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(Click for frequent words.) 75 orbit 72 orbiting 70 highly elliptical orbit 69 elliptical orbit 69 planet orbits 69 orbited 68 planets orbits 68 circular orbits 67 circular orbit 67 elliptical orbits 65 planets 64 Epsilon Eridani 64 eccentric orbits 64 WASP #b 63 Kepler 9c 62 Earth orbit 62 orbital 62 polar orbit 62 Upsilon Andromedae 62 KBOs 61 elongated orbit 61 Proxima Centauri 61 gaseous planet 61 icy moons 61 planets orbiting 61 retrograde orbit 61 highly elliptical orbits 60 star Gliese 60 Beta Pictoris b 60 galaxy 60 millisecond pulsars 60 X ray binary 60 elongated orbits 60 galactic disk 60 transiting planets 60 exoplanets orbiting 60 comets orbiting 60 magnetotail 60 occultations 59 millisecond pulsar 59 Saturn Cassini 59 spiral galaxy 59 perigee 59 brown dwarf 59 innermost planet 59 HD #b [002] 59 Churyumov Gerasimenko 59 Cancri e 59 perihelion 59 rotational axis 59 protoplanetary disk 59 Fomalhaut b 59 Jovian moons 59 galaxy M# [001] 59 galaxies 59 globular clusters 59 Milky Way galaxy 59 orbits Saturn 59 gravitational interaction 59 HL Tau 58 asteroids 58 supernova explosion 58 constellation Virgo 58 asteroid belt 58 orbital resonance 58 orbital eccentricity 58 spacecraft 58 AU Mic 58 gravitationally 58 red supergiant 58 Milky Way Galaxy 58 sunlike star 58 GRBs 58 planetary orbits 58 protoplanets 58 Triangulum 58 distant galaxy 58 intrinsic brightness 58 CoRoT #b 58 eclipsing binary 58 asteroid Vesta 58 gravitationally bound 58 Andromeda galaxy 58 comet #P/Churyumov-Gerasimenko 58 neutron star 58 constellation Ursa Major 58 moons orbiting 57 CoRoT 57 AGNs 57 lunar orbits 57 comets 57 Zeta Ophiuchi 57 Gliese #e 57 gravitational interactions 57 geostationary orbits 57 outer planets 57 orbital inclination 57 Uranus 57 globular cluster 57 HM Cancri 57 brown dwarfs 57 planet orbiting 57 Pluto Charon 57 infrared wavelengths 57 TrES 57 asteroid 57 lunar orbit 57 dwarf galaxy 57 arcseconds 57 moonlet 57 prograde 57 elliptical galaxies 57 constellation Pegasus 57 transiting planet 57 Kuiper Belt objects 57 aphelion 57 HD#b 57 S/# P2 56 super Earths 56 terrestrial planets 56 CoRoT satellite 56 radial velocity 56 Kuiper belt object 56 Oort cloud 56 Beta Pictoris 56 galaxy cluster 56 solar radii 56 Gliese 56 constellation Taurus 56 Kuiper belt 56 luminous galaxies 56 CoRoT 7b 56 hot Jupiters 56 sized planets orbiting 56 redshifts 56 Large Magellanic Cloud 56 elliptical galaxy 56 #P/Churyumov-Gerasimenko 56 Andromeda Galaxy 56 exoplanets 56 orbital velocity 56 celestial equator 56 Galilean moons 56 Mpc 56 Eta Carinae 56 gaseous planets 56 Earth asteroids 56 GQ Lupi 56 magnetars 56 Kuiper belt objects 56 star Proxima Centauri 56 New Horizons spacecraft 56 galaxy M# [002] 56 Oort Cloud 56 synchronous orbit 56 Earth radii 56 Toutatis 56 active galactic nuclei 56 retrograde orbits 56 asteroids orbiting 56 planet HD #b 56 ringed planet 56 Astronomical Units 56 Cepheids 56 jovian 56 planets moons 55 Kuiper Belt