Michael A'Hearn 50 Michael Studinger 50 Johannes Lehmann 50 Planetary Physics 50 Cenko 50 planet HD #b 50 potentially habitable planets 50 Crab Pulsar 50 SwRI Space 50 KamLAND 50 Stéphane Udry 50 potentially habitable 50 EPOCh 50 Wilkinson Microwave Probe 50 PASADENA Calif. Astronomers 50 galactic cosmic rays 50 Carnegie Institution 50 Zolensky 50 Behrenfeld 50 Charles Bailyn 50 sized planets orbiting 50 Erik Asphaug 50 earthshine 50 Schawinski 49 Dmitri Denisov 49 Planck satellite 49 magnetars 49 Vourlidas 49 quasars 49 Atmospheric Oceanic 49 Planetary Transits 49 electron neutrinos 49 Oleg Abramov 49 exoplanets 49 Lika Guhathakurta 49 Upsilon Andromedae 49 Richard Lindzen 49 Greg Delory 49 Mini TES 49 pulsating aurora 49 Nathan Kaib 49 Aurigid 49 STScI 49 astrobiologist 49 planets atmospheres 49 Richard Berendzen 49 William Bottke 49 Kristin Laidre 49 constellation Carina 49 surface plasmon polariton 49 Nergis Mavalvala 49 dustier stormier atmosphere 49 Harlow Shapley 49 coronal loops 49 Jakosky 49 Einar Kjartansson geophysicist 49 MG J# +# 49 Grammier 49 moon Enceladus 49 Fermi Gamma ray 49 Josefino Comiso 49 Muchachos Observatory 49 National Astronomical Observatory 49 neutralinos 49 highly elliptical orbits 49 particle physicist 49 Gravitational waves 49 Caltech physicist 49 Alexey Vikhlinin 49 Djorgovski 49 RHESSI 49 AB Aurigae 49 Nobel laureate physicist 49 Rossby waves 49 Maunder minimum 49 HD #b [001] 49 star Fomalhaut 49 Fritz Zwicky 49 PSR J# 49 Europa Ganymede 49 Mars Neptune Uranus 49 NOAO 49 planets circling 49 Dan Durda 49 P/# A2 49 Martian meteorites 49 theoretical physicist 49 Dava Newman 49 sextillion stars 49 Colaprete 49 Bindschadler 49 Jonathan Overpeck climate 49 comet McNaught 49 Astrophysical Institute 49 eclipsing binary 49 Henrik Svensmark 49 Brother Guy Consolmagno 49 Keck Observatory 49 John Grotzinger 49 Kusenko 49 Frederic Pont 49 occultations 49 Lubchenko 49 Serreze 49 Rychard Bouwens 49 cosmic microwave background 49 Dante Lauretta 49 Pan STARRS 49 Niels Bohr Institute 49 fainter objects 49 Binzel 49 StarDate 49 terrestrial planets 49 GRBs 49 SETI Search 49 Meg Urry 49 Saturn Enceladus 49 Zeebe 49 gamma ray observatory 49 Observatoire de Paris 49 SNR #-#.# 49 Glaciologist 49 KBOs 49 Kip Thorne 49 shorter wavelengths 49 National Astronomical Observatories 49 Cassini ultraviolet 49 superheavy elements 49 Eric Steig 49 lunar perigee 49 Alicia Soderberg 49 magnetospheres 49 neutralino 49 infrared astronomy 49 interstellar dust 49 Horanyi 49 Lowell Observatory 49 planetary nebulae 49 Nasser Peyghambarian 49 Saturnian moon Titan 49 Baross 49 George Djorgovski 49 Harvard Smithsonian Astrophysical 49 Villy Christensen 49 Wysession 49 V# Mon 49 antiparticle 49 Comet Machholz 49 Linda Elkins Tanton 49 meteoroid impacts 49 von Frese 49 Bramley Murton 49 greatest insect emergences 49 comets asteroids 49 LCROSS scientist 49 Space Physics 49 van Arkel discovery 48 exoplanets planets 48 Svensmark 48 photosphere 48 Saturn aurora 48 