-3.499	Italy
-4.327	Astronomy
-4.355	Peer review
-4.371	Moon
-4.377	Cartography
-4.471	Asteroid
-4.509	Mars
-4.525	Canary Islands
-4.558	Sun
-4.581	Bhutan
-4.631	History of geodesy
-4.713	Electron
-4.718	Light
-4.729	Ming Dynasty
-4.738	Comet
-4.747	Infrared
-4.762	Italians
-4.771	Planet
-4.787	Selenographic coordinates
-4.797	Islamic calendar
-4.800	San Jose, California
-4.812	Glass
-4.814	Wavelength
-4.824	KStars
-4.839	Minute of arc
-4.870	Galileo Galilei
-4.883	Surveying
-4.887	Astronomical unit
-4.899	Jupiter
-4.908	Refractive index
-4.909	Apparent magnitude
-4.940	Helium
-4.945	Computer graphics
-4.972	European Space Agency
-4.988	Semaphore line
-4.994	Tank
-4.997	Scattered disc
-5.003	University of Arizona
-5.008	Ornithology
-5.009	Saturn
-5.021	Spectroscopy
-5.023	Astrophysics
-5.029	Right ascension
-5.046	Google Earth
-5.053	Spacecraft
-5.062	Parsec
-5.085	James Clerk Maxwell
-5.087	Viking Age
-5.104	Arthur Wellesley, 1st Duke of Wellington
-5.105	Sidereal time
-5.109	Heliograph
-5.109	Rocket
-5.110	Philo Farnsworth
-5.126	Mercury (planet)
-5.129	Microscope
-5.134	Matter
-5.148	Extraterrestrial life
-5.148	Johannes Kepler
-5.149	Lithium
-5.151	Squid
-5.166	Neptune
-5.170	Liège
-5.171	Supernova
-5.177	Lincoln Near-Earth Asteroid Research
-5.192	Image
-5.193	Hawaii (island)
-5.193	Functional programming
-5.222	Uranus
-5.224	Equatorial coordinate system
-5.230	Aperture
-5.233	History of Christianity
-5.235	Parallax
-5.238	Observation
-5.242	Retrograde and prograde motion
-5.246	Nicolaus Copernicus
-5.250	Star catalogue
-5.254	History of Europe
-5.257	Binary star
-5.276	Big Bang
-5.285	Observatory
-5.287	Robert Hooke
-5.287	Astrometry
-5.306	Camera lens
-5.311	Scientific revolution
-5.319	Abū Rayḥān al-Bīrūnī
-5.328	Near-Earth Asteroid Tracking
-5.329	Astronomy in medieval Islam
-5.342	Orders of magnitude (numbers)
-5.350	Variable star
-5.350	Mirror
-5.351	Proper motion
-5.353	Focal length
-5.356	Optical engineering
-5.375	Christopher Wren
-5.376	Space exploration
-5.376	Geocentric model
-5.377	Edmond Halley
-5.378	Parabola
-5.399	Birdwatching
-5.407	List of asteroid-discovering observatories
-5.408	Heliocentrism
-5.446	Alhazen
-5.447	Cartagena, Colombia
-5.448	Christiaan Huygens
-5.453	Titan (moon)
-5.461	Camille Saint-Saëns
-5.464	Battle of Trafalgar
-5.471	Eris (dwarf planet)
-5.473	Broad gauge
-5.474	Space probe
-5.478	History of cartography
-5.478	Chromatic aberration
-5.482	Redshift
-5.484	Rings of Saturn
-5.489	Indian astronomy
-5.491	Hydrogen cyanide
-5.493	Sir George Stokes, 1st Baronet
-5.495	Luminosity
-5.496	Muḥammad ibn Mūsā al-Khwārizmī
-5.503	Astrolabe
-5.503	Tycho Brahe
-5.519	Quasar
-5.522	Wernher von Braun
-5.524	Globular cluster
-5.529	Lanthanum
-5.531	Carl Zeiss AG
-5.531	Light pollution
-5.538	Grand Duchy of Tuscany
-5.543	Measuring instrument
-5.544	European Southern Observatory
-5.554	George Biddell Airy
-5.560	Aldershot
-5.561	Amateur astronomy
-5.567	Nasir al-Din al-Tusi
-5.572	Diversity of fish
-5.582	Al-Kindi
-5.584	Anderson Mesa Station
-5.588	Moons of Jupiter
-5.594	Google Sky
-5.594	Occultation
-5.600	Johnny Carson
-5.600	Open cluster
-5.605	Philippine Atmospheric, Geophysical and Astronomical Services Administration
-5.610	Richmond Park
-5.615	Deep Impact (spacecraft)
-5.621	Optical microscope
-5.631	Andromeda Galaxy
-5.632	Astrochemistry
-5.633	William Herschel
-5.635	Magic in Harry Potter
-5.636	Jeremiah Horrocks
-5.638	Space observatory
-5.639	Spitzer Space Telescope
-5.644	Radio telescope
-5.645	Theodolite
-5.647	United States Capitol rotunda
-5.649	Armillary sphere
-5.650	Ohio Wesleyan University
-5.653	Gravitational lens
-5.655	Space Shuttle Columbia
-5.661	Perspective distortion (photography)
-5.662	Solar variation
-5.664	List of photographic equipment makers
-5.665	List of tallest buildings and structures in the world
-5.669	Sunspot
-5.675	Iron sight
-5.677	Comet Hale–Bopp
-5.678	Qutb al-Din al-Shirazi
-5.679	Frederick Reines
-5.680	Betelgeuse
-5.684	Papier-mâché
-5.690	Aristarchus of Samos
-5.694	Fused quartz
-5.698	Makemake (dwarf planet)
-5.699	Robert Hofstadter
-5.705	Science in the Middle Ages
-5.705	List of most luminous stars
-5.708	Pentax
-5.714	Rings of Jupiter
-5.714	Timeline of Chinese history
-5.726	Balloon (aircraft)
-5.727	Refracting telescope
-5.738	Orion (constellation)
-5.740	Street light
-5.745	Pleiades
-5.746	Australian Geographic
-5.747	Stellar parallax
-5.747	Chinese astronomy
-5.748	Coma (cometary)
-5.750	24th century
-5.756	Christian VIII of Denmark
-5.759	List of Greek words with English derivatives
-5.762	Exocomet
-5.765	H II region
-5.768	Apollo Command/Service Module
-5.771	Cornhill, London
-5.775	Attitude control
-5.775	Magnification
-5.776	Far side of the Moon
-5.777	Transit of Venus
-5.780	Russell's teapot
-5.783	William Kwong Yu Yeung
-5.783	Galilean moons
-5.785	Optical telescope
-5.789	Atmospheric refraction
-5.794	Optical aberration
-5.797	Role of the Catholic Church in Western civilization
-5.797	Moon landing
-5.802	Chandra X-ray Observatory
-5.808	Timekeeping on Mars
-5.811	Darian calendar
-5.812	Transit (astronomy)
-5.818	Infrared astronomy
-5.818	Sydney Harbour Bridge
-5.820	Thermographic camera
-5.820	Frits Zernike
-5.827	Zoom lens
-5.843	Anti-reflective coating
-5.846	Atmosphere of Jupiter
-5.846	Proxima Centauri
-5.853	Aristotelian physics
-5.858	Messier object
-5.859	Objective (optics)
-5.861	Double star
-5.862	Bloomsburg, Pennsylvania
-5.868	Europa (mythology)
