Related by context. Frequent words. (Click for all words.) 71 XMM Newton 68 Galaxy Evolution 66 NICMOS 66 COROT 65 solar corona 64 WFC3 63 spectroscopic 63 microlensing 62 infrared wavelengths 62 OGLE 62 Orion Nebula 61 ESO Very Large Telescope 61 astronomical objects 61 multispectral 60 active galactic nuclei 60 Very Large Telescope 60 THEMIS 60 Spitzer Space Telescope 60 La Silla Chile 60 redshift 60 extrasolar planet 60 Keck Observatory 60 Very Large Array 60 OSIRIS 60 NASA Cassini spacecraft 60 X ray telescope 60 hyperspectral 59 interferometry 59 extrasolar planets 59 WM Keck Observatory 59 radiometer 59 X ray emission 59 Cassini Huygens 59 NASA Cassini 59 infrared telescope 59 planetary nebulae 59 Voyager spacecraft 59 Space Telescope 59 Hubble observations 59 optical telescopes 58 Large Magellanic Cloud 58 HiRISE 58 NASA Chandra 58 STIS 58 JWST 58 NASA ESA Hubble 58 HRSC 58 VLBA 58 Mars Pathfinder 58 distant galaxy 58 planets orbiting 58 GRB # 58 exoplanets 58 CRISM 58 quasars 58 HD #b [002] 58 visible wavelengths 58 galaxy cluster 57 infrared spectrometer 57 Hinode 57 exoplanet 57 GRBs 57 astronomers 57 planetary nebula 57 Milky Way Galaxy 57 Chandra X ray 57 auroral 57 spectra 57 X ray Observatory 57 spacecraft orbiting 57 comet nucleus 57 Spectrometer 57 star Gliese 57 supernova remnant 57 gravitational lensing 56 elliptical galaxies 56 Resolution Imaging 56 Cassini 56 photometric 56 unaided eye 56 distant galaxies 56 ringed planet 56 ionospheric 56 moon Charon 56 CALIPSO 56 interplanetary spacecraft 56 MODIS 56 planet orbiting 56 SPIRE 56 Mimas 56 EPOXI 56 brown dwarfs 56 brown dwarf 56 Gemini Observatory 56 telescopes 56 Andromeda galaxy 56 Saturn moon Enceladus 56 Pan STARRS 55 Gamma ray bursts 55 Moderate Resolution 55 interstellar dust