Related by context. Frequent words. (Click for all words.) 61 interferometry 60 XMM Newton 59 interferometer 59 ESO Very Large Telescope 57 telescope 56 distant galaxies 56 Very Large Telescope 56 telescopes 56 optical telescopes 56 distant galaxy 55 WM Keck Observatory 54 astronomers 54 WMAP 54 redshift 54 optical telescope 54 photometric 54 galaxy cluster 53 Telescope 53 gamma ray burst 53 spectroscopy 53 supernova remnant 53 adaptive optics 53 gamma ray 53 COROT 52 LIGO 52 X ray emission 52 infrared wavelengths 52 spectrometer 52 celestial objects 52 spectra 51 quasars 51 gravitational wave 51 NASA Chandra 51 gamma ray bursts 51 wavelengths 51 Orion Nebula 51 quasar 50 gravitational waves 50 transmission electron microscope 50 Space Telescope 50 X ray Observatory 50 cosmic ray 50 Spectrometer 50 planets orbiting 50 laser pulses 50 spectroscopic 50 extrasolar planet 50 astronomical observations 50 HD #b [002] 49 Milky Way Galaxy 49 synchrotron 49 exoplanet 49 spatial resolution 48 Large Magellanic Cloud 48 optical microscope 48 astrophysical 48 occultation 48 GRBs 48 planet orbiting 48 pulsar 48 Planck 48 wavelength 48 Eta Carinae 48 SDSS 48 infrared telescope 48 exoplanets 48 Astronomers 48 pulsars 48 CCD camera 48 infrared 48 Spitzer Space Telescope 47 spectrograph 47 orbits 47 galaxy clusters 47 spiral galaxy 47 Advanced Camera 47 multispectral 47 NASA Cassini spacecraft 47 imager 47 spectrometers 47 cosmic microwave background 47 comet nucleus 47 dwarf galaxy 47 IceCube 47 neutron stars 47 gravitational lensing 47 galaxies 47 unaided eye 47 THEMIS 46 Milky Way 46 Cassini 46 gamma rays 46 astrophysicists 46 femtosecond 46 diffraction 46 Hubble Space Telescope 46 brown dwarfs 46 STEREO 46 Observatories 46 infrared spectrometer 46 ESO