-5.868	List of German inventors and discoverers
-5.869	Comet Pojmański
-5.872	C-type asteroid
-5.872	Centrifugal casting (silversmithing)
-5.876	David Brewster
-5.881	Paraboloid
-5.882	Geography of Mars
-5.882	Seicento
-5.884	41P/Tuttle–Giacobini–Kresák
-5.885	List of Arabic star names
-5.887	Comet tail
-5.888	Viewfinder
-5.892	Huygens (spacecraft)
-5.892	Observational astronomy
-5.895	Geology of the Moon
-5.898	Adaptive optics
-5.903	Photometry (astronomy)
-5.903	Cydonia (region of Mars)
-5.906	Great Comet of 1680
-5.909	Joint Dark Energy Mission
-5.913	Science and technology in the United States
-5.916	Naked eye
-5.919	Tarleton State University
-5.921	Indirect fire
-5.929	Technological and industrial history of the People's Republic of China
-5.929	List of The Incredibles characters
-5.934	Diffraction-limited system
-5.935	Aquarius (constellation)
-5.937	Pan-STARRS
-5.938	Spherical aberration
-5.939	Jack Sparrow
-5.941	Oliver Smithies
-5.943	Near Earth Object Surveillance Satellite
-5.944	Science and technology in Iran
-5.944	Star of Bethlehem
-5.945	European and American voyages of scientific exploration
-5.945	List of English inventions and discoveries
-5.946	Iapetus (moon)
-5.952	Taqi al-Din Muhammad ibn Ma'ruf
-5.953	Image stabilization
-5.956	Visible-light astronomy
-5.958	Sextant
-5.959	Banū Mūsā
-5.966	History of Bhutan
-5.970	STD Bus
-5.972	Sijzi
-5.972	Astronomical seeing
-5.972	Charles Algernon Parsons
-5.973	Cancer (constellation)
-5.976	List of Chinese inventions
-5.982	History of Western civilization
-5.985	Planets in science fiction
-5.985	Periscope
-5.986	Meridian circle
-5.988	Museum of the History of Science, Oxford
-5.988	Gamma Andromedae
-5.991	Lowell Observatory
-5.993	The Book of Healing
-5.993	Haleakalā National Park
-5.996	Astronomical interferometer
-5.996	Solar telescope
-5.997	Equatorial mount
-5.998	Photometric-standard star
-6.001	Orion Nebula
-6.009	Xinglong Station (NAOC)
-6.010	Mural instrument
-6.012	Israel Space Agency
-6.016	Philipp Franz von Siebold
-6.016	Muḥammad ibn Jābir al-Ḥarrānī al-Battānī
-6.016	Jamshīd al-Kāshī
-6.017	Intussusception (medical disorder)
-6.018	Peel, Isle of Man
-6.027	Mirage
-6.028	Grove City College
-6.029	Clementine (spacecraft)
-6.029	Vision in fishes
-6.030	Cranbrook Educational Community
-6.032	Glass-ceramic
-6.037	Encyclopedia of the Brethren of Purity
-6.037	Ulugh Beg
-6.038	Book of Optics
-6.039	Crimean Astrophysical Observatory
-6.039	Great Observatories program
-6.039	Albireo
-6.041	Thābit ibn Qurra
-6.048	Galaxy group
-6.055	List of NASA missions
-6.056	Selenography
-6.059	Maria Mitchell
-6.060	Wesel
-6.063	Maragheh observatory
-6.065	Christianity in the 17th century
-6.066	Astigmatism
-6.067	International Ultraviolet Explorer
-6.068	Abu Ma'shar al-Balkhi
-6.075	10 Hygiea
-6.080	National Museum of Nature and Science
-6.082	Al-Khazini
-6.082	List of laser applications
-6.082	Johannes Hevelius
-6.085	Conceptual metaphor
-6.086	Mike, Lu & Og
-6.087	3 Juno
-6.088	International Year of Astronomy
-6.088	Abū Ishāq Ibrāhīm al-Zarqālī
-6.092	Orbiting Carbon Observatory
-6.092	Abd al-Rahman al-Sufi
-6.093	Rangaku
-6.094	17th century
-6.100	Airy disk
-6.104	Ahmad ibn Muhammad ibn Kathīr al-Farghānī
-6.104	History of science and technology in Mexico
-6.106	Gravity Probe B
-6.109	Science and technology in Bulgaria
-6.111	Peter Barlow (mathematician)
-6.113	Copernican heliocentrism
-6.115	Outline of astronomy
-6.116	Athīr al-Dīn al-Abharī
-6.118	List of Sharpe series characters
-6.119	Library Company of Philadelphia
-6.119	Telerobotics
-6.119	Margaret Burbidge
-6.120	Ali Qushji
-6.125	Angular distance
-6.126	List of Greek and Latin roots in English
-6.127	Gliese 581 d
-6.131	Western Connecticut State University
-6.140	Bedford School
-6.143	Monoceros
-6.144	STS-35
-6.146	Spaceguard
-6.148	Scientific instrument
-6.149	Abū Ja'far al-Khāzin
-6.152	Light curve
-6.154	Zij
-6.154	Big Dipper
-6.156	Altazimuth mount
-6.158	Al-Birjandi
-6.162	Definition of planet
-6.165	English words of Greek origin
-6.167	Abu-Mahmud Khojandi
-6.167	Birr
-6.170	Paranal Observatory
-6.171	List of constellations
-6.171	Antares
-6.174	Amateur telescope making
-6.176	History of science policy
-6.177	Tau Ceti
-6.177	Roger Joseph Boscovich
-6.177	Flag of New England
-6.180	Barnard's Star
-6.184	Terrestrial Planet Finder
-6.192	United States Space Surveillance Network
-6.197	Hellas Planitia
-6.197	Book of Fixed Stars
-6.202	Thermoelectric cooling
-6.204	Large Millimeter Telescope
-6.207	Habash al-Hasib al-Marwazi
-6.212	Einstein Observatory
-6.213	Clyde Tombaugh
-6.213	Far Ultraviolet Spectroscopic Explorer
-6.214	Pulkovo Observatory
-6.215	Gemini Observatory
-6.215	Giovanni Battista Riccioli
-6.221	Subject–object problem
-6.223	Gliese 876
-6.223	Firmament
-6.224	Diurnal motion
-6.224	Harriet Martineau
-6.224	Heaton Park
-6.228	Bausch & Lomb
-6.231	Voynich manuscript
-6.235	Solar tracker
-6.239	List of Muslim astronomers
-6.246	Omega Nebula
-6.247	Messier 54
-6.247	Reflector sight
-6.248	Advanced Technology Large-Aperture Space Telescope
-6.249	Messier 81
-6.249	Deconvolution
-6.252	Electromagnetic wave equation
-6.255	List of African-American inventors and scientists
-6.256	Moon in fiction
-6.257	Optical comparator
-6.259	Vulpecula
-6.259	Farpoint
-6.262	Apparent retrograde motion
-6.263	List of inventors
-6.264	Spektr-RG
-6.265	Brazos Bend State Park
-6.265	Trunnion
-6.266	McDonald Observatory
-6.267	Dialogue Concerning the Two Chief World Systems
