Related by context. Frequent words. (Click for all words.) 60 telescope 58 spectrometer 58 Advanced Camera 58 Hubble Space Telescope 57 imager 56 Very Large Telescope 54 spectroscopic 54 adaptive optics 54 Hubble telescope 53 Hubble 52 infrared wavelengths 51 Space Telescope 51 spacecraft 50 mass spectrometer 50 gamma ray burst 50 infrared 49 telescopes 49 Hubble Telescope 49 redshift 49 CCDs 49 distant galaxies 48 spectrometers 48 quasar 48 neutron 48 laser pulse 48 NASA Cassini spacecraft 48 Einstein theory 48 astronomers 48 JWST 48 laser pulses 48 gyroscopes 48 cosmic ray 47 spectroscopy 47 pulsars 47 Telescope 47 detector 47 Cassini 47 dwarf galaxies 47 infrared laser 47 orbiting 47 Spitzer Space Telescope 47 cosmic microwave background 46 WMAP 46 Mars Reconnaissance Orbiter 46 electron beam 46 photon 46 brown dwarf 46 Huygens 46 THEMIS 46 X ray Observatory 46 exoplanet 46 gamma ray 46 orbiter 46 optical 45 wavelengths 45 infrared radiation 45 infrared camera 45 MESSENGER 45 laser 45 LCROSS 45 solar arrays 45 gyroscope 45 pulsar 45 sensor 45 extrasolar planets 45 ultraviolet light 45 quasars 45 NASA Chandra 45 diffraction 45 Planck 45 impactor 45 photons 45 magnetic fields 44 gamma ray bursts 44 lasers 44 liquid helium 44 gamma rays 44 astronomer 44 spatial resolution 44 lander 44 robotic arm 44 Saturn rings 44 galaxy clusters 44 optically 44 brown dwarfs 44 Atlantis astronauts 44 ultraviolet 44 planets orbiting 44 particle accelerator 44 detectors 44 satellites 44 neutrino 43 Phoenix lander 43 Mars Global Surveyor 43 supernovae 43 electron microscope 43 synchrotron 43 exoplanets 43 Orbiter 43 tomography 43 Cassini spacecraft