object 55 comet 55 celestial object 55 Saturnian moons 55 Iridium satellites 55 Kuiper Belt Objects 55 exo planets 55 Wolf Rayet star 55 GALEX 55 stellar occultations 55 constellation Carina 55 spiral galaxies 55 COROT 55 protoplanet 55 giant elliptical galaxy 55 extrasolar 55 moonlets 55 outermost planets 55 HD #b [001] 55 exoplanetary 55 Earthlike planets 55 constellation Sagittarius 55 orbited Earth 55 trans Neptunian objects 55 extrasolar planets 55 GeV 55 HAT P 55 Corot 9b 55 Lyra constellations 55 mu Arae 55 starburst galaxy 55 luminosities 55 constellation Libra 55 dwarf galaxies 55 stellar occultation 55 geosynchronous orbit 55 ultraviolet wavelengths 55 ecliptic plane 55 Epsilon Aurigae 55 Cassini 55 brightnesses 55 comet nucleus 55 Comet #P/Churyumov-Gerasimenko 55 rocky planets 55 Hot Jupiters 55 planets orbiting sun 55 occultation 55 Saturn rings 54 quasars 54 constellation Aquarius 54 solar corona 54 moons 54 celestial sphere 54 Comet Churyumov Gerasimenko 54 Jupiter Ganymede 54 celestial bodies 54 Saturn outermost moon 54 fainter objects 54 observable universe 54 sunlike stars 54 AB Aurigae 54 exoplanets planets 54 protostar 54 Arches Cluster 54 SIRTF 54 planetary Transits 54 axial tilt 54 Voyager spacecraft 54 Nasa spacecraft 54 transiting exoplanet 54 gravitational pulls 54 redshift 54 optical wavelengths 54 Red Rectangle 54 gamma ray bursts 54 planetesimals 54 constellation Cassiopeia 54 X ray telescopes 54 Comet Halley 54 Fomalhaut 54 star Fomalhaut 54 comet Churyumov Gerasimenko 54 GJ #b [002] 54 photosphere 54 occulted 54 tidally locked 54 merging galaxies 54 Kuiper Belt 54 sun synchronous orbit 54 XO 3b 54 eclipsing binaries 54 moon Io 54 planets asteroids 54 Ulysses spacecraft 54 microquasar 54 Gliese #c 54 planetary nebulae 54 constellation Centaurus 54 Orion Nebula 54 globulars 54 Small Magellanic Cloud 54 cosmological distances 54 cluster NGC 54 Pleiades star 54 planet Uranus 54 Solar TErrestrial RElations Observatory 54 interstellar dust grains 54 Comet Holmes 54 nebular 54 orbital rendezvous 54 metallicity 54 interstellar dust 54 exosphere 54 magnetar 54 distant galaxies 54 IBEX spacecraft 54 planets circling 54 Solar System 54 pulsars 53 supermassive black hole 53 protostars 53 red supergiants 53 gamma ray burst 53 spacecraft orbiting 53 Kepler #b 53 geo stationary orbit 53 planet transits 53 Carina constellation 53 galaxy NGC 53 nebulae 53 quasar 53 nebula 53 galactic halo 53 habitable zones 53 Comet Hartley 2 53 exoplanet orbiting 53 Trojan asteroids 53 polar orbits 53 lensing galaxy 53 supermassive 53 gamma ray emission 53 circumstellar disk 53 exosolar planets 53 stellar nurseries 53 Jupiter Uranus 53 supernova remnant 53 BepiColombo 53 gravitational tugs 53 magnetosphere 53 inhabitable planets 53 planemos 53 GJ#b 53 galactic clusters 53 outermost planet 53 moon Charon 53 accretion disk 53 Comet Hartley 53 ecliptic 53 comet Tempel Tuttle 53 orbiting planets 53 detect gravitational waves 53 starburst galaxies 53 planetary 53 moon