-6.269	ABC Afterschool Special
-6.269	History of Mars observation
-6.273	Setting circles
-6.274	Qāḍī Zāda al-Rūmī
-6.276	Gliese 1
-6.276	ESO 3.6 m Telescope
-6.276	New Worlds Mission
-6.277	Gliese 581 e
-6.277	Carolyn S. Shoemaker
-6.277	Observational cosmology
-6.277	Extremely large telescope
-6.280	Jabir ibn Aflah
-6.281	Point spread function
-6.281	Shackleton (crater)
-6.281	Optical instrument
-6.283	Transformers: Generation 1
-6.288	Lens flare
-6.288	WIND (spacecraft)
-6.289	Melbourne Observatory
-6.291	List of largest optical reflecting telescopes
-6.293	Orbiting Astronomical Observatory
-6.293	Aspheric lens
-6.295	Jor-El
-6.297	Between the Lions
-6.299	SN 1054
-6.300	Coma (optics)
-6.302	Spica
-6.302	List of Dutch inventions and discoveries
-6.303	Ibn Yunus
-6.304	Ibn al-Banna' al-Marrakushi
-6.306	Alidade
-6.306	Giambattista della Porta
-6.307	William Parsons, 3rd Earl of Rosse
-6.309	Telescope mount
-6.310	Lagoon Nebula
-6.310	Istanbul observatory of Taqi al-Din
-6.315	Trifid Nebula
-6.315	Deep-sky object
-6.316	Frasier (season 9)
-6.318	Jean Picard
-6.318	Knighton, Powys
-6.319	Observing the Moon
-6.319	BeppoSAX
-6.322	Piszkéstető Station
-6.324	Volans
-6.325	Ibn al-Shatir
-6.327	Former constellations
-6.327	Paolo Sarpi
-6.328	1948
-6.329	Sidereus Nuncius
-6.332	Mercury cadmium telluride
-6.332	Cadi Ayyad University
-6.335	Cystoscopy
-6.339	Fresnel Imager
-6.342	Apochromat
-6.344	Bahāʾ al-dīn al-ʿĀmilī
-6.345	Llano de Chajnantor Observatory
-6.347	Robotic telescope
-6.348	Air mass (astronomy)
-6.349	Telescopium
-6.354	Association of Universities for Research in Astronomy
-6.358	Exploration of Mercury
-6.359	Optical Gravitational Lensing Experiment
-6.361	January 3
-6.361	Aurelia and Blue Moon
-6.361	Ulugh Beg Observatory
-6.366	Herschel 400 Catalogue
-6.366	Roque de los Muchachos Observatory
-6.366	Economic history of the Netherlands (1500–1815)
-6.367	Zij-i Ilkhani
-6.369	Messier 82
-6.374	WorldWide Telescope
-6.376	Al-Nayrizi
-6.376	1964
-6.377	Sahl ibn Bishr
-6.377	Simon Marius
-6.378	History of longitude
-6.378	Edward Troughton
-6.378	Collodion
-6.379	Nur ad-Din al-Bitruji
-6.379	Assassin's Creed IV: Black Flag
-6.381	History of the Big Bang theory
-6.382	Nicolas-Claude Fabri de Peiresc
-6.383	Hale telescope
-6.386	Ibn al-Majdi
-6.389	Shams al-Dīn al-Samarqandī
-6.395	Granat
-6.395	Coronagraph
-6.398	Upsilon Andromedae
-6.400	Stadiametric rangefinding
-6.401	William Lassell
-6.403	TAUVEX
-6.404	Diamond turning
-6.404	Shams al-Dīn Abū Abd Allāh al-Khalīlī
-6.404	Messier 7
-6.407	1600s in England
-6.407	Galileo affair
-6.408	Astron (spacecraft)
-6.409	Wolf 359
-6.410	Al-Ḥajjāj ibn Yūsuf ibn Maṭar
-6.410	List of museums in Atlanta
-6.413	Astronomical Netherlands Satellite
-6.417	Octant (instrument)
-6.420	First light (astronomy)
-6.421	Edward Emerson Barnard
-6.421	Gamma Arietis
-6.422	Perceptor
-6.423	Pic du Midi de Bigorre
-6.424	Walter Baade
-6.425	Emoji
-6.428	Dunsink Observatory
-6.429	CORALIE spectrograph
-6.429	Black Eye Galaxy
-6.432	History of materials science
-6.434	Discovery of Neptune
-6.434	Ekathotsarot
-6.435	Airy function
-6.436	NASA Infrared Telescope Facility
-6.440	HD 192263
-6.442	The Time Tunnel
-6.443	Samuel Butler (poet)
-6.447	Abu al-Salt
-6.448	James Hartness
-6.448	Glossary of firearms terms
-6.450	Houston Museum of Natural Science
-6.451	William Henry Smyth
-6.451	Ravens of the Tower of London
-6.452	Geology of Venus
-6.453	Live fire exercise
-6.454	Array of Low Energy X-ray Imaging Sensors
-6.455	St Clears
-6.455	Bortle scale
-6.455	XEUS
-6.457	55 Cancri
-6.457	Leo II (dwarf galaxy)
-6.458	Beta Aquarii
-6.458	Fremont Peak State Park
-6.461	Star party
-6.462	Leiden Observatory
-6.462	HR 8799
-6.462	Copernican Revolution
-6.462	Al-Saghani
-6.463	Sextant (astronomical)
-6.463	Norden bombsight
-6.464	Doctor Light (Kimiyo Hoshi)
-6.465	Uraniborg
-6.465	Messier 4
-6.466	Bureau des Longitudes
-6.467	James Bowdoin
-6.468	History of supernova observation
-6.468	Messier 78
-6.468	Jost Bürgi
-6.469	Muḥammad ibn Ibrāhīm al-Fazārī
-6.470	Kapteyn's Star
-6.471	History of the telescope
-6.471	NGC 147
-6.475	Mu'ayyad al-Din al-'Urdi
-6.476	Director (military)
-6.477	Military history of Bhutan
-6.480	Bisei Spaceguard Center
-6.484	Cat's Eye Nebula
-6.487	List of Unicode characters
-6.488	Zij-i Sultani
-6.488	Gliese 682
-6.490	Five College Radio Astronomy Observatory
-6.492	Kushyar Gilani
-6.493	Linguistic purism in Icelandic
-6.493	Connections (TV series)
-6.494	QUIET
-6.497	Ibn al‐Ha'im al‐Ishbili
-6.498	The Return of the Native
-6.499	Green flash
-6.499	North America Nebula
-6.499	Eskimo Nebula
-6.500	Lacaille 8760
-6.503	Rosette Nebula
-6.503	History of optics
-6.504	Skyhook balloon
-6.505	Cranbrook School, Kent
-6.506	Alchabitius
-6.507	The Gold-Bug
-6.508	Said Al-Andalusi
-6.509	Yaʿqūb ibn Ṭāriq
-6.510	Mariner 3
-6.512	Large Synoptic Survey Telescope
-6.513	Phases of Venus
-6.514	Ibn Abi al-Shukr
-6.515	Transit of Venus, 1639
-6.515	DX Cancri
-6.516	ABRIXAS
-6.517	July 31
-6.518	Barreleye
-6.518	Internationalism (linguistics)
-6.518	Tusi-couple
-6.519	Gliese 687
-6.519	Leith Hill
-6.522	Highland Road Park Observatory
-6.523	ʿAjā'ib al-makhlūqāt wa gharā'ib al-mawjūdāt
-6.523	Konica Minolta Tower Centre
-6.525	2002 AA29
-6.526	Light-field camera
-6.528	Berlin Observatory
-6.530	James Whitney Young
-6.533	Lake Tianchi Monster
-6.533	North Carolina Museum of Natural Sciences
-6.534	Air Force Maui Optical and Supercomputing observatory
