1. :en:400 Years of the Telescope
1. :en:A Philosopher Lecturing on the Orrery
1. :en:Abu-Mahmud Khujandi
1. :en:Accelerograph
1. :en:Active optics
1. :en:Active surface
1. :en:Adaptive optics
1. :en:ADRON-RM
1. :en:Advanced Technology Microwave Sounder
1. :en:Advanced very-high-resolution radiometer
1. :en:Al-Zarqali
1. :en:Alice (spacecraft instrument)
1. :en:Alidade
1. :en:Almucantar
1. :en:Altazimuth mount
1. :en:An Experiment on a Bird in the Air Pump
1. :en:Antique Telescope Society
1. :en:Aragoscope
1. :en:ARCADE
1. :en:Archeops
1. :en:ARGOS (optics system)
1. :en:Armillary sphere
1. :en:Astatic needles
1. :en:Astrarium
1. :en:Astrograph
1. :en:Astrolabe
1. :en:Astronomical rings
1. :en:Astroscan
1. :en:Atmosphere and Telescope Simulator
1. :en:Atmosphere-Space Interactions Monitor
1. :en:Atmospheric Chemistry Suite
1. :en:Autocollimator
1. :en:Autoguider
1. :en:Automated Patrol Telescope
1. :en:Automated Planet Finder
1. :en:Automatic picture transmission
1. :en:Backstaff
1. :en:Bahtinov mask
1. :en:Bailer (hydrogeology)
1. :en:Ballistic galvanometer
1. :en:Barcelona astrolabe
1. :en:Birmingham Solar Oscillations Network
1. :en:Bris sextant
1. :en:Bygrave slide rule
1. :en:Cabinet of curiosities
1. :en:Cachecam
1. :en:Carey mask
1. :en:Carl Gunnar Engström
1. :en:Cary 14 Spectrophotometer
1. :en:Cast Glance
1. :en:Cathetometer
1. :en:Cavallo's multiplier
1. :en:Celestial Sphere Woodrow Wilson Memorial
1. :en:Celloscope automated cell counter
1. :en:Center for Detectors
1. :en:Chabot Space and Science Center
1. :en:Cheiroscope
1. :en:Chemistry and Camera complex
1. :en:Cherenkov Telescope Array Observatory
1. :en:Christian Boyling
1. :en:Chronocinematograph
1. :en:CLEO (router)
1. :en:COCONet
1. :en:Coherence scanning interferometry
1. :en:Cole's quadrant
1. :en:Colorimeter (chemistry)
1. :en:Comet seeker
1. :en:Compton telescope
1. :en:CONSERT
1. :en:Cophasing
1. :en:Copyscope
1. :en:Corbett's electrostatic machine
1. :en:Cosmic Dust Analyzer
1. :en:Cosmic Ray Subsystem
1. :en:Cosmolabe
1. :en:Coudé Spectrograph
1. :en:Craig telescope
1. :en:Cranmer Park
1. :en:Crookes tube
1. :en:Cross bow quadrant
1. :en:Cross head (surveying)
1. :en:Cyanometer
1. :en:Dark Energy Spectroscopic Instrument
1. :en:Davis quadrant
1. :en:Demi-cross
1. :en:Deposit gauge
1. :en:Dichroscope
1. :en:Diffraction-limited system
1. :en:Dioptra
1. :en:Dioptrics
1. :en:Disappearing-filament pyrometer
1. :en:Dividing engine
1. :en:Diviner
1. :en:DNA sequencer
1. :en:DORIS (satellite system)
1. :en:Dorpat Great Refractor
1. :en:Double violin
1. :en:DU spectrophotometer
1. :en:Dual segmented Langmuir probe
1. :en:Dual-polarization interferometry
1. :en:Dynameter
1. :en:Dynamic Albedo of Neutrons
1. :en:Ecotron
1. :en:Eidouranion
1. :en:Eise Eisinga Planetarium
1. :en:Electric bath (electrotherapy)
1. :en:Electricity meter
1. :en:Electrophorus
1. :en:Electrostatic generator
1. :en:ELODIE spectrograph
1. :en:Elton's quadrant
1. :en:Enceladus Icy Jet Analyzer
1. :en:Equatorial mount
1. :en:Equatorial platform
1. :en:Equatorial ring
1. :en:Equatorial room
1. :en:Equatorium
1. :en:Erygmascope
1. :en:ESPRESSO
1. :en:Europa Ultraviolet Spectrograph
1. :en:European Pulsar Timing Array
1. :en:ExoLife Finder
1. :en:EXPRES
1. :en:F. J. Duarte
1. :en:FARSIDE telescope
1. :en:Fiber-optic Improved Next-generation Doppler Search for Exo-Earths
1. :en:FIELDS
1. :en:Filar micrometer
1. :en:First light (astronomy)
1. :en:Foucault knife-edge test
1. :en:Fourier-transform infrared spectroscopy
1. :en:FOXSI Sounding Rocket
1. :en:Franklin's electrostatic machine
1. :en:Friedrich Adolph Nobert
1. :en:Galaxy H-Alpha Fabry-Perot System
1. :en:Galileo and Ulysses Dust Detectors
1. :en:Galperin configuration
1. :en:Gamma Ray Spectrometer (2001 Mars Odyssey)
1. :en:Geophone
1. :en:Geostationary Carbon Cycle Observatory
1. :en:Geostationary Earth Radiation Budget
1. :en:Giant Radio Array for Neutrino Detection
1. :en:Global Ecosystem Dynamics Investigation
