Related by context. Frequent words. (Click for all words.) 57 XMM Newton 57 spectra 57 NICMOS 56 NASA Cassini spacecraft 55 X ray emission 55 multispectral 55 spectroscopic 55 visible wavelengths 55 auroral 54 interferometry 54 infrared wavelengths 54 astronomical observations 53 astronomical objects 52 celestial objects 52 THEMIS 52 HRSC 52 spiral galaxies 52 hyperspectral 52 CCD camera 51 planets orbiting 51 optical telescopes 51 supernova remnant 51 spectrometers 51 interferometer 51 COROT 51 flybys 50 VLBA 50 wavelengths 50 spatial resolution 50 gamma ray burst 50 WMAP 50 Voyager spacecraft 50 remote sensing satellites 50 Orion Nebula 49 ESO Very Large Telescope 49 redshift 49 galaxy cluster 49 laser pulses 49 infrared 49 magnification 49 photometric 49 spectrometry 49 coronal 49 imager 49 wavefront 49 reflectance 49 Mimas 49 extrasolar planets 49 spiral galaxy 49 amplitudes 49 Moderate Resolution 49 Eta Carinae 49 measurements 48 GRBs 48 synthetic aperture radar 48 diffraction 48 NASA Mars Reconnaissance 48 elliptical galaxies 48 ionospheric 48 occultation 48 optical microscopy 48 gravitational lensing 48 distant galaxies 48 spectrometer 48 Advanced Camera 48 galaxy clusters 48 scanning electron microscope 48 anisotropy 48 GeV 48 comet nucleus 48 CCDs 47 globular cluster 47 NASA ESA Hubble 47 Andromeda Galaxy 47 infrared spectrometer 47 sunspot 47 Landsat 47 Large Magellanic Cloud 47 orbits 47 kinematic 47 interplanetary spacecraft 47 imagers 47 microlensing 47 nebula 47 celestial object 47 optical microscope 47 Saturn rings 47 Milky Way Galaxy 47 Resolution Imaging 47 isotropic 47 quasar 47 parallax 47 radiometer 47 ICESat 47 focal lengths 47 telescope 47 adaptive optics 47 Cassini 46 cosmic microwave background 46 Global Surveyor 46 X ray beam