-6.537	St. John's water dog
-6.537	Messier 14
-6.542	Discovery and exploration of the Solar System
-6.543	Karl Schwarzschild Observatory
-6.543	Cosmic pluralism
-6.543	Tunnel vision
-6.544	Messier 80
-6.547	Liquid mirror telescope
-6.549	List of American words not widely used in the United Kingdom
-6.553	Antarctic Muon And Neutrino Detector Array
-6.554	MMT Observatory
-6.557	Asimov's Biographical Encyclopedia of Science and Technology
-6.557	Messier 23
-6.560	Aelita
-6.561	Juan Araneta
-6.561	Monocular
-6.563	Dominion Astrophysical Observatory
-6.563	Messier 10
-6.564	Samuel Thomas von Sömmerring
-6.564	Messier 5
-6.564	Kuma Kogen Astronomical Observatory
-6.566	Messier 9
-6.566	Spotting scope
-6.568	Hans Lippershey
-6.569	Najm al-Dīn al-Qazwīnī al-Kātibī
-6.571	Sind ibn Ali
-6.572	GJ 1061
-6.573	Meade Instruments
-6.573	Sibt al-Maridini
-6.574	Philosophy of Freedom
-6.578	John Brashear
-6.581	Jamal ad-Din (astronomer)
-6.583	Fata Morgana (mirage)
-6.584	Birr Castle
-6.586	Mills Observatory
-6.587	Soyuz 35
-6.589	Speckle imaging
-6.590	Body Double
-6.590	Guillermo González Camarena
-6.594	Vulcan (hypothetical planet)
-6.598	Gliese 674 b
-6.598	Photographic lens design
-6.598	Coup (bridge)
-6.598	Pallikaranai wetland
-6.601	Telescoping (mechanics)
-6.603	Mount Lowe Railway
-6.604	Zacharias Janssen
-6.605	Ali ibn Isa al-Asturlabi
-6.611	Calar Alto Observatory
-6.612	MPG/ESO telescope
-6.615	65 Cybele
-6.615	United States v. Jackalow
-6.622	Earl of Rosse
-6.622	Lucky imaging
-6.624	Dumfries Museum
-6.625	Henri Chrétien
-6.631	Mount Graham
-6.631	List of Jesuit scientists
-6.632	Pieter van Musschenbroek
-6.637	The Big Bang Theory (season 4)
-6.642	Saturn Nebula
-6.642	Khālid ibn ʿAbd al‐Malik al‐Marwarrūdhī
-6.642	Molėtai Astronomical Observatory
-6.643	Leonardo Donato
-6.644	Cesare Cremonini (philosopher)
-6.646	One Tree Hill, New Zealand
-6.649	TacSat-2
-6.649	Search Guard Successor Foundation
-6.650	Trebur
-6.653	Neith (hypothetical moon)
-6.654	Sierra de San Pedro Mártir
-6.654	Chabot Space and Science Center
-6.654	Global Hands-On Universe
-6.657	Daniel S. Schanck Observatory
-6.657	NGC 891
-6.659	E. M. Antoniadi
-6.659	Opus Majus
-6.661	Explorer 11
-6.661	Haute-Provence Observatory
-6.662	Aristarchus (crater)
-6.665	The Koala Brothers
-6.666	Patacamaya
-6.667	Washburn Observatory
-6.671	ʿAbd al‐Wājid
-6.671	Laser guide star
-6.674	HAT-P-6
-6.677	Giuseppe Conzo's Observatory
-6.678	Museum Boerhaave
-6.680	Albert Graham Ingalls
-6.681	Paul Henry and Prosper Henry
-6.682	Edwin Taylor Pollock
-6.682	Catherine Coleman
-6.687	XO Telescope
-6.688	Jaume Nomen
-6.689	Sullam al-sama'
-6.689	Orion Molecular Cloud Complex
-6.689	Active optics
-6.690	World of Goo
-6.690	Manastash Ridge Observatory
-6.693	Mister Rogers' Neighborhood (season 22)
-6.693	Mister Rogers' Neighborhood (season 30)
-6.693	Christoph Scheiner
-6.695	HD 209458
-6.695	X-ray telescope
-6.695	John E. Mellish
-6.699	Mount Keira
-6.699	Ibn al-Adami
-6.700	Doc McStuffins
-6.700	Atlas Coelestis
-6.701	Sierra de San Pedro Mártir National Park
-6.702	List of museums and collections at the University of Michigan
-6.704	Bruneau Dunes State Park
-6.706	Galaxy Zoo
-6.706	Technopoly
-6.707	Leonard Digges (scientist)
-6.714	Carl August von Steinheil
-6.715	Ibn al-Saffar
-6.717	Ibn al-Kammad
-6.718	Solar eclipses on Jupiter
-6.718	Shadow square
-6.719	Tachymeter (survey)
-6.722	Queen Mary University of London
-6.722	Neutrino astronomy
-6.722	GRB 080319B
-6.722	Abū al‐ʿUqūl
-6.722	Al-Adami
-6.726	COROT-3
-6.728	Fuzzy concept
-6.729	IRC+10420
-6.731	Caltech Submillimeter Observatory
-6.731	AARNet
-6.734	Celestron
-6.734	HD 10647
-6.736	Remote Telescope Markup Language
-6.736	California Nebula
-6.737	V1429 Aquilae
-6.737	ESPRESSO
-6.740	Solar Sentinels
-6.740	Astronomical acronyms
-6.744	Polar alignment
-6.745	Music Land
-6.746	East-Asian Planet Search Network
-6.747	Early life of Isaac Newton
-6.748	Gemini Planet Imager
-6.748	COROT-2
-6.750	Isaac Newton Telescope
-6.751	Saint Jerome in His Study (after van Eyck)
-6.754	Alvan Clark
-6.756	Parallactic angle
-6.756	Eötvös experiment
-6.757	Judson B. Coit Observatory
-6.758	Giovanni Battista Zupi
-6.765	Wise Observatory
-6.765	United Kingdom Infrared Telescope
-6.767	Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure
-6.768	Pinaleno Mountains
-6.773	Catoptrics
-6.774	Arthur C. Clarke Institute for Modern Technologies
-6.775	NGC 2516
-6.776	Warner and Swasey Observatory
-6.776	Ashover
-6.779	Gliese 758
-6.781	DubaiSat-1
-6.782	NGC 362
-6.782	Mars Exploration Program
-6.783	Timeline of telescopes, observatories, and observing technology
-6.785	Man, Moment, Machine
-6.787	Practical joke device
-6.787	Missile Defense Alarm System
-6.788	NGC 6101
-6.789	Exchange Alley
-6.791	HD 2638
-6.791	NGC 3766
-6.792	Bucks County Council (Boy Scouts of America)
-6.794	Carnarvon, Northern Cape
-6.795	Nicholas U. Mayall Telescope
-6.795	Timeline of materials technology
-6.795	Freaky Stories
-6.796	Scientific demonstration
-6.797	Benjamin Baillaud
-6.803	List of Dutch people
-6.807	Warner & Swasey Company
-6.808	WASP-6
-6.815	Cygnus OB2-12
-6.819	Opera glasses
-6.819	Kosmos 215
-6.820	Zenith telescope
-6.820	HAT-P-7
-6.820	TheSky (astronomy software)
-6.820	The Family-Ness
-6.820	First surface mirror
-6.822	Aperture masking interferometry
-6.822	Instituto de Astrofísica de Andalucía
-6.823	Texas A&M Astronomical Observatory
-6.824	How Do They Do It?
