Related by context. Frequent words. (Click for all words.) 72 ESO Very Large Telescope 65 Very Large Telescope 62 Keck Observatory 61 WM Keck Observatory 59 XMM Newton 59 infrared telescope 58 Gemini Observatory 57 optical telescope 57 Mauna Kea Hawaii 57 astronomical observatory 57 Very Large Array 57 observatories 57 telescope 57 telescopes 56 VLBA 56 adaptive optics 56 optical telescopes 56 hyperspectral 56 interferometry 55 Lick Observatory 55 Mini SAR 55 MODIS 55 interferometer 55 WFC3 55 COROT 55 ASTER 55 microlensing 55 scanning electron microscope 55 OSIRIS 54 CRISM 54 interplanetary spacecraft 54 astronomical observations 54 photometric 54 spectroscopic 53 IKONOS 53 ionospheric 53 multispectral 53 HRSC 53 auroral 53 observatory 53 spacecraft orbiting 52 synchrotron radiation 52 solar corona 52 Galaxy Evolution 52 geodesy 52 Remote sensing 52 CCD camera 52 Arecibo Observatory 52 bathymetry 52 SMOS 52 X ray telescope 52 InGaAs 52 Kitt Peak 52 Palomar Observatory 51 Pan STARRS 51 OGLE 51 Resolution Imaging 51 NICMOS 51 infrared 51 infrared spectrometer 51 Thermal Emission Imaging 51 confocal microscopy 51 NASA Cassini spacecraft 51 ESO 51 astronomers 51 La Silla Chile 51 Advanced Photon Source 51 infrared mapping spectrometer 51 Spectrometer 51 radiometer 51 NASA Chandra 51 National Optical Astronomy 50 spatial resolution 50 beamline 50 LCLS 50 polar orbiting 50 visible wavelengths 50 optical microscope 50 Hubble observations 50 volcanically active 50 active galactic nuclei 50 frequency comb 50 Hinode 50 Spitzer Space Telescope 50 Hubble Space Telescope 50 Moderate Resolution 50 NASA ESA Hubble 50 HiRISE 50 Voyager spacecraft 50 gravitational lensing 50 ESRF 50 extrasolar planet 50 NASA Aqua 50 Orion Nebula 50 orbiting telescope 50 Geophysical Institute 50 Crab Nebula 50 MARSIS 50 Observatories 49 CALIPSO 49 moon Charon