Ganymede 53 elliptical polar 53 neutron stars 53 arcsec 53 baryon 53 cometary debris 53 gamma ray flares 53 gravitational 53 interstellar particles 53 Neptune Uranus 53 planet HD#b 53 Betelgeuse 53 asteroidal 53 Corot 7b 53 Jupiter magnetosphere 53 Comet Lulin 53 TrES 4 53 Jupiter moons 53 Comet Tempel Tuttle 53 pulsar 53 Geminga 53 slender crescent 53 planets Uranus 53 meteoroids 53 OGLE TR 52 Antennae Galaxies 52 X ray observatory 52 geosynchronous satellites 52 heliosphere 52 astronomical objects 52 ejecta 52 spacecraft Cassini 52 asteroid Itokawa 52 supernova explosions 52 X ray binaries 52 supernova 52 Hipparcos 52 exoplanet 52 Ultraviolet Imaging Spectrograph UVIS 52 asteroid Steins 52 microlensing events 52 supergiant star 52 galaxy clusters 52 binary asteroid 52 Earth magnetosphere 52 interacting galaxies 52 supernovae 52 constellation Hercules 52 P/# A2 52 Tauri Sb 52 Earth gravitational pull 52 Saturnian 52 Ring Nebula 52 flyby spacecraft 52 Orionids 52 X ray emission 52 Magellanic Clouds 52 MESSENGER spacecraft 52 constellation Cepheus 52 XMM Newton 52 gravitational slingshot 52 solar nebula 52 Delta Cephei 52 extrasolar planetary systems 52 XTE J# 52 substorms 52 Saturn magnetosphere 52 moons Phobos 52 X ray wavelengths 52 protoplanetary disks 52 entire Milstar constellation 52 HD# [002] 52 Konacki 52 MG J# +# 52 gravitational lenses 52 Milky Way 52 cosmic cannibal 52 potentially habitable planets 52 planetary transits 52 fiery reentry 52 Pluto Eris 52 Cepheid variables 52 orbit GEO 52 TW Hydrae 52 AUs 52 Galileo spacecraft 52 Cancri 52 Ranging spacecraft 52 STEREO spacecraft 52 gravitational attraction 52 supermassive black holes 52 Sun synchronous orbit 52 arcminutes 52 tidal bulge 52 ionosphere 52 comet orbit 52 RY Sagittarii 52 Earthlike planet 51 gravitational tug 51 Saturnian moon 51 radial velocities 51 circumstellar disks 51 distant quasar 51 astronomers 51 orbital radius 51 habitable planets 51 Rosetta spacecraft 51 GEochemistry 51 zodiacal constellations 51 planetary embryos 51 synchronous polar 51 Manned missions 51 THEMIS satellites 51 Halley comet 51 filamentary structure 51 submillimeter wavelengths 51 orbit insertion 51 BLG #Lb 51 flyby 51 R Coronae Borealis 51 Virgo cluster 51 interstellar space 51 accretion disks 51 Sedna 51 YORP effect 51 Wolf Rayet stars 51 Cassini spacecraft 51 Hubble orbits 51 proto galaxies 51 circumstellar 51 planet Gliese #c 51 asteroids comets 51 constellation Aries 51 spherical halo 51 plutoids 51 waning gibbous 51 Cassini Huygens 51 Hale Bopp 51 Earth orbit LEO 51 Deep Impact craft 51 Titan flyby 51 Relations Observatory STEREO 51 velocity dispersion 51 Kepler spacecraft 51 Kepler 9b 51 gravitational perturbations 51 planet WASP #b 51 orbited Jupiter 51 Gamma ray bursts 51 extrasolar planet 51 blue supergiant 51 Upsilon Andromedae b 51 antiparticles 51 SN #A 51 Cygnus Lyra region 51 Gliese #d 51 MErcury Surface Space ENvironment 51 Fornax cluster 51 galactic mergers 51 galactic cosmic rays 51 Galilean