-6.824	Donald in Mathmagic Land
-6.824	List of people considered father or mother of a scientific field
-6.826	Inductivism
-6.827	'Scuse Me While I Miss the Sky
-6.828	Sir Howard Grubb, Parsons and Co
-6.828	Index of optics articles
-6.829	FN Model 30-11
-6.831	Kavli Prize
-6.833	Turbacz
-6.834	Beta Crucis
-6.834	History of rockets
-6.836	André-Louis Danjon
-6.837	Mont-Mégantic National Park
-6.838	Halton Arp
-6.842	The Wind in the Willows (TV series)
-6.846	Magdalena Ridge Observatory
-6.846	Cabeus (crater)
-6.849	Finderscope
-6.849	HD 12661
-6.850	American Astronomical Society 215th meeting
-6.851	Charles Pritchard
-6.853	ANU Research School of Physics and Engineering
-6.854	SN 2006gy
-6.854	Herschel Museum of Astronomy
-6.855	List of cities in Grenada
-6.862	Life on Other Planets
-6.862	Dennis di Cicco
-6.863	Giuseppe Biancani
-6.864	ARO 12m Radio Telescope
-6.865	HAT-P-11
-6.867	Jeffrey A. Hoffman
-6.867	Giovanni Demisiani
-6.868	List of Pawn Stars episodes
-6.869	The Short Reign of Pippin IV
-6.870	John M. Grunsfeld
-6.870	Galileo (1975 film)
-6.871	Hobby-Eberly Telescope
-6.878	List of experiments
-6.881	Nancy J. Currie
-6.882	Nicolas Fuss
-6.884	Great Moon Hoax
-6.885	Discovery One
-6.888	List of astronomy acronyms
-6.889	Jeffrey S. Medkeff
-6.890	St Gregory's College, Campbelltown
-6.890	WIYN Observatory
-6.890	Segmented mirror
-6.892	Wolter telescope
-6.892	Terence Dickinson
-6.893	News from the New World Discovered in the Moon
-6.894	Nibiru Sociedad Astronomica
-6.894	Jean Mueller
-6.894	Gottfried Kirch
-6.896	Chi Cygni
-6.896	Štefánik's Observatory
-6.900	Museo della Scienza e della Tecnologia "Leonardo da Vinci"
-6.902	Oak Ridge Observatory
-6.903	Francesco de Vico
-6.903	GRW +70 8247
-6.909	György Kepes
-6.909	Nordic Optical Telescope
-6.910	UK Schmidt Telescope
-6.911	Flying bridge
-6.913	Martin van den Hove
-6.913	Pises Observatory
-6.915	DAMP Project
-6.917	HD 65216
-6.918	T-mount
-6.922	Ladd Observatory
-6.922	Binbō Shimai Monogatari
-6.922	1600s (decade)
-6.923	Federico Cesi
-6.926	Leander J. McCormick
-6.926	Eta Ophiuchi
-6.933	Institut de radioastronomie millimétrique
-6.936	Bushnell Corporation
-6.938	James Lick
-6.938	Andromeda I
-6.940	Comet seeker
-6.940	Parfocal lens
-6.940	Seismic noise
-6.942	List of largest optical telescopes in the 20th century
-6.943	Slooh
-6.944	Agent of Byzantium
-6.945	HD 158633
-6.946	HD 114386
-6.947	GSC 03549-02811
-6.949	Airborne observatory
-6.951	Hartmann mask
-6.951	Cape Neddick Light
-6.953	Le Grand Macabre
-6.953	RC Optical Systems
-6.953	Maria Mitchell Association
-6.955	HD 187123
-6.956	Yogi Bear and the Magical Flight of the Spruce Goose
-6.957	Heinrich Göbel
-6.957	Sherburne Wesley Burnham
-6.958	French ship Pourquoi Pas? (2005)
-6.959	WIYN Consortium
-6.960	Graphometer
-6.961	Barlow lens
-6.962	GSC 02652-01324
-6.964	Abbe–Koenig prism
-6.970	Oil Region Astronomical Observatory
-6.970	Centre de recherches en géodynamique et astrométrie
-6.972	Wootton, Kent
-6.975	Adrien Auzout
-6.976	Giovanni Faber
-6.978	Diffuse interstellar band
-6.978	Sanduleak -69° 202
-6.978	Mu Draconis
-6.981	Dynameter
-6.982	Francesco Manca
-6.988	Boller and Chivens
-6.988	Eye relief
-6.990	Homebuilt machines
-6.991	1610s
-6.992	Franz von Gruithuisen
-6.992	Ormsby M. Mitchel
-6.995	Visby lenses
-6.996	Bart of Darkness
-6.996	Arthur B. C. Walker, Jr.
