Related by context. Frequent words. (Click for all words.) 72 OGLE 70 microlensing 60 ESO Very Large Telescope 60 XMM Newton 60 COROT 58 infrared telescope 58 WM Keck Observatory 58 Pan STARRS 58 Mauna Kea Hawaii 57 astronomers 57 extrasolar planet 57 Cassini Huygens 57 optical telescopes 57 Gemini Observatory 56 HARPS 56 IceCube 56 gravitational wave 56 Keck Observatory 56 Mini SAR 55 CfA 55 National Optical Astronomy 55 Galaxy Evolution 55 GRB # 55 X ray Observatory 55 LIGO 54 GRBs 54 exoplanets 54 NASA Chandra 54 HD #b [002] 54 Nicolaus Copernicus 54 particle detector 54 Spitzer Space Telescope 53 dwarf galaxy 53 extrasolar planets 53 NASA Kepler 53 CALIPSO 53 Very Large Telescope 53 Garching Germany 53 astronomical observations 53 astronomical observatory 53 NASA ESA Hubble 53 gamma ray burst 53 MARSIS 53 Observatories 53 gravitational lensing 53 Lick Observatory 52 supernova remnant 52 Very Large Array 52 magnetar 52 exoplanet 52 Cancri 52 EPOXI 52 THEMIS 52 CRISM 52 Astrophysicists 52 X ray emission 52 galaxy cluster 52 Space Telescope 52 magnetic reconnection 51 NASA Goddard 51 optical telescope 51 OSIRIS 51 Hinode 51 muon 51 SDSS 51 astrophysicists 51 Hubble observations 51 Astrophysicist 51 Spectrometer 51 quasars 51 VLBA 51 star Gliese 51 planetary nebulae 51 interplanetary spacecraft 51 La Silla Chile 50 planet orbiting 50 moon Charon 50 distant galaxy 50 active galactic nuclei 50 telescopes 50 X ray telescope 50 adaptive optics 50 planets circling 50 orbiting Saturn 50 super Earths 50 celestial object 50 galaxy clusters 50 NRAO 50 Quantum Optics 50 European Synchrotron Radiation 50 solar corona 50 brown dwarfs 50 Arecibo Observatory 49 supernova explosion 49 globular clusters 49 spectroscopic 49 auroral 49 astronomer 49 Andromeda Galaxy 49 SELENE 49 cosmic ray