satellites 51 foreground galaxy 51 Rosetta orbiter 51 Tempel Tuttle 51 photometry 51 OGLE TR #b 51 heavily cratered 51 LORRI 51 Swift Tuttle 51 BP Piscium 51 mesosphere 51 gravitational pull 51 Hubble observations 51 geostationary orbit 51 Cassini Huygens spacecraft 51 proplyds 50 magnetic fields 50 VY Canis Majoris 50 sodium atoms 50 Pegasi 50 X ray pulses 50 Milky Way halo 50 PSR J# 50 Neutron stars 50 waxing gibbous moon 50 X ray emitting 50 velocities 50 arcsecond 50 astrophysical phenomena 50 Kuiper Belt Object 50 spiral galaxy NGC 50 orbiting spacecraft 50 planets orbiting distant 50 constellation Cetus 50 airglow 50 NEAs 50 MESSENGER 50 aspecting 50 interstellar dust particles 50 substorm 50 Hubble Constant 50 constellation Aquila 50 planets comets 50 Gravitational waves 50 APXS 50 coronal mass ejections 50 WFPC2 50 Orbiting 50 extrasolar planets orbiting 50 elliptical galaxy NGC 50 meteoritic material 50 Saturn Uranus 50 blazars 50 magnetospheric 50 Jupiter Saturn Uranus 50 SOHO spacecraft 50 satellites orbiting Earth 50 protons 50 Venusian 50 Pleiades cluster 50 Henize #-# 50 highly magnetized neutron 50 Encke gap 50 Enceladus 50 CMEs 50 ESA Huygens probe 50 comet chaser 50 constellation Ara 50 exo planet 50 afterglows 50 waxing crescent 50 star Spica 50 gravitational tides 50 impactors 50 BLG #L 50 Keplerian 50 ion propulsion 50 Lutetia 50 Evolution Explorer 50 orbital altitude 50 Cepheid variable 50 Stardust spacecraft 50 celestial phenomena 50 SIM PlanetQuest 50 Comet Machholz 50 fainter 50 constellation Monoceros 50 NASA Stardust spacecraft 50 Orionid meteors 50 IRAS #-# 50 moons Europa 50 Wolszczan 50 unaided eye 50 Hubble Space Telescope HST 50 planets orbiting stars 50 Yarkovsky effect 50 sextile 50 orbiter 50 impactor spacecraft 50 Pleiades 50 lunar equator 50 Uranus Neptune 50 Crab Nebula 50 globular cluster M# 50 astrometry 50 meteoroid 50 baryons 50 RX J# 50 Quadrantids 50 GRB #B 50 constellation Cygnus 50 lunar perigee 50 Type Ia supernova 50 constellation Auriga 50 planetary nebula 50 blazar 50 equatorial orbit 50 corona 50 solar flares 50 NASA Voyager spacecraft 50 celestial objects 50 habitable zone 50 infall 50 protoplanetary 50 EPOXI 50 Geminids 50 Comet Tempel 1 50 flybys 50 proto cluster 49 J# +# [002] 49 shepherding spacecraft 49 umbral shadow 49 comet Lulin 49 chromosphere 49 infrared wavelength 49 visible wavelengths 49 satellites orbiting 49 spacecraft flyby 49 tidally 49 Space ENvironment GEochemistry 49 microlensing 49 RXTE 49 galactic cores 49 Shackleton crater 49 smallest extrasolar planet 49 Jenniskens 49 antimatter particles 49 kaons 49 distant quasars 49 Eridani 49 dynamical evolution 49 Mimas 49 Earth orbiting satellites 49 galaxies collide 49 Alpha Centauri 49 interplanetary spacecraft 49 X ray observatories 49 orbiting observatories 49 planetary surfaces 49 impactor 49 Jupiter Saturn 49 Gliese #g 49 volcanic moon Io 49 LRO spacecraft 49 Bug Nebula 49 BP Psc 49 supernova remnants 49 Aurigae 49 Martian atmosphere 49 