-6.997	Isaac Newton Group of Telescopes
-7.000	Stardome Observatory
-7.002	Mark R. Showalter
-7.006	Telescopio Nazionale Galileo
-7.007	Ivan Kulibin
-7.007	Science in the Age of Enlightenment
-7.007	Hermann Carl Vogel
-7.008	Super-LOTIS
-7.009	Ball State University Observatory
-7.011	Frank Elmore Ross
-7.011	EPICS
-7.014	Heavens-Above
-7.016	Space selfie
-7.019	Víctor M. Blanco Telescope
-7.019	Sunward Aerospace Group
-7.019	Tacheometry
-7.021	K Puppis
-7.021	QI (F series)
-7.024	Step in Time
-7.025	Kyoto Tower
-7.026	Warning from Space
-7.029	Another Time, Another Place (Space: 1999)
-7.030	Innocenzo Manzetti
-7.031	Carter Observatory
-7.032	Byurakan Observatory
-7.032	Vassar College Observatory
-7.033	Toruń Centre for Astronomy
-7.034	Clock drive
-7.036	Mont Mégantic
-7.036	Social development theory
-7.037	Far Ultraviolet Camera/Spectrograph
-7.038	James Lick telescope
-7.038	Telescope (disambiguation)
-7.039	Ulriken
-7.044	HD 149026
-7.047	Nelson Monument, Edinburgh
-7.048	Laurent Cassegrain
-7.048	Guru Shikhar
-7.049	Conjugate focal plane
-7.053	Las Cumbres Observatory Global Telescope Network
-7.054	Aviation in Hawaii
-7.056	Johann Baptist Cysat
-7.060	Carey mask
-7.060	Galileo's Daughter
-7.060	Sherzer Observatory
-7.060	GRB 090423
-7.063	HD 121504
-7.064	HD 102117
-7.068	Bahtinov mask
-7.069	Nik Szymanek
-7.069	The Barefoot Executive
-7.070	2005 in science
-7.070	Minolta AF 500mm Reflex lens
-7.071	Transit
-7.071	Teide 1
-7.072	May 2007
-7.072	Lyman-break galaxy
-7.073	Vallis Alpes
-7.074	Stretham Old Engine
-7.076	R. F. Joyce Observatory
-7.077	Reflecting instrument
-7.077	Optical Mechanics, Inc.
-7.078	SkyWeek
-7.078	Dawes' limit
-7.080	Mare Erythraeum
-7.081	Telescopefish
-7.084	Wilfred Mott
-7.092	Star diagonal
-7.094	BOOTES
-7.096	14 Herculis b
-7.098	Sodium layer
-7.099	Condenser
-7.099	Lord Eliot Convention
-7.100	Schöpfl
-7.101	Bosscha Observatory
-7.105	Barnard Observatory
-7.105	COROT-1
-7.105	William Harkness
-7.111	Arakkal Museum
-7.113	Dibner Institute for the History of Science and Technology
-7.116	Armagh Planetarium
-7.117	Personal equation
-7.117	Conical pendulum
-7.117	Charles L. Veach
-7.121	Lord John Hay (politician)
-7.122	The Why Why Family
-7.126	Lists of British inventions
-7.128	Galileo (song)
-7.129	Great Diamond
-7.129	PLate OPtimizer
-7.130	Cloverleaf quasar
-7.131	John Birmingham (astronomer)
-7.132	Equatorial room
-7.136	Kodaikanal Solar Observatory
-7.137	Quantum Quest: A Cassini Space Odyssey
-7.137	Serrurier truss
-7.139	Daniel Schwenter
-7.139	Taipei First Girls' High School
-7.140	Golden Arrow (car)
-7.140	Aden Meinel
-7.140	Discovery Channel Telescope
-7.141	RTMC Astronomy Expo
-7.143	Gornergrat Infrared Telescope
-7.147	George W. Hayward
-7.147	Macropsia
-7.150	Coded aperture
-7.150	Langrenus (crater)
-7.151	Cinetheodolite
-7.153	Vainu Bappu Observatory
-7.154	Christoph Grienberger
-7.155	HD 50554
-7.156	Füxa
-7.157	Givatayim Observatory
-7.158	(15810) 1994 JR1
-7.160	Table of historic and prehistoric climate indicators
-7.162	Henri L'Estrange
-7.162	Joseph Bancroft Reade
-7.162	Starfire Optical Range
-7.163	Frank in the River
-7.167	Virtual observatory
-7.169	HD 155358
-7.171	List of gardener-botanist explorers of the Enlightenment
-7.171	Magnetogram
-7.172	Robert Stirling Newall
-7.173	Paulding Light
-7.173	Timeline of Bhutanese history
-7.175	Powell Observatory
-7.180	Hero Hotline
-7.182	HD 164922
-7.183	Henrik Mohn
-7.183	List of highest astronomical observatories
-7.184	Walter Frederick Gale
-7.184	Wingspan (magazine)
-7.185	Mirage of astronomical objects
-7.185	List of Desert Island Discs episodes (2001–10)
-7.186	XO-3
-7.187	Timeline of telescope technology
-7.188	Orion Telescopes & Binoculars
-7.188	List of Desert Island Discs episodes (1981–90)
-7.189	HD 88133
-7.191	Larry Fleinhardt
-7.192	Confederation of Indian Amateur Astronomers
-7.194	William Samson
-7.194	List of Desert Island Discs episodes (1951–60)
-7.195	Society for Popular Astronomy
-7.196	HD 160529
-7.196	Teylers astronomical observatory
-7.197	John August Anderson
-7.199	List of Desert Island Discs episodes (1971–80)
-7.199	List of Desert Island Discs episodes (2011–present)
-7.199	Vixen (telescopes)
-7.199	BLAST (telescope)
-7.200	Another Night (song)
-7.201	James Short (mathematician)
-7.202	Clavius (crater)
-7.204	Sternwarte Mirasteilas
-7.205	Science Center of Pinellas County
-7.205	Amici roof prism
-7.206	Loch Garten
-7.208	Out of the Ordinary Festival
-7.212	Johann Zahn
-7.212	Modified Dall–Kirkham telescope
-7.213	List of National Inventors Hall of Fame inductees
-7.215	HD 50064
-7.215	Richard Sheepshanks
-7.216	Lurie–Houghton telescope
-7.219	Timeline of Solar System astronomy
-7.220	Lockyer Observatory and Planetarium
-7.220	List of Modern Marvels episodes
-7.220	Iso-Heikkilä Observatory
-7.221	Scientific wager
-7.226	Astronomische Vereinigung Kärntens
-7.226	Ilan Ramon youth physics center
-7.229	Erect image
-7.230	Erygmascope
-7.230	HD 168625
-7.231	Rough Science
-7.231	Magnetograph
-7.231	Theodore Haak
-7.231	The Pod People
-7.232	2MASS J0523-1403
-7.239	Telecompressor
-7.239	Helen Bottel
-7.240	Dutch Open Telescope
-7.241	James Clark (businessman)
-7.241	Galilaei (lunar crater)
-7.241	Probing Lensing Anomalies Network
-7.243	Onizuka Center for International Astronomy
-7.245	Baby Boom Galaxy
-7.245	Rainwater Observatory and Planetarium
-7.246	Jack-in-the-Box (Astro City)
-7.247	P. Devadas
-7.248	Circinus Galaxy
-7.250	Jacob Leupold
-7.253	A Bug's Life (video game)
-7.256	Astronomical filter
-7.257	Chew (comics)
-7.258	William A. Bradfield
-7.258	1964 in science
