[{"n": "Aerial telescope", "u": "/e/telescope-types/aerial-telescope/", "s": "A tubeless refracting telescope using a string to align objective and eyepiece."}, {"n": "Balloon-borne telescope", "u": "/e/telescope-types/balloon-borne-telescope/", "s": "Sub-orbital telescopes lifted by stratospheric balloons for cost-effective astronomy."}, {"n": "Cassegrain reflector", "u": "/e/telescope-types/cassegrain-reflector/", "s": "Folded optical path with concave primary and convex secondary mirrors."}, {"n": "Catadioptric system", "u": "/e/telescope-types/catadioptric-system/", "s": "Catadioptric systems combine lenses and mirrors for compact, corrected optics."}, {"n": "Crossed Dragone", "u": "/e/telescope-types/crossed-dragone/", "s": "Off-axis design preserving polarization with low diffraction systematics."}, {"n": "Dobsonian telescope", "u": "/e/telescope-types/dobsonian-telescope/", "s": "A large-aperture Newtonian reflector on a simple altazimuth mount."}, {"n": "Great refractor", "u": "/e/telescope-types/great-refractor/", "s": "Large achromatic refractors defined 19th and early 20th century astronomy."}, {"n": "Heliometer", "u": "/e/telescope-types/heliometer/", "s": "A telescope that splits its lens to measure angular distances."}, {"n": "Icaroscope", "u": "/e/telescope-types/icaroscope/", "s": "Nonlinear optical device for viewing bright and dark objects simultaneously."}, {"n": "Infrared telescope", "u": "/e/telescope-types/infrared-telescope/", "s": "Telescope using infrared light to detect celestial bodies."}, {"n": "Liquid-mirror space telescope", "u": "/e/telescope-types/liquid-mirror-space-telescope/", "s": "A space telescope using a rotating liquid mirror and artificial gravity."}, {"n": "Liquid-mirror telescope", "u": "/e/telescope-types/liquid-mirror-telescope/", "s": "A rotating liquid mirror forms a parabolic reflector for low-cost telescopes."}, {"n": "Lurie–Houghton telescope", "u": "/e/telescope-types/lurie-houghton-telescope/", "s": "Catadioptric telescope with spherical surfaces and Newtonian-style diagonal."}, {"n": "Maksutov telescope", "u": "/e/telescope-types/maksutov-telescope/", "s": "Catadioptric design using a meniscus corrector to correct aberrations."}, {"n": "Modified Dall–Kirkham telescope", "u": "/e/telescope-types/modified-dall-kirkham-telescope/", "s": "Modified Dall–Kirkham uses a lens group for improved off-axis performance."}, {"n": "Nasmyth telescope", "u": "/e/telescope-types/nasmyth-telescope/", "s": "A Cassegrain variant with side-exit light for heavy instruments."}, {"n": "Newtonian telescope", "u": "/e/telescope-types/newtonian-telescope/", "s": "The earliest known functional reflecting telescope, invented by Isaac Newton."}, {"n": "Pfund telescope", "u": "/e/telescope-types/pfund-telescope/", "s": "Fixed focal point telescope using a two-axis feed flat."}]