magnetospheric imaging instrument 48 Pavel Kroupa 48 WHIM 48 Mini Thermal Emission 48 David Southwood ESA 48 filamentary structure 48 Kay Bidle 48 Neil deGrasse Tyson 48 EarthSky 48 Bottke 48 Carnegie Observatories 48 Ira Leifer 48 atmospheric scientist 48 Hans Laufer 48 MARSIS radar 48 Jean Luc Margot 48 Marin Soljacic 48 Pierre Simon Laplace 48 supermoon 48 celestial phenomena 48 Alexander Kashlinsky 48 Neils Bohr 48 Triangulum Galaxy 48 Geoff Marcy 48 Dalcanton 48 optical wavelengths 48 cosmological theories 48 PALCA 48 UA Lunar 48 microlensing events 48 Charles Elachi director 48 Alexander Goncharov 48 protoplanet 48 Bill Borucki Kepler 48 relativistic particles 48 brown dwarfs 48 eyepiece #/#s f/#.# 48 hypervelocity stars 48 planetary science 48 Jay Melosh 48 Hawking radiation 48 permanently shadowed craters 48 Julia Slingo 48 planetary transits 48 Steven Reppert 48 climate modeler 48 Neptune Uranus 48 Anne Verbiscer 48 Tranquada 48 Plait 48 Kazantzidis 48 asteroids comets 48 GRB #B 48 Laser Interferometer Gravitational Wave 48 Justin Halberda 48 ESA Planck 48 Comet Hartley 2 48 Priscu 48 Rainer Klement 48 Vassilis Angelopoulos 48 Laser Interferometer Space 48 Wallace Broecker 48 Roger Bilham 48 gravitational lenses 48 galaxy M# [001] 48 Klekociuk 48 Astronomer 48 SN #A 48 photometry 48 Boris Shustov 48 Ehud Shapiro 48 Shaviv 48 Ruvkun 48 Infrared Pathfinder Satellite 48 cometary dust 48 gravitational waves 48 Louise Prockter 48 SpaceWeather.com 48 Gamma ray bursts 48 atmospheric neutrinos 48 sunlike stars 48 Gehrels 48 Carl Wieman 48 Chris Rapley 48 absorbs photons 48 NASA Wilkinson Microwave 48 colliders 48 Venus Neptune Uranus 48 blazars 48 Luann Becker 48 Submillimeter Array 48 physicists 48 SN #gy 48 Arkani Hamed 48 assumed planets circling 48 Squyres Cornell 48 planets orbiting 48 multiband imaging photometer 48 Udry 48 V. Ramanathan 48 Percival Lowell 48 Jovian moon 48 Samuel Ting 48 Pasachoff 48 lensing galaxy 48 baryonic matter 48 gravitational wave 48 BP Piscium 48 Bug Nebula 48 Korotev 48 Tod Strohmayer 48 Garth Illingworth 48 Raymond Kurzweil 48 comets meteors 48 dimming starlight 48 subsurface ocean 48 geologist Jennifer Adleman 48 steering wheel tilts 48 Ring Nebula 48 Dave Reneke 48 ammonia hydrates 48 cometary material 48 extraterrestrial civilizations 48 cosmic ray flux 48 exo planets 48 Natalia Rybczynski 48 Solar Terrestrial Relations 48 Visit SPACE.com 48 Felisa Wolfe Simon 48 relativity theory 48 IntergalaticEarth 48 Very Large Array 48 Max Planck Institut fuer 48 magnetic monopoles 48 Nasa Jet Propulsion 48 Nousek 48 quantum astrophysicist 48 Prof. Hawking 48 Particle physics 48 Awschalom 48 Bernard Foing 48 Don Wuebbles 48 Director Charles Elachi 48 planet orbiting 48 Kuiper belt 48 Descent Imager Spectral Radiometer 48 moons orbiting 48 Microbiologist Cynan Ellis 48 Renu Malhotra 48 De Pontieu 48 Malcolm Fridlund 47 lunar crater 47 Govindasamy Bala 47 TSN PZ camera 47 Kevin Schawinski 47 intrinsic brightness 47 planets