Hyakutake 49 oscillations 49 Saturnian system 49 coronagraph 49 proto planetary disk 49 gravitational microlensing 49 gamma ray observatory 49 retroreflector 49 supernovae explode 49 closest flyby 49 constellation 49 Anisotropy Probe WMAP 49 Saturn outermost 49 cosmic ray collisions 49 Haumea 49 galactic 49 orbiting satellites 49 Puppis 49 ionized gas 49 RRATs 49 NGC #A 49 lunar surface 49 Solar Terrestrial Relations 49 Cosmic rays 49 electric ion propulsion 49 Interstellar Boundary Explorer 49 solar minima 49 Muons 49 Planck satellite 49 Crab pulsar 49 comets asteroids 49 parsecs 49 Lunar Reconnaissance Orbiter LRO 49 gravitational wobbles 49 Helix Nebula 49 heliopause 49 reflection nebula 49 sun corona 49 TNOs 49 interstellar medium 49 satellites 49 Gemini constellation 49 galactic nuclei 49 orbiting telescope 49 Sojourner rover 49 Scorpii 49 Explorer WISE 49 RS Ophiuchi 49 redshifted 49 Flyby spacecraft 49 SN #gy 49 equator 49 ULIRGs 49 Europa Orbiter 49 GJ #b [001] 49 heliospheric 49 inner asteroid belt 49 Cassini flyby 49 KH #D 49 VIRTIS 49 zodiacal light 49 novae 49 comet hurtling 48 moon Mimas 48 planet TrES 48 electron flux 48 Saturn moon 48 spacetime 48 nucleon 48 baryonic 48 gamma rays 48 kpc 48 hypervelocity stars 48 geostationary 48 antiparticle 48 Galaxy Evolution 48 sidereal 48 gravitational acceleration 48 Virgo Cluster 48 helium atoms 48 Omega Centauri 48 Mandushev 48 geosynchronous orbits 48 geo synchronous 48 Geminid 48 coronal mass ejections CMEs 48 Magnetars 48 planet Gliese #g 48 SNe Ia 48 NGC# 48 gravity warps 48 hypersonic speeds 48 Wilkinson Microwave Probe 48 suns 48 swingby 48 Mercury Uranus 48 Coronal Mass Ejections 48 spatial dimensions 48 wavelengths 48 Huygens mission 48 spacecrafts 48 interstellar cloud 48 STEREO 48 XMM Newton X ray 48 zodiac constellations 48 orbiting observatory 48 Phobos 48 penumbral shadow 48 Ringed Planet 48 J#.# [001] 48 Fermi telescope 48 Earth magnetotail 48 binary asteroids 48 largest moon Charon 48 electron volts 48 Higgs bosons 48 Venusian atmosphere 48 emit X rays 48 galactic bulge 48 periodic dimming 48 Gerhard Schwehm 48 Coma cluster 48 Type Ia supernovas 48 Tempel 1 48 Itokawa 48 Orion nebula 48 picoseconds 48 thin crescent moon 48 X ray photons 48 SMBHs 48 antineutrinos 48 Methone 48 distant supernovae 48 neighboring Andromeda galaxy 48 Mars Odyssey spacecraft 48 wavelength infrared 48 radial velocity method 48 Elenin 48 Jupiter flyby 48 NFIRE satellite 48 martian atmosphere 48 aerobraking 48 outer corona 48 Quaoar 48 QQ# 48 Voyager probes 48 constellations Cygnus 48 noctilucent clouds 48 orbit GTO 48 orbiting Saturn 48 rotating neutron stars 48 ESA SMART 48 flyby Cassini 48 HD# [005] 48 comet Tempel 1 48 Optical Spectroscopic 48 relativistic particles 48 orbital insertion 48 Rosette Nebula 48 femtoseconds 48 Solar Orbiter 48 RQ# 48 Infrared Pathfinder Satellite 48 cosmic ray 48 Z boson 48 extrasolar planet HD #b 48 Leonids 48 Perseus Cluster 48 WMAP satellite 48 tidal tails 48 active galactic