Synonyms and related words :
Cassegrainian telescope, Newtonian telescope, OAO, OSO, Texas tower, astronomical observatory, astronomical telescope, beacon, belvedere, bleachers, bridge, coelostat, conning tower, coronagraph, coronograph, gallery, gazebo, grandstand, heliostat, lighthouse, lookout, loophole, observation post, orrery, outlook, overlook, peanut gallery, peephole, pharos, planetarium, radar telescope, radio observatory, radio telescope, reflector, refractor, ringside, ringside seat, sighthole, spectrograph, spectroheliograph, spectrohelioscope, spectroscope, telescope, top gallery, tower, watchtower