Related by context. Frequent words. (Click for all words.) 67 Paranal 66 ESO Very Large Telescope 64 Very Large Telescope 63 La Silla 62 Keck telescope 61 Subaru Telescope 61 Southern Observatory ESO 61 Astronomical Observatory 59 WM Keck Observatory 58 Very Large Array 58 VIRTIS 58 Mauna Kea Hawaii 57 National Astronomical Observatory 57 astronomical telescope 56 VLBI 56 La Silla Chile 55 Keck Observatory 55 Planetary Physics 55 gravitational lens 55 COROT 55 Adaptive Optics 55 interplanetary spacecraft 54 Gemini Observatory 54 Crab Nebula 54 spectrographs 54 interferometric 53 planet Uranus 53 particle detectors 53 XMM Newton 53 STScI 53 radial velocity 53 optical wavelengths 53 Mini SAR 53 OSIRIS 53 Spectrometers 52 photometry 52 interferometry 52 photosphere 52 Advanced Photon Source 52 Arecibo Observatory 52 infrared telescope 52 microlensing 52 ESRF 52 solar corona 52 Credit NASA JPL 52 particle detector 52 Galaxy Evolution 52 astronomical observatory 52 interferometer 52 synchrotron radiation 52 Wilkinson Microwave Anisotropy Probe 52 OGLE 52 Steward Observatory 52 redshifts 52 LOFAR 51 Carnegie Observatories 51 X ray Observatory 51 European Synchrotron Radiation 51 Spectrometer 51 gravitational lensing 51 aurorae 51 Tycho Brahe 51 CfA 51 noctilucent clouds 51 Cepheids 51 Astrophysicists 51 photometer 51 planet orbiting 51 InSAR 51 ionospheric 51 Lick Observatory 51 spacecraft orbiting 51 gaseous planets 51 observatories 51 Cosmologists 51 NASA Chandra 51 active galactic nuclei 50 Observatories 50 planetary nebulae 50 geoid 50 spectroscopic 50 ultraviolet wavelengths 50 gravitational wave 50 scanning tunneling microscope 50 Galileo spacecraft 50 astronomers 50 National Optical Astronomy 50 VLBA 50 Siding Spring 50 magnetars 50 TerraSAR X 50 optical telescope 50 interferometers 50 NASA ESA Hubble 50 exosphere 50 lunar poles 49 astronomical observations 49 infrared wavelength 49 geodesy 49 anisotropy 49 telescope