Related by context. Frequent words. (Click for all words.) 62 telescope 61 optical telescope 56 telescopes 55 observatory 53 optical telescopes 53 Palomar Observatory 52 Southern Observatory ESO 52 astronomical observatory 52 camera obscura 51 spectrographs 50 infrared telescope 50 Arecibo Observatory 49 planetarium 49 particle detectors 49 eyepieces 49 Keck Observatory 49 astronomical objects 48 Pan STARRS 48 geodesic 48 Observatories 48 sundials 48 interplanetary spacecraft 48 interferometer 47 WFC3 47 Telescopes 47 cube shaped 47 eyepiece 47 HiRISE camera 47 Telescope 47 geodesic domes 47 ESO Very Large Telescope 47 interferometers 47 Celestron 47 colliders 47 stereoscope 46 scanning electron microscope 46 photometer 46 diametre 46 binocular 46 magnifying lens 46 celestial object 46 LIGO 45 Fresnel lens 45 Lick Observatory 45 sundial 45 Mauna Kea Hawaii 45 whale skeleton 45 Valles Marineris 45 Edwin Hubble 45 interferometric 45 Webb Telescope 45 refracting 45 diameter 45 Antikythera Mechanism 45 IceCube 45 adaptive optics 45 optical wavelengths 45 scanning tunneling microscope 45 astronomy 44 Andromeda galaxy 44 particle detector 44 VLBA 44 NASA ESA Hubble 44 Very Large Telescope 44 STScI 44 visible wavelengths 44 X ray telescope 44 astronomer 44 JWST 44 pinhole camera 44 Planetarium 44 macro lens 44 LROC 44 radiometer 44 Cosmic Origins Spectrograph 44 Kitt Peak 44 prisms 44 James Turrell 44 Observatory 44 Lowell Observatory 43 spherical 43 Cancri 43 Space Telescope 43 LSST 43 kinetic sculpture 43 optical microscope 43 Adaptive Optics 43 distant galaxy 43 celestial objects 43 dinosaur skeleton 43 Hubble telescope 43 infrared wavelengths 43 electron microscopes 43 CCD camera 43 multispectral 43 WM Keck Observatory 43 Mini SAR 43 electron microscope 43 Milky Way Galaxy 43 microscopes 43 LCLS