Related by context. Frequent words. (Click for all words.) 60 telescope 58 Celestron 56 telescopes 54 astrophotography 53 planetarium 52 Telescopes 51 eyepieces 51 WFC3 50 STScI 50 interplanetary spacecraft 50 LROC 50 eyepiece 50 binocular 50 photometer 49 adaptive optics 49 Webb Telescope 49 HiRISE camera 49 astronomy 49 Telescope 48 Adaptive Optics 48 observatory 48 ESO Very Large Telescope 48 Cosmic Origins Spectrograph 48 infrared 48 Hubble Telescope 48 Pan STARRS 48 optical telescope 48 multispectral 47 infrared telescope 47 VLBA 47 spectrographs 47 Space Telescope 47 Hubble telescope 47 LCLS 47 Kitt Peak 46 imager 46 Solar Dynamics 46 SPIRE 46 NASAs 46 SIRTF 46 Paranal 46 NASA Goddard 46 CCD camera 45 Arecibo Observatory 45 Keck Observatory 45 X ray telescope 45 JWST 45 OSIRIS 45 spectrometer 45 Hubble Space Telescope 45 SkyScout 45 Fresnel lens 45 spacecraft orbiting 45 infrared camera 45 JPL manages 45 GigaPan 45 Lowell Observatory 45 Hubble 45 LSST 45 XMM Newton 45 CubeSat 44 photometry 44 Observatories 44 NASA GSFC 44 Astronomy 44 Planetarium 44 Binoculars 44 Galaxy Evolution 44 hyperspectral 44 orbiting telescope 44 Field Planetary Camera 44 confocal microscope 44 spectrograph 44 infrared imagery 44 interferometer 44 astronomical objects 43 HRSC 43 collimator 43 Amateur astronomers 43 scanning electron microscope 43 NRAO 43 Adler Planetarium 43 pinhole cameras 43 radiometer 43 Keck telescope 43 NASA JPL Caltech 43 optical telescopes 43 field Infrared Survey 43 Credit NASA JPL 43 binoculars 43 inflatable dome 43 radar altimeter 43 Palomar Observatory 43 optical wavelengths 42 SMOS 42 laser rangefinder 42 stargazing 42 www.nasa.gov 42 Flyby 42 spyglass 42 Very Large Array