Related by context. Frequent words. (Click for all words.) 67 Palomar Observatory 58 Lick Observatory 56 Kitt Peak 55 Adaptive Optics 55 credit NASA JPL 54 Steward Observatory 54 Planetary Physics 54 Keck Observatory 54 Mauna Kea Hawaii 54 Subaru Telescope 53 Thermal Emission Imaging 53 Credit NASA JPL 53 System THEMIS 53 laser altimeter 53 infrared telescope 53 Keck telescope 52 infrared mapping spectrometer 52 Siding Spring 51 HiRISE camera 51 NASA JPL Caltech 51 Tropical Rainfall Measuring 50 optical telescope 50 orbiting Saturn 50 Kitt Peak National 50 NASA Stardust spacecraft 50 Applied Physics Lab 50 La Silla Chile 49 telescope 49 Tanegashima Space Center 49 WM Keck Observatory 49 Galaxy Evolution 49 Very Large Array 49 Kepler spacecraft 49 JPL manages 49 galaxy NGC 49 Valles Marineris 49 NASA Cassini spacecraft 49 Mars Surveyor Operations 49 spectrographs 48 Reconnaissance Orbiter 48 Messenger spacecraft 48 NASA Cassini 48 Large Binocular Telescope 48 Wallops Island Va. 48 Galileo spacecraft 48 National Astronomical Observatory 48 Jet Propulsion Lab 48 photometer 48 Santa Barbara UCSB 48 interplanetary spacecraft 48 Exoplanet 48 constellation Sagittarius 48 Horizons spacecraft 48 Garching Germany 48 Resolution Imaging 48 New Horizons spacecraft 48 THEMIS 48 NASA Fermi Gamma 47 Jet Propulsion Laboratory JPL 47 particle detector 47 ESO Very Large Telescope 47 Arecibo Observatory 47 astronomical telescope 47 Pan STARRS 47 Paranal 47 Nasa Jet Propulsion 47 Edwards AFB 47 asteroid Itokawa 46 Johns Hopkins Applied Physics 46 Solar Dynamics 46 radiometer 46 Martian equator 46 Olympus Mons 46 Free Electron Laser 46 multibeam 46 Cassini orbiter 46 Wildfire burns 46 NASA Spacecraft 46 Global Surveyor 46 Tranquility module 46 Gila Bend Ariz. 46 Opportunity rover 46 CubeSat 46 Gemini Observatory 46 field Infrared Survey 45 Carnegie Observatories 45 WFC3 45 Nanofabrication 45 fluorescence microscope 45 Cassini spacecraft 45 Lunar Reconnaissance Orbiter LRO 45 Very Large Telescope 45 infrared wavelengths 45 constellation Virgo 45 LIGO 45 interferometric 45 robotic spacecraft 45 Dulles VA 45 spacecraft orbiting 45 Mini SAR 45 LINEAR