Related by context. Frequent words. (Click for all words.) 56 OSIRIS 56 OGLE 56 XMM Newton 56 solar corona 56 photometry 55 spectroscopic 55 planetary nebulae 55 radial velocity 55 SPIRE 55 interferometry 55 microlensing 54 Galaxy Evolution 54 Southern Observatory ESO 54 STScI 54 Hubble observations 54 ESO Very Large Telescope 54 galaxy cluster 53 numerical simulations 53 SDSS 53 extrasolar planet 53 Spitzer Space Telescope 53 galaxy formation 53 Andromeda galaxy 53 planet orbits 53 active galactic nuclei 53 globular cluster 52 CfA 52 Oort Cloud 52 NASA Chandra 52 elliptical galaxies 52 IceCube 52 Astrophysicists 52 redshift 52 Garching Germany 51 globular clusters 51 Orion Nebula 51 COROT 51 astrophysical 51 Type Ia supernovae 51 gravitational wave 51 STIS 51 Milky Way Galaxy 50 VLBI 50 NASA Cassini spacecraft 50 Keck Observatory 50 photometric 50 astrophysicists 50 orbiting Saturn 50 astronomical observations 50 galaxy clusters 50 particle detectors 50 interferometer 50 Pan STARRS 50 supernova remnants 50 supernova remnant 50 WM Keck Observatory 50 dwarf galaxy 50 astronomers 50 Mauna Kea Hawaii 50 dynamical 50 Cassini Huygens 50 infrared mapping spectrometer 49 La Silla Chile 49 quasar 49 distant galaxies 49 Mini SAR 49 COSMIC 49 Remote sensing 49 Very Large Telescope 49 planetary nebula 49 redshifts 49 NASA ESA Hubble 49 NASAs 49 Andromeda Galaxy 49 planet orbiting 49 supernovae 49 Spectrometer 49 MAVEN 49 HD #b [002] 49 galaxies 49 HARPS 49 gravitational lensing 49 Solar System 49 Credit NASA JPL 49 Nuclear Magnetic Resonance 48 CIRS 48 ESO 48 Monthly Notices 48 CALIPSO 48 muon 48 magnetic reconnection 48 SMOS 48 synchrotron radiation 48 Large Magellanic Cloud 48 quasars 48 Astrophysical Journal Letters 48 LIGO 48 Kuiper belt 48 NICMOS 48 distant galaxy 48 GEMINI