Related by context. Frequent words. (Click for all words.) 64 ESO Very Large Telescope 62 Very Large Telescope 58 WM Keck Observatory 57 XMM Newton 56 spectroscopic 56 Gemini Observatory 56 interferometry 55 solar corona 54 telescope 54 infrared telescope 54 Galaxy Evolution 54 optical telescopes 53 telescopes 53 Arecibo Observatory 53 spectrometer 53 Lick Observatory 53 OSIRIS 53 optical telescope 52 photometric 52 VLBA 52 THEMIS 52 infrared 52 Keck Observatory 52 Very Large Array 52 beamline 52 hyperspectral 52 GRB # 52 microlensing 52 COROT 51 X ray telescope 51 Comet McNaught 51 occultation 51 distant galaxy 51 infrared wavelengths 51 adaptive optics 51 multispectral 51 NASA ESA Hubble 51 Telescope 51 X ray emission 51 Spectrometer 51 gamma ray 51 extrasolar planet 51 NICMOS 51 unaided eye 50 OGLE 50 radiometer 50 comet nucleus 50 infrared spectrometer 50 Hubble observations 50 interplanetary spacecraft 50 astronomers 50 NASA Cassini spacecraft 50 Orion Nebula 50 gravitational wave 50 HD #b [002] 49 ESO 49 laser pulses 49 neutrino 49 NASA Kepler 49 Kitt Peak 49 Palomar Observatory 49 transmission electron microscope 49 redshift 49 imager 49 Observatories 49 gamma ray burst 49 distant galaxies 49 visible wavelengths 48 aurora 48 interferometer 48 quasars 48 extrasolar planets 48 NASA Aqua 48 X ray Observatory 48 magnetar 48 radar altimeter 48 Spitzer Space Telescope 48 confocal microscopy 48 supernova remnant 48 astronomical objects 48 infrared radiation 48 spacecraft orbiting 48 galaxy cluster 48 NASA Chandra 48 ASTER 48 SDSS 48 Solar Dynamics 48 GRBs 48 auroral 47 GRB 47 celestial object 47 spectrometry 47 Advanced Photon Source 47 spectroscopy 47 Gamma ray bursts 47 NASA JPL Caltech 47 LIGO 47 NASA Lunar Reconnaissance 47 optical microscopy 47 Space Telescope 47 gravitational lensing