Related by context. Frequent words. (Click for all words.) 55 Southern Observatory ESO 52 IYA 52 Union IAU 52 IYA# 51 COROT 51 VIRTIS 51 Pasachoff 50 Paranal 50 Jean Jacques Dordain 49 Ed Weiler 49 STScI 49 Ed Weiler NASA 48 Albert Fert 48 Lunar Reconnaissance Orbiter LRO 48 Robert Aymar 48 Mauna Kea Hawaii 48 Samuel Ting 47 GALEX 47 Jill Tarter 47 XMM Newton 47 Cassini Huygens 46 Thirty Meter Telescope 46 Lunar Exploration 46 Dordain 45 Geodesy 45 Astronautics AIAA 45 CfA 45 HRSC 45 Keck Observatory 45 Astronomy 45 Leopold Eyharts 45 OSIRIS 44 Royal Astronomical Society 44 ESO Very Large Telescope 44 astronomical observations 44 International Astronomical 44 CoRoT 44 LOFAR 44 Carnegie Observatories 44 journal Astronomy 44 Janez Potocnik 44 SMOS 44 planetary science 44 Alfred McEwen 43 NASA Fermi Gamma 43 Bahcall 43 infrared telescopes 43 VLBI 43 National d' Etudes 43 ESA Mars 43 Carolyn Porco 43 Binzel 43 Particle Physics 43 National Astronomical Observatory 43 EPFL 43 Astrophysicist 43 Exoplanet 43 CNES 43 Planck 43 Nobel Physics 43 Astronomical Observatory 43 GOCE 43 Eumetsat 42 Solar System 42 Bruce Jakosky 42 Terrestrial Planet Finder 42 astronomers 42 Pan STARRS 42 UA Lunar 42 Udry 42 Slooh 42 DESY 42 Adaptive Optics 42 NASA Kepler 41 Commercial Spaceflight Federation 41 Proba 2 41 Donald Yeomans 41 AIAA 41 Comet McNaught 41 WM Keck Observatory 41 Research Commissioner Janez 41 MARSIS 41 WFC3 41 Hubble Telescope 41 Space Agency 41 GLAST 41 Cassini 41 Planetary Science 41 Keck telescope 41 orbiting Hubble Space Telescope 41 Sara Seager 41 Rosaviakosmos 41 Seth Shostak 41 Galaxy Evolution 41 EarthScope 41 Hubble observations 41 Enzo Boschi 40 EUMETSAT 40 planetary scientist 40 Leroy Hood 40 Wilkinson Microwave Anisotropy Probe