Related by context. Frequent words. (Click for all words.) 53 XMM Newton 53 redshift 51 NASA ESA Hubble 50 Monthly Notices 50 Galaxy Evolution 49 WM Keck Observatory 49 SPIRE 49 NASA Chandra 49 solar corona 48 Gemini Observatory 48 NASA Cassini spacecraft 48 astronomical objects 48 interferometer 48 microlensing 48 supernova remnants 48 galaxy cluster 48 quasars 48 numerical simulations 47 LIGO 47 Pan STARRS 47 COROT 47 LCLS 47 interferometry 47 Hubble observations 47 distant galaxies 47 Observatories 47 WMAP 47 Palomar Observatory 47 Telescope 46 LSST 46 Lick Observatory 46 GRBs 46 Astrophysical Journal Letters 46 X ray emission 46 Space Telescope 46 optical telescope 46 planetary nebulae 46 celestial object 45 supernova remnant 45 Very Large Array 45 optical microscope 45 magnetar 45 ESO Very Large Telescope 45 IceCube 45 optical microscopy 45 multispectral 45 GRB # 45 infrared wavelengths 45 confocal 45 NASA Lunar Reconnaissance 45 Andromeda galaxy 45 Orion Nebula 45 infrared spectrometer 45 gravitational wave 45 Astrophysicists 45 transmission electron microscope 45 Very Large Telescope 45 astronomical observations 45 optical telescopes 44 Keck Observatory 44 extrasolar planet 44 infrared telescope 44 Spitzer Space Telescope 44 distant galaxy 44 extrasolar planets 44 NASA JPL Caltech 44 gravitational lensing 44 Hubble Telescope 44 frequency comb 44 Mimas 44 Astrophysicist 44 transmission electron microscopy 44 Kitt Peak 44 orbiting Saturn 44 hyperspectral 44 galaxy clusters 44 Type Ia supernovae 44 Astrophysical Journal 43 Max Planck Institute 43 Kuiper belt 43 galaxy formation 43 HHMI investigator 43 astronomers 43 JWST 43 spectroscopic 43 galaxies 43 nebulae 43 Lowell Observatory 43 exoplanets 43 telescope 43 Resolution Imaging 43 Global Surveyor 43 journal Astronomy 43 X ray Observatory 43 gamma ray burst 43 Advanced Camera 43 Gamma Ray 43 gamma ray bursts 43 NICMOS 43 gamma ray 43 scanning tunneling microscope