-7.258	Miscellaneous Symbols And Pictographs
-7.259	Harry Edwin Wood
-7.260	Waterfront Park (Seattle)
-7.264	Irish Astronomical Society
-7.265	Popov Castle
-7.269	HAT-P-1b
-7.269	Holcomb Observatory and Planetarium
-7.270	Ryo Kawasaki
-7.270	Ciudad de las Ideas (conference)
-7.271	Delaware AeroSpace Education Foundation
-7.271	List of 2 Days & 1 Night episodes
-7.273	Astronomical optical interferometry
-7.274	C/2008 T2 (Cardinal)
-7.274	Jahrtausendturm
-7.274	Otto Struve Telescope
-7.274	NGC 7686
-7.276	Nasal sebum
-7.278	Tara Seibel
-7.282	This Can't Be Happening at Macdonald Hall
-7.282	Lúpin
-7.283	Examination of Apollo Moon photographs
-7.284	John Daggett Hooker
-7.284	Gregorian Tower
-7.285	List of things named after James Clerk Maxwell
-7.285	Musée des Lunettes et Lorgnettes Pierre Marly
-7.286	Stabilized Automatic Bomb Sight
-7.286	Ravenscrag, Montreal
-7.287	39382 Opportunity
-7.289	FireWire camera
-7.289	HD 63454
-7.290	Bear Branch Nature Center
-7.291	Macroscope (novel)
-7.294	Joseph Jackson Lister
-7.294	HD 168607
-7.294	Alvan Graham Clark
-7.294	Background (astronomy)
-7.300	Star transit
-7.300	Antiques Roadshow, Series 28 (2005–06)
-7.301	400 Years of the Telescope
-7.302	Norman Sperling
-7.302	Burrell Memorial Observatory
-7.304	Robert Howlett
-7.305	Tasco
-7.307	List of largest optical telescopes in the continental United States
-7.308	Scope (disambiguation)
-7.308	National Virtual Observatory
-7.308	37452 Spirit
-7.310	Hawera Observatory
-7.310	Desmond Paul Henry
-7.310	Colombo University Observatory
-7.311	Anatopism
-7.313	Frank John Kerr
-7.313	List of largest optical telescopes in the 18th century
-7.314	Scientific equipment optician
-7.315	Italian Astronomical Archives Center
-7.316	Francesco Fontana
-7.317	Aristoteles (crater)
-7.319	Henry Hindley
-7.320	KU Observatory
-7.321	Interplanetary Scintillation Array
-7.322	Japanese words of Dutch origin
-7.325	Gnomon of Saint-Sulpice
-7.327	The Ghost of Slumber Mountain
-7.328	Viewing instrument
-7.329	Bayfordbury Observatory
-7.329	Arzachel (crater)
-7.331	Friedrich Simon Archenhold
-7.333	Camp Madawaska
-7.334	HD 114762
-7.335	Calculating God
-7.335	NGC 1049
-7.336	V598 Puppis
-7.336	Arthur Stanley Williams
-7.337	Gregg Thompson (astronomer)
-7.337	Samuel Klingenstierna
-7.337	List of Ohio Wesleyan University buildings
-7.338	History of photographic lens design
-7.342	Petavius (crater)
-7.344	Dimitar Sasselov
-7.344	Regional Planetary Image Facility
-7.346	Albert L. Hopkins
-7.346	Observational history of comets
-7.346	Eliza Wilbur
-7.348	Crane Observatory
-7.348	1612
-7.348	Siding Spring 2.3 m Telescope
-7.351	John Carter (Royal Navy officer)
-7.355	Image-stabilized binoculars
-7.356	List of largest optical telescopes in the 19th century
-7.357	Thrice Upon a Time
-7.358	Ben Wolfe
-7.358	Maria Mitchell Observatory
-7.359	SN 2010lt
-7.359	The Magnetic Telescope
-7.360	The Two Princesses of Bamarre
-7.361	Mount Wilson Toll Road
-7.361	List of large optical telescopes
-7.362	The Science Factory
-7.363	FLUKA
-7.364	1608
-7.364	Shadow of Fear
-7.364	Guide star
-7.370	Lookout Studio
-7.372	Portland Observatory
-7.376	Kusumoto Ine
-7.376	Far-Seer
-7.378	Devil's Punchbowl (California)
-7.378	FITS Liberator
-7.379	Sommers–Bausch Observatory
-7.380	Astronomy Day
-7.380	Wildlife viewing
-7.381	The Thief (1996 novel)
-7.381	Weaver Student Observatory
-7.383	Anton Thraen
-7.383	Abolfadl Harawi
-7.383	Milagro (experiment)
-7.385	Bandora Gang
-7.386	Astronomical Observatory of Lisbon
-7.387	Stratoscope
-7.390	Wilder Observatory
-7.390	George N. Saegmuller
-7.391	All Sky Automated Survey
-7.391	1948 in the United States
-7.392	Jerry Nelson (astronomer)
-7.393	William Simms (instrument maker)
-7.394	Frederick James Hargreaves
-7.395	List of Desert Island Discs episodes (1991–2000)
-7.397	List of Desert Island Discs episodes (1961–70)
-7.397	Sky-Watcher
-7.398	List of Rees's Cyclopædia articles
-7.401	Mannheim Observatory
-7.401	NCI Froward Point
-7.403	Copilia
-7.404	Thomas Cooke (machinist)
-7.408	Tom Johnson (astronomer)
-7.409	XO-2 (star)
-7.410	Wendelstein (mountain)
-7.410	1609
-7.410	Vortex coronagraph
-7.411	1611
-7.413	Titchwell Marsh
-7.415	Ralph A. Worley Observatory
-7.415	Vega–Bray Observatory
-7.416	Governor Aker Observatory
-7.416	Mercator Telescope
-7.416	Type 72 non-metallic anti-tank mine
-7.420	International Astronomical Youth Camp
-7.420	TAROT-South robotic observatory
-7.421	Green Bank Interferometer
-7.421	NGC 6217
-7.422	Spyglass
-7.424	List of In Our Time programmes
-7.425	She Builds Quick Machines
-7.425	Khagol Vishwa
-7.425	NGC 6362
-7.426	NGC 6304
-7.426	Plate scale
-7.427	Vilém Gajdušek
-7.428	List of How It's Made episodes
-7.429	NGC 6118
-7.429	1887 in art
-7.432	Mungo Mackay
-7.434	Astronomical Institute of Slovak Academy of Sciences
-7.435	Veen Observatory
-7.437	Sproul Observatory
-7.438	Really Big Things
-7.441	Tower viewer
-7.444	Mad as a Mars Hare
-7.445	Fabio Colonna
-7.446	Spin casting (mirrors)
-7.448	WASP-7
-7.450	Astronomical Society of South Australia
-7.450	The Black Rose (novel)
-7.455	Patronage in astronomy
-7.458	31338 Lipperhey
-7.460	1610 in science
-7.461	HIPAS Observatory
-7.467	Herbert Matayoshi
-7.467	1615
-7.469	William Miller Sperry Observatory
-7.469	Optical Museum Jena
-7.475	Tethered formation flying
-7.476	OTA
-7.477	Antarctic Submillimeter Telescope and Remote Observatory
-7.482	1680 in science
-7.483	Boswell Observatory
-7.484	Geraint F. Lewis
-7.484	Things of Science
-7.484	Atmosphere and Telescope Simulator
-7.488	XO-3b
-7.493	15276 Diebel
-7.495	XO-5
-7.495	XO-4
