List of largest optical telescopes historically

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People flock to the new David Dunlap Observatory in the 1930s, the second largest reflecting telescope in the world a going by a mirror diameter of 74 inches (about 1.9 meters) at that time.

Telescopes have grown in size since they first appeared around 1608. The following tables list the increase in size over the years. Different technologies can and have been used to build telescopes, which are used to magnify distant views especially in astronomy.

By overall aperture[]

The following is a list of largest single mount optical telescopes sorted by total objective diameter (aperture), including segmented and multi-mirror configurations. It is a historical list, with the instruments listed in chronological succession by objective size. By itself, the diameter of the primary optics can be a poor measure of a telescope's historical or scientific significance; for example, William Parsons, 3rd Earl of Rosse's 72-inch (1.8 m) reflecting telescope did not perform as well (i.e. gather as much light) as the smaller silvered glass mirror telescopes that succeeded it because of the poor performance of its speculum metal mirror.

Optical Telescopes (List by Overall Aperture)
Name Aperture Type Built by Location Year
Meter Inch
Gran Telescopio Canarias (GTC) 10.4 m 409″ Reflector – Segmented,36 Spain (90%), Mexico, USA ORM, La Palma, Canary Islands, Spain 2009
Keck 1 10 m 394″ Reflector – Segmented,36 USA Mauna Kea Observatory, Hawaii 1993
BTA-6 6 m 238″ Reflector Soviet Union Zelenchukskaya, Caucasus 1976
Hale Telescope 5.08 m 200″ Reflector USA Palomar Observatory, California 1948
Hooker Telescope 2.54 m 100″ Reflector USA Mt. Wilson Observatory; California 1917
Leviathan of Parsonstown 1.83 m 72″ Reflector – metal mirror William Parsons Birr Castle; Ireland 1845
Herschel's 40-foot telescope [1] 1.26 m 49.5″ Reflector – metal mirror William Herschel Observatory House; England 1789–1815
John Michell's Gregorian reflector [2] 75 cm 29.5″ Reflector - Gregorian John Michell Yorkshire, Great Britain 1780–1789
Father Noel's Gregorian reflector [2] 60 cm 23.5″ Reflector – Gregorian Father Noel Paris, France 1761
James Short's Gregorian reflector 50 cm 19.5" Reflector – Gregorian James Short Great Britain 1750
James Short's Gregorian reflector 38 cm 14″ Reflector – Gregorian James Short Great Britain 1734
Christiaan Huygens 210 foot refractor   22 cm 8.5" Refractor – Aerial telescope Christiaan Huygens Netherlands 1686
Christiaan Huygens 170 foot refractor 20 cm 8" Refractor – Aerial telescope Christiaan Huygens Netherlands 1686
Christiaan Huygens 210 foot refractor 19 cm 7.5" Refractor – Aerial telescope Christiaan Huygens Netherlands 1686
Hooke's reflector [3] 18 cm 7″ Reflector Robert Hooke Great Britain 16??
Hevelius refractor 12 cm 4.7″ Refractor Johannes Hevelius Gdańsk, Poland 1645
Hevelius Scheiner's helioscope 6 cm 2.3″ Refractor Johannes Hevelius Gdańsk, Poland 1638
Galileo's 1620 telescope [4] 3.8 cm 1.5″ Refractor Galileo Galilei Italy 1620
Galileo's 1612 telescope [4] 2.6 cm 1″ Refractor Galileo Galilei Italy 1612
Galileo's 1609 telescope [4] 1.5 cm .62″ Refractor Galileo Galilei Italy 1609
Hans Lippershey's telescope ? cm .?″ Refractor Hans Lippershey Middelburg, the Netherlands 1608

By historical significance[]

Chronological list of optical telescopes by historical significance, which reflects the overall technological progression and not only the primary mirror's diameter (as shown in table above).