nucleus 48 cometary 48 Gerard Kuiper 48 coronal mass ejection 48 moons orbiting Saturn 48 crewed spacecraft 48 HIRES spectrometer 48 circularize 48 waxing crescent moon 48 Orbiter MRO 48 transiting exoplanets 48 polar vortex 48 prominences 48 dwarf spheroidal galaxies 48 smallest exoplanet 48 Earth 48 heliosheath 48 preset orbit 48 exoplanet discoveries 48 OSTM Jason 2 48 unmanned probes 48 nuclei 48 magnetic flux 48 cosmic dust 48 Perseids 48 NASA EPOXI mission 48 extragalactic 48 Kepler telescope 48 coronal loops 48 MN4 48 inner Oort Cloud 48 YU# 48 magnetic reconnection 48 Lagrangian 48 chondrites 48 antiproton 48 Comet #P 48 asterism 48 NEOSSat 48 constellation Andromeda 48 ellipse 48 constellation Eridanus 47 Mars Uranus 47 GRACE satellites 47 CoRoT 9b 47 gravitational keyhole 47 neutrino mass 47 planetoid 47 Jupiter moon Io 47 comet Hale Bopp 47 VLBA 47 Capricornus 47 Orionid 47 LCROSS 47 constellation Perseus 47 nightside 47 silicon monoxide 47 geomagnetic field 47 Coma Cluster 47 ballistic trajectory 47 masers 47 spacecraft orbited 47 pointings 47 Carinae 47 spiral galaxy Messier 47 Eagle Nebula 47 PSR B# 47 Messenger spacecraft 47 Geminid meteors 47 astronomical observations 47 sols 47 barred spiral galaxy 47 NASA Cassini spacecraft 47 z ~ 47 axions 47 Quadrantid meteor shower 47 SMBH 47 Earths 47 whiz harmlessly 47 Pluto 47 airbursts 47 Martian rovers 47 WISE spacecraft 47 spherically symmetric 47 comet Wild 47 galaxy redshift 47 planet gravitational tug 47 angular momentum 47 SMOS mission 47 Milankovitch cycles 47 Chang'eI 47 Odyssey orbiter 47 Lagoon Nebula 47 functioning gyroscopes 47 hundred thousandth 47 cometary material 47 geosynchronous 47 Terrestrial Planet Finder 47 spectroscopic observations 47 ESO VLT 47 asteroid Lutetia 47 rotational velocity 47 JWST 47 Io Europa 47 Cassini spacecraft orbiting 47 Kepler Telescope 47 EPOXI spacecraft 47 cosmic microwave radiation 47 GRB # 47 icy comets 47 navigate autonomously 47 apogee farthest point 47 constellation Lyra 47 muon 47 constellation Leo 47 particle beams 47 Milstar II 47 Venus transits 47 S/# [001] 47 interferometers 47 lunar crust 47 atoms 47 Martian equator 47 globular star 47 cosmic particles 47 dwarf planet 47 gravitational lens 47 coronal loop 47 GOCE 47 galactic collisions 47 moons circling 47 constellation Ophiuchus 47 Mars Pathfinder lander 47 gibbous moon 47 probe Chang'e 47 Yinghuo 1 47 Doppler shifts 47 Apophis asteroid 47 ROSAT 47 radial velocity technique 47 binary quasar 47 Global Surveyor 47 habitable worlds 47 Doradus 47 Planetary Transits 47 PZ Tel 47 SNR #-#.# 47 telescope orbits 47 Sagittarius B2 47 Hubble Space Telescope 47 W boson 47 Earths orbiting 47 Saturn moons 47 Interior Laboratory GRAIL 47 CAIs 47 shorter wavelengths 47 planetoids 47 Earth ionosphere 47 galactic magnetic 47 R#a# 47 Shoemaker Levy 47 UDFy # 47 GRB# 47 Triangulum Galaxy 47 supernovas 47 interstellar dust samples 47 reentry capsule 47 Huygens descent 47 ion thrusters 47 Saturnian moon Titan 47 Lulin