1. :en:Global Ozone Monitoring by Occultation of Stars
1. :en:Global-scale Observations of the Limb and Disk
1. :en:Globe of Matelica
1. :en:Glossmeter
1. :en:Gnomon
1. :en:Gnomon of Saint-Sulpice
1. :en:GoTo (telescopes)
1. :en:GRAVITY (Very Large Telescope)
1. :en:Gravity science (Juno)
1. :en:Greenland Telescope
1. :en:Groma (surveying)
1. :en:Groombridge Transit Circle
1. :en:Gualterus Arsenius
1. :en:H-BRUV
1. :en:Habitability, Brine Irradiation and Temperature
1. :en:Hale Telescope
1. :en:HARPS-N
1. :en:Hartmann mask
1. :en:Harvard Collection of Historical Scientific Instruments
1. :en:Hazcam
1. :en:Haze meter
1. :en:Heat Flow and Physical Properties Package
1. :en:Helios Dust Instrumentation
1. :en:Herschel wedge
1. :en:Hexapod-Telescope
1. :en:High Accuracy Radial Velocity Planet Searcher
1. :en:High Resolution Stereo Camera
1. :en:Hilger & Watts
1. :en:HiROS
1. :en:History of the telescope
1. :en:Holotomography
1. :en:Honcheonsigye
1. :en:Hood's cross-staff
1. :en:Horace Bénédict de Saussure
1. :en:Hydroscope
1. :en:Hyeronymus Sirturus
1. :en:Image-forming optical system
1. :en:Inertial Stellar Compass
1. :en:Infinite-axis telescope
1. :en:Infrared interferometer spectrometer and radiometer
1. :en:Infrared Spectrometer for ExoMars
1. :en:Instrument of the Primum Mobile
1. :en:Integral field spectrograph
1. :en:Integrated Science Investigation of the Sun
1. :en:Intensity interferometer
1. :en:Interior Characterization of Europa using Magnetometry
1. :en:International Coronelli Society for the Study of Globes
1. :en:International Liquid Mirror Telescope
1. :en:International Lunar Observatory
1. :en:International Pulsar Timing Array
1. :en:Jacob's staff
1. :en:JEDI
1. :en:Johann Michael Ekling
1. :en:Jovian Auroral Distributions Experiment
1. :en:Jovian Infrared Auroral Mapper
1. :en:Jovilabe
1. :en:Kepler photometer
1. :en:Keyhole problem
1. :en:Lala Bulhomal Lahori
1. :en:LaRa
1. :en:Large electrostatic generator (Teylers)
1. :en:Large Latin American Millimeter Array
1. :en:Las Cumbres Observatory
1. :en:Les William
1. :en:Level (optical instrument)
1. :en:Liquid-mirror telescope
1. :en:List of astronomical instruments
1. :en:List of original copies of the Porter Garden Telescope
1. :en:List of surveying instruments
1. :en:List of telescope parts and construction
1. :en:List of viewing instruments
1. :en:Liulin type instruments
1. :en:Long Lived In-situ Solar System Explorer
1. :en:Lovibond comparator
1. :en:Lunar Surface Electromagnetics Experiment
1. :en:LYRA
1. :en:Magnetometer (Juno)
1. :en:Mariner's astrolabe
1. :en:Mars Climate Sounder
1. :en:Mars Organic Molecule Analyser
1. :en:Mars Radiation Environment Experiment
1. :en:MARSIS
1. :en:MASCARA
1. :en:Mass Spectrometer for Planetary Exploration
1. :en:Materials Adherence Experiment
1. :en:Maunakea Spectroscopic Explorer
1. :en:Maxwell's thermodynamic surface
1. :en:MEMS testing
1. :en:Meridian circle
1. :en:MERMAID
1. :en:Microwave humidity sounder
1. :en:Microwave Radiometer (Juno)
1. :en:Microwave sounding unit
1. :en:MIMOS II
1. :en:MINERVA-Australis
1. :en:Mini-TES
1. :en:Miniature Exoplanet Radial Velocity Array
1. :en:Minoan Moulds of Palaikastro
1. :en:Mirror galvanometer
1. :en:MKF-6 (multispectral camera)
1. :en:Modular optoelectronic multispectral scanner
1. :en:MoonLIGHT
1. :en:MSSTA
1. :en:Multi-component gas analyzer system
1. :en:Multi-conjugate Adaptive optics Demonstrator
1. :en:Multi-parametric surface plasmon resonance
1. :en:Multicolor Active Galactic Nuclei Monitoring
1. :en:Mural instrument
1. :en:MySky
1. :en:N-slit interferometer
1. :en:Nadir and Occultation for Mars Discovery
1. :en:Narrabri Stellar Intensity Interferometer
1. :en:Nastulus
1. :en:Navcam
1. :en:Neeff's wheel
1. :en:Neptec Design Group
1. :en:Next-Generation Transit Survey
1. :en:Nocturnal (instrument)
1. :en:Non-achromatic objective
1. :en:Nonius (device)
1. :en:Noyes Armillary Sphere
1. :en:Nuclear Compton Telescope
1. :en:Null detector
1. :en:Ocean-bottom seismometer