Related by context. Frequent words. (Click for all words.) 72 infrared wavelengths 68 wavelengths 65 X ray emission 64 GRBs 64 astronomical objects 63 unaided eye 62 distant galaxies 62 auroral 62 celestial object 61 infrared radiation 61 ultraviolet 61 gamma ray burst 61 gamma ray bursts 61 magnetar 61 interferometry 60 laser pulses 60 planet orbiting 60 planets orbiting 59 HD #b [002] 59 ultraviolet light 59 WIMPs 59 distant galaxy 59 XMM Newton 58 spectroscopic 58 Earth magnetosphere 58 spectra 58 UVB radiation 58 gamma rays 58 GeV 58 supernovae 58 elliptical galaxies 58 quasars 58 celestial objects 58 X ray beam 57 extrasolar planet 57 Saturn rings 57 picosecond 57 magnetic fields 57 extrasolar planets 57 redshift 57 wavelength 57 supernova remnant 57 nuclei 57 optical telescopes 56 femtoseconds 56 laser pulse 56 nebulae 56 auroras 56 Orion Nebula 56 UV radiation 56 luminosity 56 quasar 56 supernova explosion 56 cosmic ray 56 cosmic rays 56 aerosol particles 56 interstellar medium 56 COROT 56 silicates 56 globular clusters 56 infrared rays 55 rocky planets 55 interstellar dust 55 brown dwarf 55 galaxy cluster 55 meteoroids 55 spatial resolution 55 fluorescence 55 terrestrial planets 55 FRET 55 Saturn moon Enceladus 55 UV light 55 Eta Carinae 55 spiral galaxies 55 solar flares 55 atoms 55 ejecta 55 comet nucleus 55 NASA Cassini spacecraft 55 photons 55 infrared 55 orbits 55 Andromeda Galaxy 55 diffraction 55 substorms 54 occultation 54 galaxies 54 multispectral 54 planets 54 supernova explosions 54 Enceladus 54 corona 54 organic molecules 54 polar regions 54 fluorescent dyes 54 Quantum dots 54 super Earths 54 ionosphere 54 mid latitudes 54 gravitational lensing 54 filaments