comets 47 Climate Experiment GRACE 47 sunlike star 47 Anisotropy Probe WMAP 47 Paul Chodas 47 asteroid collisions 47 interstellar dust particles 47 Epsilon Aurigae 47 Francis Halzen 47 Svedhem 47 Rich Zurek 47 circumstellar 47 SSRL 47 Kuiper Belt Object 47 UB# [003] 47 Banerdt 47 High Altitude Observatory 47 Astrophysical Journal 47 Krulwich 47 Magnetars 47 cosmologists 47 Thomas Jessell 47 scientist Carolyn Porco 47 Lamont Doherty 47 giant gaseous planets 47 Nasa Ames 47 spaceweather.com 47 Halton Arp 47 inner Oort Cloud 47 trans Neptunian objects 47 Larry Soderblom 47 CoRoT #b 47 planetary orbits 47 Katlenburg Lindau Germany 47 Astrophysics 47 active galactic nuclei 47 Kailash Sahu 47 martian meteorites 47 DZero 47 foreground galaxy 47 Keck Telescope 47 Donald Yeomans 47 Daniel Kleppner 47 Astrobiology Institute 47 COROT 47 Richard Prum 47 NASA Kepler 47 Exoplanet 47 HiRISE camera aboard 47 Theodor Hänsch 47 exobiology 47 Dan Buhl Planetarium 47 mu Arae 47 Alfred McEwen 47 Radioastronomy 47 Peter Vitousek 47 zodiacal dust 47 plutoids 47 Carle Pieters 47 Cosmic ray 47 Steven Cummer 47 CoRoT 7b 47 Son Nghiem 47 NASA THEMIS 47 coronal heating 47 cryovolcanism 47 spokeswoman Kylie Clem 47 Astrophysics CfA 47 Venusian atmosphere 47 Anthony Colaprete 47 graphite whiskers 47 Martians invading 47 visit http:/saturn.jpl.nasa.gov 47 transiting planets 47 Extraterrestrial Intelligence 47 planets circling stars 47 Eric Becklin 47 THEMIS satellites 47 submillimetre wavelengths 47 Galaxy Evolution 47 gravitationally bound 47 Giovanna Tinetti 47 transiting exoplanet 47 Carl Friedrich Gauss 47 Yun Qian 47 Freie Universitaet Berlin 47 Mars Squyres 47 Applied Physics Laboratory 47 Applied Physics Lab 47 Chandra Wickramasinghe 47 blackbody 47 Ramesh Raskar 47 Planetology 47 Gliese #e 47 Queloz 47 accretion disks 47 protoplanetary disks 47 credit NASA JPL 47 spacetime 47 Isabella Velicogna 47 Nir Shaviv 47 WIYN 47 spherules 47 astrobiology 47 ESO VLT 47 Erik Seiffert 47 Bad Astronomy 47 protons collide 47 Borucki 47 Nasa spacecraft 47 Don Yeomans 47 moon Europa 47 Dennis Mammana 47 Bok globules 47 Madhulika Guhathakurta 47 MIT Kavli Institute 47 Michael Flasar 47 gamma ray burst 47 alien civilizations 47 Cosmic Background Explorer 47 ESA XMM Newton 47 Oort cloud 47 atmospheric physicist 47 luminous galaxies 47 Qiang Fu 47 distant quasars 47 Arlen Huggins 47 Seoul Soongsil University 47 Spectroscopic Explorer 47 Terrestrial Planet Finder 47 unaided eye 47 Noctilucent clouds 47 sub millimeter wavelengths 47 superstrings 47 polar mesospheric clouds 47 Nasa Goddard Institute 47 Douglas Hudgins Kepler 47 renowned astrophysicist 47 circumstellar disks 47 comet Lulin 47 strangelets 47 Astrophysics MOA 47 Paul Alivisatos 47 Omega Centauri 47 space.com 47 twin STEREO spacecraft 47 Ed Weiler NASA 47 magnetar 47 Larry Mastin USGS 47 Helix Nebula 47 Caspar Ammann 47 astrophysics 47 Biospheric Sciences Laboratory 47 radial velocity technique 47 Saturn magnetosphere 47 Martin