-7.496	BSA Ultra
-7.497	Rutherfurd Observatory
-7.497	Golden age of physics
-7.497	AS 314
-7.498	Roux family (marine painters)
-7.499	Land of Doom
-7.503	15779 Scottroberts
-7.503	Viper telescope
-7.504	Praise of the Two Lands (ship)
-7.504	Karl Wilhelm Valentiner
-7.505	Project Galileo
-7.507	Index of physics articles (T)
-7.508	Jacques-Barthélemy Micheli du Crest
-7.513	Caroline Moore
-7.514	Occulting disk
-7.515	NGC 1404
-7.518	Manuel Dias (Yang MaNuo)
-7.523	Cedric Allingham
-7.524	Banknotes of the Commercial Bank of Newfoundland
-7.524	HAT-P-3
-7.525	IC 4665
-7.526	History of Slough
-7.526	Giacomo Badoer
-7.530	NGC 4550
-7.530	Gamma Crateris
-7.533	Nathaniel Pigott
-7.533	Pisa University System
-7.533	CoRoT-7d
-7.535	1845 in science
-7.538	Sufi Observing Competition
-7.540	Heinrich Erfle
-7.541	HD 330075
-7.541	Giulio Cesare la Galla
-7.542	1590 in science
-7.543	Spatial cutoff frequency
-7.544	1804 in art
-7.546	Lake Afton Public Observatory
-7.551	DFM Engineering
-7.554	Fast Fourier Transform Telescope
-7.555	Gary Klein (inventor)
-7.556	Glen D. Riley Observatory
-7.557	Photon sieve
-7.558	Nizam al-Din Nishapuri
-7.561	Clayton Cramer
-7.563	Roscoe Frank Sanford
-7.566	Graphic telescope
-7.567	Livermore Optical Transient Imaging System
-7.568	NGC 4651
-7.570	Bradford Robotic Telescope
-7.570	Cherenkov Array at Themis
-7.571	1729 in science
-7.572	Joan Roget
-7.572	NGC 4654
-7.572	1697 in science
-7.573	Matteo Campani-Alimenis
-7.576	Orion Optics
-7.576	Herrett Observatory
-7.576	Macalester College Observatory
-7.576	Rogers Observatory
-7.577	1615 in science
-7.579	1628 in science
-7.583	Arjen Roelofs
-7.585	Optical mount
-7.585	Infinite-axis telescope
-7.585	John Browning (scientific instrument maker)
-7.586	Hiram College Library
-7.586	Jonah David Mann
-7.586	Mohawk Valley Astronomical Society
-7.589	George Dollond
-7.590	1621 in science
-7.591	Halfmann Teleskoptechnik
-7.593	1612 in science
-7.595	1609 in science
-7.595	MySky
-7.597	Bradstreet Observatory
-7.598	Bernard Lyot Telescope
-7.598	Marie Byles
-7.599	1608 in science
-7.600	North Norfolk Coast Site of Special Scientific Interest
-7.603	Mark Thompson (astronomer)
-7.604	Big, Bigger, Biggest
-7.604	1834 in South Africa
-7.604	Sonoma State Observatory
-7.605	Vector magnetograph
-7.606	1611 in science
-7.609	Fremont Peak Observatory
-7.610	W Mensae
-7.612	Tpoint
-7.616	Darling's Observatory
-7.619	Felix Ziegel
-7.621	Officina Stellare
-7.623	Andreas Gerasimos Michalitsianos
-7.629	NGC 2899
-7.631	Optical System for Imaging and low Resolution Integrated Spectroscopy
-7.634	June 2005 in science
-7.634	Jamais Je Ne T'oublierai
-7.635	August 2005 in science
-7.645	HD 231701
-7.645	Kayser-Threde
-7.647	Dew shield
-7.648	Balloon-borne telescope
-7.648	Small telescope
-7.650	Pfund telescope
-7.650	Celestial observation
-7.652	Jackson Building (Asheville, North Carolina)
-7.652	Hubble Origins Probe
-7.654	John Coventry (constructor of philosophical instruments)
-7.654	Cincinnatus Shryock
-7.656	Fulgenzio Micanzio
-7.664	Weihrauch HW55
-7.667	Rolnick Observatory
-7.672	Suzhou Synta Optical Technology
-7.677	Killarney Provincial Park Observatory
-7.680	Scioptric ball
-7.686	Explore Scientific
-7.687	Peter Quinn (astronomer)
-7.694	Oliver Observing Station
-7.695	John Diebel
-7.698	Edwin P. Martz
-7.705	Optofluidics
-7.705	Hidden Valley Observatory
-7.706	What the Tudors Did for Us
-7.706	Brooks Astronomical Observatory
-7.708	Westerhout 31
-7.722	HD 168746
-7.723	NGC 4976
-7.725	HD 4208
-7.725	University of Oklahoma Observatory
-7.726	The Continuing Revolution
-7.732	Cophasing
-7.734	Brooks Observatory
-7.735	Vedh Shala
-7.735	Annette Ferguson
-7.736	Shams al-Din al-Khafri
-7.736	James Simms
-7.737	Warner Observatory
-7.737	Coon Creek Science Center
-7.739	Hobbs Observatory
-7.739	Wilhelm F. Rabe
-7.742	Amasa Holcomb
-7.742	List of observations of solar and lunar transits of unknown objects
-7.742	Cathetometer
-7.743	Bradley Observatory
-7.744	Buddy's Circus
-7.745	Automated Patrol Telescope
-7.745	Tomcat Combat
-7.748	Korea Advanced Institute of Science and Technology Satellite 4
-7.755	5953 Shelton
-7.757	Mountain Skies Observatory
-7.757	Mary Helen Wright Greuter
-7.762	William Kitchiner
-7.765	Now You See It, Now You Don't: Part One
-7.765	William Spencer (navigational instrument maker)
-7.774	Maria Clara Eimmart
-7.774	HD 130322
-7.777	HD 118203
-7.777	Buddy of the Legion
-7.777	Bagrat Ioannisiani
-7.782	Charles Frank Ltd
-7.786	Galactocentrism
-7.786	2012 GX17
-7.790	Dual speed focuser
-7.792	John Mills (entrepreneur)
-7.794	Singapore Omni-Theatre
-7.795	Cater Rand
-7.795	Colonial American Astronomy
-7.796	Ohana project
-7.798	Apollo Observatory
-7.799	IC 2149
-7.803	Time smearing
-7.816	July 1964
-7.816	Creighton University Observatory
-7.816	William Higginson
-7.819	Mel Bartels
-7.820	History of surveillance
-7.824	Far 3 kpc Arm
-7.827	Brow Monument and Brow Monument Trail
-7.828	Spencer, Browning & Rust
-7.834	Baker Observatory
-7.834	Bucknell Observatory
-7.834	Celestial Observatory
-7.834	Clarke Observatory
-7.834	Daniel Scholl Observatory
-7.834	Grant O. Gale Observatory
-7.834	Howell Observatory
-7.834	Jack C. Davis Observatory
-7.834	Weitkamp Observatory
-7.835	Orange County Astronomers
-7.837	Spidernaut
-7.852	Donna (crater)
-7.853	2010 MJ72
-7.853	Astronomical Center of Shumen University
-7.853	Astronomy in central India
-7.853	Eyeglass Cirque
-7.853	Mantis Elite
-7.853	Multiple Satellite Imaging
-7.853	OpTIIX
-7.853	Scientific Leadership
-7.853	Shosanbetsu observatory
-7.853	Slooh Radio
-7.853	Stalker vision