Related by context. Frequent words. (Click for all words.) 63 optical telescope 61 infrared telescope 59 telescope 59 galaxy NGC 58 Olympus Mons 57 photometer 57 particle detectors 56 diametre 56 spectrographs 56 HiRISE camera 56 particle detector 56 interferometers 55 optical telescopes 55 CCD camera 55 telescopes 54 Pan STARRS 54 interferometric 54 Kitt Peak 54 interplanetary spacecraft 53 #.#mm x #.#mm [001] 53 WFC3 53 LOFAR 53 telescopic camera 53 La Silla Chile 53 micrometre 53 Palomar Observatory 53 Andromeda galaxy 52 imager 52 Mauna Kea Hawaii 52 celestial object 52 optical wavelengths 52 superconducting magnet 52 optical microscope 52 radar altimeter 52 moon Enceladus 51 solar corona 51 multispectral 51 diameter 51 WASP #b 51 Andromeda Galaxy 51 Live MOS sensor 51 confocal microscope 51 Giant Magellan Telescope 51 interferometer 51 Arecibo Observatory 51 Telescope 51 photodetector 50 Keck Observatory 50 Valles Marineris 50 X ray beam 50 EarthScope 50 XMM Newton 50 Galaxy Evolution 50 diffraction pattern 50 visible wavelengths 50 Paranal 50 #mm #mm [002] 50 QuickBird 50 ESO Very Large Telescope 50 gamma ray burst 50 supernova remnant 50 3X optical zoom lens 50 polar vortex 49 Large Binocular Telescope 49 #-# mm 49 9cm 49 asteroid Itokawa 49 VLBA 49 gravitational lens 49 cuboid 49 Very Large Telescope 49 COROT 49 magnifications 49 photometry 49 LROC 49 spatial resolution 49 moon Charon 49 Very Large Array 49 GRB # 49 seismometer 49 Eta Carinae 49 New Horizons spacecraft 49 eyepieces 49 Mimas 49 infrared wavelengths 49 Keck telescope 49 hyperspectral 49 orbiting telescope 49 radial velocity 49 Southern Observatory ESO 49 Milky Way Galaxy 49 #inches 49 X ray telescope 48 Galileo spacecraft 48 comet nucleus 48 meteoroid 48 microlensing 48 rotor diameter 48 SIRTF 48 geoid 48 Kepler spacecraft