Related by context. Frequent words. (Click for all words.) 55 Giant Magellan Telescope 53 Extremely Large Telescope 49 convex mirror 48 Large Synoptic Survey 47 Eagle Nebula 47 optical telescope 47 constellation Taurus 47 Epsilon Eridani 46 Mauna Kea Hawaii 46 binnacle 46 spectrographs 46 telescope 46 constellation Sagittarius 45 #ft #.#m [003] 45 Steward Observatory 45 #x#x# [005] 45 Pancam 45 submillimeter 45 X ray telescopes 45 constellation Lyra 45 Statement Smile 45 #cm diameter 45 Large Binocular Telescope 45 Lick Observatory 45 particle detector 44 #'x# [002] 44 scanning electron microscope 44 constellation Virgo 44 WM Keck Observatory 44 Large Telescope 44 GALEX 44 magnifications 44 collimated 44 hexagon shaped 44 transmission electron microscope 44 diameter 44 HiRISE camera 43 rectangular shaped 43 E ELT 43 galaxy NGC 43 Paranal 43 telescopes 43 laser altimeter 43 photonic crystal 43 THEMIS 43 parabolic mirrors 43 arched ceiling 43 1c x 43 nanometers billionths 43 orbiting Saturn 43 infrared telescopes 43 ESO Very Large Telescope 43 astronomical telescope 43 Olympus Mons 43 ecliptic 43 fluorescence microscope 42 celestial equator 42 tetrahedron 42 diameters ranging 42 AKARI 42 mahog 42 Keck Observatory 42 #.#mx #.#m [001] 42 refractor 42 microscopic imager 42 diametre 42 NASA Cassini 42 eyepieces 42 Saturnian system 42 Science Experiment HiRISE 42 #.#ft [003] 42 refracting 42 eyepiece 42 aperture 42 planets orbiting stars 42 mirror 42 canted 42 equilateral triangle 42 beveled glass 42 WFC3 42 constellation Libra 41 Subaru Telescope 41 #.#mm x #.#mm [001] 41 centimeter diameter 41 rotate clockwise 41 granite pedestal 41 brightly illuminated 41 tiebacks 41 Very Large Telescope 41 coffered ceiling 41 rectangular 41 coronagraph 41 reflector 41 backlighted 41 scanning tunneling microscope 41 interplanetary spacecraft 41 Galaxy Evolution 41 4 chars 41 ellipse 41 optical telescopes 41 Observatory telescope