Guthold 47 Federico Capasso 47 airglow 47 polar caps 47 Comet Hartley 47 Kavli Institute 47 Harold Craighead 47 Suslick 47 William Kininmonth 47 Leon Lederman 47 David Wettergreen 47 Credit NASA CXC 47 exoplanetary systems 47 Jonathan Overpeck 47 Espenak 47 Stephan Quintet 47 Jeremy Bailenson 47 pronounced elongation 47 Jean Pierre Bibring 47 MPIfR 47 homochirality 47 Huchra 47 Spergel 47 http:/saturn.jpl.nasa.gov 47 energetic electrons 47 bolide 47 Hydrospheric 47 tholins 47 Shirshov Institute 47 ejecta 47 Manchester Jodrell Bank 47 tau neutrinos 47 Berkeley Seismological Laboratory 47 Hanny Voorwerp 47 Arecibo radar 47 Composite Infrared Spectrometer 47 Quadrantids 47 Einstein equations 47 van Dokkum 47 Wieslaw Maslowski 47 LIGO 47 Melosh 47 Nicholas Kotov 47 X ray afterglow 47 Jennifer Heldmann 47 Alan Plattus 47 gravitational lens 47 Samuel Kounaves 47 spectroscopically 47 Synte Peacock 47 PN Lebedev Physical 47 Einstein theory 47 radar altimetry 47 Helix nebula 47 Exoplanets 47 blocks harmful ultraviolet 47 Robotic Exploration 47 atmospheric oceanic 47 coronal loop 47 earthlike planets 47 Enrico Fermi Institute 47 neutrino oscillation 46 Weather Prediction 46 pulsars 46 STEREO mission 46 planetoid 46 Garrick Bethell 46 Fermi LAT 46 Alessandro Morbidelli 46 Brookhaven Relativistic Heavy 46 Einstein theories 46 zodiacal light 46 Chamberlin Observatory 46 Climate modelers 46 Stassun 46 infalling gas 46 physicist 46 Manned missions 46 ESRL 46 Polishook 46 neutrino 46 Planetary Studies 46 Einstein relativity theory 46 constellation Cetus 46 Carl Pilcher 46 Wide Angle Search 46 transiting exoplanets 46 Penzias 46 microlensing 46 cosmic cannibal 46 distant quasar 46 particle acceleration 46 orbiting gamma ray 46 NASA LCROSS 46 Astrobiology Magazine 46 Papovich 46 Alex Wissner Gross 46 Goldilocks zone 46 USGS seismologist 46 Douglas Osheroff 46 VB #b 46 Priyamvada Natarajan 46 Maskawa 46 gaseous planets 46 telescope Uranus 46 Shanghai Astronomical Observatory 46 Sibeck 46 orbital resonance 46 Schellnhuber 46 Gregory Benford 46 Jet Propulsion Laboratory JPL 46 journal Astrobiology 46 atmospheric aerosols 46 interplanetary spacecraft 46 Super Kamiokande 46 Quaoar 46 planets orbiting sun 46 Rogier Windhorst 46 Pan STARRS PS1 telescope 46 moon Ganymede 46 Venus Uranus 46 ultraviolet wavelengths 46 Convection Rotation 46 Jeffrey Hangst 46 Mauna Kea Hawaii 46 J# +# [002] 46 meteoroids 46 visible wavelengths 46 atmospheric sciences 46 hydrogen helium 46 Bryan Gaensler 46 particle colliders 46 Oded Aharonson 46 auroral emissions 46 protoplanetary 46 Margon 46 Astronomy 46 Explorer WISE 46 Jean Pierre Lebreton 46 RXTE 46 Professor Geim 46 Jodrell Bank Observatory 46 Alan Robock 46 Observatory LDEO 46 XMM Newton X ray 46 Rokhsar 46 O'Dor 46 WMAP satellite 46 barred spiral galaxy 46 Cassini magnetometer 46 olivine mineral 46 Harvard Smithsonian 46 Infrared Thermal Imaging Spectrometer 46 emits X rays 46 Winston Seiler 46 UDFy # 46 Neukum 46 ray Space Telescope