Related by context. Frequent words. (Click for all words.) 64 astronomical telescope 61 optical telescope 61 telescopes 60 telescope 60 particle detectors 59 optical telescopes 58 Keck telescope 58 photometer 58 parabolic mirrors 57 heliostats 57 HiRISE camera 57 interplanetary spacecraft 57 collimated 57 LOFAR 57 Giant Magellan Telescope 56 interferometers 56 spectrographs 56 CCD camera 56 interferometer 56 particle detector 55 Lunar Reconnaissance Orbiter LRO 55 galaxy NGC 55 interferometric 55 photovoltaic arrays 55 Subaru Telescope 55 LCROSS spacecraft 55 SIRTF 55 WFC3 55 Large Synoptic Survey 55 Doppler radars 55 optical wavelengths 55 Mauna Kea Hawaii 54 interferometry 54 infrared 54 X ray telescope 54 IceCube 54 Live MOS sensor 54 CALIPSO 54 Carina Nebula 54 spectral imaging 54 scanning electron microscope 54 infrared telescope 54 observatories 53 diffraction pattern 53 beam splitter 53 gravitational lens 53 photometry 53 Cosmic Origins Spectrograph 53 Kepler spacecraft 53 telescopic camera 53 Hubble observations 53 Olympus Mons 53 Paranal 53 multispectral 53 visible wavelengths 53 spectrometers 53 Keck Observatory 53 Pan STARRS 53 Galileo spacecraft 53 X ray beams 53 LROC 53 orbiting Hubble Space Telescope 53 Diviner 53 lunar soil 53 colliders 53 hemispherical 53 NASA Cassini spacecraft 53 optical microscope 53 orbiting Saturn 52 constellation Sagittarius 52 polar vortex 52 celestial objects 52 astronomical objects 52 spherical 52 radiometer 52 ringed planet 52 X ray beam 52 supercomputer simulations 52 VLBA 52 Eagle Nebula 52 Valles Marineris 52 flyby spacecraft 52 planetary nebulae 52 spectrometer 52 Arecibo Observatory 52 infrared wavelength 52 lunar craters 52 frequency comb 52 Webb Telescope 52 optical microscopy 52 radar altimeter 52 distant galaxy 52 infrared imagery 52 Resourcesat 2 52 Remote sensing 52 Large Binocular Telescope 52 Extremely Large Telescope 52 Martian landscape 52 Andromeda Galaxy 52 Very Large Telescope 52 photoluminescence