coelostat Definition

optical device, nicol prism, schmidt telescope, chromatoscope, perspicil, optigraph, maksutov telescope, terrestrial telescope, optical instrument, dynameter, biprism, solar telescope, telescope, light microscope, telestereoscope, ophthalmometer, wollaston prism, compound microscope, optical rotation, dioptrics, microscopium, polemoscope, cyclophoria, simple microscope, telespectroscope, angle of refraction, anaclastics, scioptics, opsiometer, megalethoscope, binocle, zograscope, galilean telescope, stauroscope, corotate, spherometer, demicircle, magnetic dip, lens, dipleidoscope, heliometer, telepolariscope, bisectrix, spectrohelioscope, reflex camera, dioptometer, catadioptrics, catopter, spherograph, semilens, horopter, optical phenomenon, oblique angle, spherical angle, optical activity, optometer, angle of reflection, holophote, eyepiece, magnetic lens, reclination, achromatic lens, clinostat, telescopy, optical telescope, newtonian telescope, astrocompass, circumvolution, collimator, clinodiagonal, magnetic north, alethoscope, radio interferometer, phakoscope, teinoscope, aplanat, helioscope, cosmorama, stereomonoscope, phenakistoscope, axis of rotation, pantascope, pseudoscope, phantascope, orbital plane, magnetograph, macropinacoid, galvanoscope, cosmolabe, microspectroscope, ultramicroscope, sidereal day, macrometer, angulometer, circumrotation, major axis, map projection, epidiascope, macroprism, brachypinacoid,