telescope - a magnifier of images of distant objectsaperture - a device that controls amount of light admitted astronomical telescope - any telescope designed to collect and record electromagnetic radiation from cosmic sources collimator - a small telescope attached to a large telescope to use in setting the line of the larger one magnifier - a scientific instrument that magnifies an image optical prism, prism - optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image transit instrument - a telescope mounted on an axis running east and west and used to time the transit of a celestial body across the meridian |