Related by context. Frequent words. (Click for all words.) 61 Space Telescope 55 Galaxy Evolution 55 XMM Newton 53 Resolution Imaging 51 optical telescopes 50 Telescope 50 Keck Observatory 49 HiRISE 49 Pan STARRS 49 Palomar Observatory 48 HRSC 48 solar corona 47 ESO Very Large Telescope 47 gamma ray 47 WM Keck Observatory 47 infrared telescope 47 X ray emission 47 NASA Goddard 47 Very Large Telescope 47 THEMIS 47 Gamma Ray 47 NASA Chandra 46 NASA Cassini spacecraft 46 Advanced Photon Source 46 LSST 46 NASA Kepler 46 Cassini Huygens 46 spatial resolution 45 GLAST 45 Gemini Observatory 45 astronomers 45 distant galaxies 45 COROT 45 LIGO 45 Astrophysicists 45 NASA Mars Reconnaissance 45 telescope 45 synchrotron radiation 45 Space Telescope Science 45 Spitzer Space Telescope 45 gravitational wave 45 astronomical observations 45 visible wavelengths 45 Remote sensing 45 adaptive optics 45 OGLE 45 multispectral 45 NRAO 45 Kitt Peak National 44 orbiting Saturn 44 astrophysicists 44 optical telescope 44 GRB # 44 NASA ESA Hubble 44 interplanetary spacecraft 44 Arecibo Observatory 44 spectroscopic 44 hyperspectral 44 SMOS 44 Observatories 44 NICMOS 44 beamline 44 spacecraft orbiting 44 Spectroscopy 44 X ray Observatory 43 Astrophysicist 43 Hubble observations 43 Lick Observatory 43 extrasolar planet 43 Kepler 43 redshift 43 infrared wavelengths 43 IceCube 43 QuickBird 43 ESA Mars 43 MARSIS 43 spectrometer 43 comet nucleus 43 astronomical objects 43 microlensing 43 Global Surveyor 43 Crab Nebula 43 MODIS 43 SPIRE 43 gravitational lensing 43 Hubble Telescope 42 Credit NASA JPL 42 Kepler telescope 42 galaxy cluster 42 distant galaxy 42 Kitt Peak 42 Mars Pathfinder 42 Orion Nebula 42 frequency comb 42 Type Ia supernovae 42 celestial objects 42 planetary scientist 42 VLBA 42 NASA Ames 42 ICESat 42 Mars Reconnaissance Orbiter