Optical Telescopes (List by Historical Significance)
Name Aperture Type Significance Location Year
Meter Inch
Gran Telescopio Canarias (GTC) 10.4 m 409″ Reflector – Segmented,36 World's largest 2009 ORM, La Palma, Canary Islands, Spain 2009
Large Binocular Telescope (LBT) 8.4 m x 2
(22.8 m LBTI)[5]
464.5″ glass mirror reflector – Multi-mirror (2) World's largest 2008 with Beam Combiner Mount Graham International Observatory, Arizona
Hobby-Eberly Telescope 9.2 m 362″ Reflector – Segmented,91 First HET McDonald Observatory, USA 1997
Keck 1 10 m 394″ Reflector – Segmented,36 World's largest 1993 Mauna Kea Observatory, Hawaii 1993
Hubble (HST) 2.4 m 94″ glass mirror reflector Largest Visible-light space based telescope Low Earth orbit NASA+ESA 1990
BTA-6 6 m 238″ glass mirror reflector World's largest 1976 Zelenchukskaya, Caucasus 1976
McMath-Pierce Solar Telescope 1.61 m 63″ glass mirror reflector Largest solar telescope Kitt Peak National Obs., USA 1962
Hale Telescope (200 inch) 5.08 m 200″ glass mirror reflector World's largest 1948 Palomar Observatory, California 1948
Samuel Oschin telescope 1.22 m 48″ glass mirror reflector – Schmidt camera World's largest Schmidt camera 1948 Palomar Observatory; California 1948
George Ritchey 40-inch (1 m)[6] 102 cm 40″ glass mirror reflector First large Ritchey-Chrétien Flagstaff, Arizona (Washington, D.C. until 1955) 1934
Plaskett telescope[7] 1.83 m 72″ glass mirror reflector designed as world's largest but beaten by the 100-inch Hooker telescope Dominion Astrophysical Observatory, Canada 1918
Hooker Telescope 2.54 m 100″ glass mirror reflector World's largest 1917 Mt. Wilson Observatory; California 1917
Hale 60-Inch Telescope 1.524 m 60″ glass mirror reflector the first of the "modern" large research reflectors, designed and located for precision imaging.[8][9] Mt. Wilson Observatory; California 1908
Great Paris Exhibition Telescope of 1900 125 cm 49.21" refractor – achromat largest refractor ever built, scrapped after Exhibition. Exposition Universelle (1900) 1900–1901
A.A. Common's 60-inch Ealing reflector[10] 1.524 m 60″ glass mirror reflector World's largest glass mirror reflector 1889, sold to Harvard 1904, moved to South Africa 1920s (Boyden Observatory) where it was largest telescope in the southern hemisphere. Ealing, Harvard College Observatory, Boyden Observatory 1889
Yerkes Refractor 102 cm 40″ refractor – achromat largest operational refractor Yerkes Observatory, USA 1897
A.A. Common's 36 inch Ealing reflector 91.4 cm 36″ glass mirror reflector First to prove fainter than naked eye astrophotography,[11] sold, became Crossley Reflector A.A. Common Reflector, Britain / Lick Observatory, USA 1879
Great Melbourne Telescope[12] 1.22 m 48″ speculum metal mirror reflector Last large reflector with a speculum metal mirror, world's largest equatorially mounted telescope for several decades.[13] Melbourne Observatory, Australia 1868–1889
William Lassell 48-inch[14] 1.22 m 48″ speculum metal mirror reflector Malta 1861–1865
Rosse telescope: Leviathan of Parsonstown 1.83 m 72″ metal – speculum metal mirror reflector World's largest 1845 Birr Castle; Ireland 1845–1908
William Lassell 24-inch[15] 61 cm 24″ speculum metal mirror reflector Liverpool, England 1845
Great Dorpat Refractor (Fraunhofer)
Dorpat/Tartu Observatory		 24 cm 9.6″ refractor – achromat "..the first modern, achromatic, refracting telescope."[16][17] Dorpat, Governorate of Estonia 1824
Rosse 36-inch Telescope 91.4 cm 36″ speculum metal mirror reflector Birr Castle; Ireland 1826
Herschel 40-foot (126 cm d.)[1] 1.26 m 49.5″ speculum metal mirror reflector World's largest 1789 Observatory House; England 1789–1815
Herschel 20-foot (47.5 cm d.)[18][19] 47.5 cm 18.5″ speculum metal mirror reflector Observatory House; England 1782
Rev John Michell's Gregorian reflector[2] 75 cm 29.5″ speculum metal mirror – Gregorian reflector World's largest 1780 Yorkshire, Great Britain 1780–1789
Dollond Apochromatic Triplet[20] 9.53 cm 3.75″ Refractor – apochromat First apochromatic triplet England 1763[20]
Father Noel's Gregorian reflector[2] 60 cm 23.5″ speculum metal mirror – Gregorian reflector World's largest 1761 Paris, France 1761
James Short's Gregorian reflector 50 cm 19.5" speculum metal mirror – Gregorian reflector World's largest 1750 Great Britain 1750
James Short's Gregorian reflector 38 cm 14″ speculum metal mirror – Gregorian reflector World's largest 1734 Great Britain 1734
Chester Moore Hall's Doublet[21] 6.4 cm 2.5" Refractor – achromat First achromatic doublet Great Britain 1733
Hadley's Reflector[22] 15 cm 6″ speculum metal mirror reflector First parabolic newtonian Great Britain 1721
Christiaan Huygens 210 foot refractor 22 cm 8.5" Refractor – Aerial telescope World's largest 1686 Netherlands 1686
Christiaan Huygens 170 foot refractor 20 cm 8" Refractor – Aerial telescope World's largest 1689 Netherlands 1686
Christiaan Huygens 210 foot refractor 19 cm 7.5" Refractor – Aerial telescope World's largest 1686 Netherlands 1686
Hooke's reflector[3] 18 cm 7″ speculum metal mirror – Gregorian reflector First Gregorian Great Britain 1674[23]
Newton's Reflector[24] 3.3 cm 1.3″ speculum metal mirror reflector First reflecting telescope England (mobile) 1668
Hevelius refractor 12 cm 4.7″ Refractor World's largest 1645 Gdańsk (Danzig), Poland 1645
Hevelius Scheiner's helioscope 6 cm 2.3″ Refractor World's largest 1638 & First Equatorial[21] Gdańsk (Danzig), Poland 1638
Galileo's 1620 telescope 3.8 cm[4] 1.5″ Refractor World's largest 1638 Italy 1638
Galileo's 1612 telescope 2.6 cm[4] 1″ Refractor World's largest 1612 Italy 1612
Galileo's 1609 telescope 1.5 cm[4] .62″ Refractor World's largest 1609 Italy 1609
Hans Lippershey's telescope ? cm .?″ Refractor World's first recorded telescope Netherlands 1608
Legend

