Related by context. Frequent words. (Click for all words.) 74 WM Keck Observatory 71 Keck Observatory 66 telescopes 65 Very Large Telescope 65 telescope 65 ESO Very Large Telescope 64 optical telescopes 63 observatories 63 infrared telescope 63 optical telescope 62 adaptive optics 61 Gemini Observatory 61 interferometer 61 XMM Newton 60 interferometry 60 Very Large Array 60 Pan STARRS 60 microlensing 59 spacecraft orbiting 59 Thirty Meter Telescope 59 spectroscopic 58 optical microscopy 58 astronomers 58 optical microscope 57 Lick Observatory 57 Arecibo Observatory 57 NASA Chandra 57 IceCube 57 VLBA 57 radiometer 57 NASA Cassini spacecraft 57 Mauna Kea 56 X ray Observatory 56 interplanetary spacecraft 56 Spitzer Space Telescope 56 transmission electron microscope 56 Hubble observations 56 spectrometers 55 spectrometer 55 NICMOS 55 CALIPSO 55 gravitational lensing 55 X ray telescope 55 Telescope 55 hyperspectral 55 astronomical observations 55 confocal microscopy 55 infrared wavelengths 55 Spectrometer 55 Haumea 55 astronomical observatory 55 scanning electron microscope 55 extrasolar planets 54 COROT 54 Galaxy Evolution 54 Hinode 54 Kitt Peak 54 planets orbiting 54 infrared spectrometer 54 spectrograph 54 InGaAs 54 NASA ESA Hubble 53 extrasolar planet 53 Telescopes 53 observatory 53 beamline 53 OSIRIS 53 ionospheric 53 distant galaxy 53 THEMIS 53 orbiting telescope 53 CloudSat 52 Voyager spacecraft 52 photometric 52 gravitational wave 52 optical tweezers 52 orbiting Saturn 52 orbiting spacecraft 52 Titan Saturn 52 Credit NASA JPL 52 Cassini orbiter 52 MODIS 52 photonic crystals 52 LIGO 52 radar altimeter 52 multispectral 52 GRB # 52 Gravity Probe B 52 imager 52 microscopic imager 52 NASA Lunar Reconnaissance 51 scanning tunneling microscope 51 Astronomers 51 Space Telescope 51 Cassini Huygens 51 CCD camera 51 photodetector 51 Cassini spacecraft 51 Envisat 51 planets circling 51 Fluorescence