Synonyms and related words :
Cassegrainian telescope, Newtonian telescope, OAO, OSO, astronomical observatory, astronomical telescope, cheval glass, coelostat, concave mirror, convex mirror, coronagraph, coronograph, distorting mirror, glass, hand mirror, heliostat, looking glass, mirror, observatory, orrery, pier glass, planetarium, radar telescope, radio observatory, radio telescope, rear-view mirror, refractor, seeing glass, shaving mirror, spectrograph, spectroheliograph, spectrohelioscope, spectroscope, speculum, telescope, window mirror