Related by context. Frequent words. (Click for all words.) 52 VIRTIS 52 Spectrometer 51 spectrographs 50 XMM Newton 50 STScI 49 CIRS 49 Spectroscopy 46 Observational 45 ESO Very Large Telescope 45 spectrometers 45 spectroscopic 45 Tomography 45 SMOS 44 Remote sensing 44 Mauna Kea Hawaii 43 noctilucent clouds 43 Lunar Exploration 43 active galactic nuclei 43 Observations 43 infrared spectroscopy 43 HRSC 43 redshifts 43 radial velocity 43 scanning electron microscopy 43 infrared mapping spectrometer 43 CAPS 43 LOFAR 42 Meteorological Satellite 42 Space Telescope 42 Keck telescope 42 transmission electron microscope 42 CALIPSO 42 Cepheids 42 exosphere 42 ionospheric 41 Observing System 41 Multivariate 41 Oscillation 41 NASA Cassini 41 Galileo spacecraft 41 CMEs 41 WFC3 41 planetary missions 41 numerical simulations 41 scanning electron microscope 41 LROC 41 Very Large Telescope 40 photometry 40 Positioning System 40 planetary nebulae 40 Microscopes 40 Computer simulations 40 Observatories 39 Observation 39 observations 39 NASAs 39 EPOXI 39 tropospheric 39 Characterisation 39 COROT 39 Correlated 39 Oscillator 39 Resolution Stereo Camera 39 Tropical Rainfall Measuring 38 Keck Observatory 38 Weather Forecasts 38 Spitzer Space Telescope 38 Very Large Array 38 GRBs 38 astrophysical 38 Detectors 38 Flyby 38 infrared spectrometer 38 astronomical objects 38 NRAO 38 NASA Chandra 38 Envisat 38 optical telescopes 37 NASA Cassini spacecraft 37 InSAR 37 Geochemistry 37 Infrared 37 solar corona 37 Resolution Imaging 37 Morphology 37 ESOC 37 NASA Mars Reconnaissance 37 Electro Optical 37 Attenuation 37 SPPI 36 WM Keck Observatory 36 Cassini 36 Ockham Research 36 MetOp 36 telescopes 36 quantitative measurements 36 PRXL 36 GNVC 36 LRO 36 AGEN 36 numerical modeling