  Segmented Mirror (Mosaic) Glass Reflector
  Glass Reflector (Metal coating on glass mirror)
  Reflector (Metal mirror)
  Refractor (Lens) or other

See also[]

References[]

  1. ^ Jump up to: a b "Original mirror for William Herschel's 40 foot telescope, 1785". Science & Society Picture Library. Retrieved 22 November 2008.
  2. ^ Jump up to: a b c d Henry C. King (1955). The History of the Telescope. Courier Corporation. p. 91. ISBN 978-0-486-43265-6.
  3. ^ Jump up to: a b Henry C. King (1955). The History of the Telescope. Courier Corporation. p. 77. ISBN 978-0-486-43265-6.
  4. ^ Jump up to: a b c d e f Note: Diameter of cardboard objective stop Dupré, S. (2003). "Galileo's telescope and celestial light SAO/NASA Astrophysics Data System (ADS)". Journal for the History of Astronomy. 34 (Part 4, No. 117): 369–399. Bibcode:2003JHA....34..369D. ISSN 0021-8286.
  5. ^ "Archived copy". Archived from the original on 2011-07-25. Retrieved 2013-07-24.CS1 maint: archived copy as title (link)
  6. ^ http://www.spaceref.com/news/viewpr.html?pid=17931
  7. ^ "Archived copy". Archived from the original on 2009-02-09. Retrieved 2010-01-10.CS1 maint: archived copy as title (link)
  8. ^ "mwoa.org – Observing with the 60-inch Telescope at Mount Wilson". Archived from the original on 2011-08-07. Retrieved 2011-08-07.
  9. ^ mtwilson.edu-Building the 60-inch Telescope Article by Mike Simmons written in 1984 (and updated in 2008) for the Mount Wilson Observatory Association Archived 2013-08-05 at the Wayback Machine
  10. ^ New York Times "NEW HARVARD TELESCOPE.; Sixty-Inch Reflector, Biggest in the World, Being Set Up. "April 6, 1905, Thursday Page 9
  11. ^ http://www.ucolick.org/public/telescopes/crossley.html
  12. ^ http://stjarnhimlen.se/bigtel/LargestTelescope.html
  13. ^ sciencephoto.com, Great Melbourne Telescope, Casting a telescope mirror, 1866
  14. ^ http://www.mikeoates.org/lassell/lassell_by_a_chapman.htm
  15. ^ http://www.mikeoates.org/lassell/telescope.htm
  16. ^ Fraunhofer and the Great Dorpat Refractor, Waaland, J. Robert, American Journal of Physics, Volume 35, Issue 4, pp. 344–350 (1967)
  17. ^ http://www.obs.ee/obs/instrumendid/fr.htm
  18. ^ http://www.maa.clell.de/Messier/E/Xtra/Bios/wherschel.html
  19. ^ http://www.nasm.si.edu/exhibitions/gal111/universe/etu_a_herschel.htm
  20. ^ Jump up to: a b http://articles.adsabs.harvard.edu/full/gif/1948PA.....56...75K/0000083.000.html Title: The invention and early development of the achromatic telescope, Authors: King, H. C., Journal: Popular Astronomy, Vol. 56, p.75, Bibliographic Code: 1948PA.....56...75K, Page 83
  21. ^ Jump up to: a b Paul Schlyter, Largest optical telescopes of the world
  22. ^ http://amazing-space.stsci.edu/resources/explorations//groundup/lesson/scopes/hadley/index.php
  23. ^ Gérard René Lemaitre (2008). Astronomical Optics and Elasticity Theory: Active Optics Methods. Springer Science & Business Media. p. 17. ISBN 978-3-540-68905-8.
  24. ^ A. Rupert Hall (1996). Isaac Newton: Adventurer in Thought. Cambridge University Press. p. 67. ISBN 978-0-521-56669-8.

External links[]

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