Related by context. Frequent words. (Click for all words.) 63 XMM Newton 60 WFC3 59 solar corona 58 Very Large Telescope 58 VLBI 57 optical telescope 57 hyperspectral 57 infrared wavelengths 57 optical telescopes 57 COROT 57 adaptive optics 56 infrared telescope 56 visible wavelengths 56 ESO Very Large Telescope 56 interferometry 56 interplanetary spacecraft 55 spectroscopic 55 Galaxy Evolution 55 telescopes 55 MARSIS 55 interferometer 55 spatial resolution 55 NICMOS 54 Southern Observatory ESO 54 IceCube 54 planetary nebulae 54 WM Keck Observatory 54 active galactic nuclei 54 observatories 54 X ray emission 54 gravitational wave 53 Pan STARRS 53 photometry 53 GRBs 53 telescope 53 astronomical objects 53 Hubble observations 53 VLBA 53 NASA ESA Hubble 53 Andromeda galaxy 53 Remote sensing 53 distant galaxies 52 extrasolar planet 52 redshifts 52 distant galaxy 52 multispectral 52 spacecraft orbiting 52 WASP #b 52 occultation 52 confocal 52 particle detectors 52 astronomers 52 ESO 52 wavelengths 52 microlensing 52 gravitational lensing 52 astronomical observations 51 interstellar dust 51 aurorae 51 Gamma ray bursts 51 Saturn moon Enceladus 51 photometer 51 Space Telescope 51 Milky Way Galaxy 51 Crab Nebula 51 Orion Nebula 51 auroral 51 Telescope 51 numerical simulations 51 optical microscopy 51 Mauna Kea Hawaii 51 frequency comb 51 radial velocity 51 Cassini Huygens 51 gamma ray 51 gamma ray burst 51 ringed planet 51 ionized gas 51 Spitzer Space Telescope 51 unaided eye 51 Keck Observatory 51 magnetic reconnection 50 synchrotron radiation 50 celestial object 50 Astrophysicists 50 observable universe 50 SMOS 50 LSST 50 quasars 50 attosecond 50 galaxy cluster 50 infrared 50 InGaAs 50 magnetars 50 optical microscopes 50 Gemini Observatory 50 remote sensing satellites 50 particle detector 50 colliders 50 X ray Observatory 50 X ray telescope