Refracting telescope (English Wikipedia)

Tromp, R.M. (December 2015). "An adjustable electron achromat for cathode lens microscopy". Ultramicroscopy. 159: 497–502. doi:10.1016/j.ultramic.2015.03.001. PMID 25825026.
English, Neil (2011). "The Refracting Telescope: A Brief History". Choosing and Using a Refracting Telescope. Patrick Moore's Practical Astronomy Series. pp. 3–20. doi:10.1007/978-1-4419-6403-8_1. ISBN 978-1-4419-6402-1.
English, Neil (2011). "The Refracting Telescope: A Brief History". Choosing and Using a Refracting Telescope. Patrick Moore's Practical Astronomy Series. pp. 3–20. doi:10.1007/978-1-4419-6403-8_1. ISBN 978-1-4419-6402-1.
Lequeux, James (2013). "The Observatory: At Last!". Le Verrier—Magnificent and Detestable Astronomer. Astrophysics and Space Science Library. Vol. 397. pp. 77–125. doi:10.1007/978-1-4614-5565-3_4. ISBN 978-1-4614-5564-6.
Vasiljević, Darko (2002), "The Cooke triplet optimizations", in Vasiljević, Darko (ed.), Classical and Evolutionary Algorithms in the Optimization of Optical Systems, Springer US, pp. 187–211, doi:10.1007/978-1-4615-1051-2_13, ISBN 9781461510512
Campbell, W. W. (December 1918). "The Beginning of the Astronomical Day". Publications of the Astronomical Society of the Pacific. 30 (178): 358. Bibcode:1918PASP...30..358C. doi:10.1086/122784.
Hall, A. (January 1878). "Observations of the Satellites of Mars". Astronomische Nachrichten. 91 (1): 11–14. doi:10.1002/asna.18780910103.
Barnard, E. E. (12 October 1892). "Discovery and observations of a fifth satellite to Jupiter". The Astronomical Journal. 12 (11): 81–85. Bibcode:1892AJ.....12...81B. doi:10.1086/101715.

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Bell, Louis (1922). The Telescope. New York: McGraw-Hill – via The Project Gutenberg.

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Astronomical Observations, Made at the Royal Observatory at Greenwich, in the year 1838. Clarendon Press. 1840. hdl:2027/njp.32101074839562.^{[page needed]}

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"John Wall refractor | Hanwell Community Observatory". Archived from the original on 21 May 2014. Retrieved 10 July 2020.

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King, H. C. (January 1949). "The optical work of Charles Tulley". Popular Astronomy. 57: 74. Bibcode:1949PA.....57...74K.
Hollis, H. P. (June 1914). "Large telescopes". The Observatory. 37: 245–252. Bibcode:1914Obs....37..245H.
Campbell, W. W. (December 1918). "The Beginning of the Astronomical Day". Publications of the Astronomical Society of the Pacific. 30 (178): 358. Bibcode:1918PASP...30..358C. doi:10.1086/122784.
"Notes". The Observatory. 1: 181–185. September 1877. Bibcode:1877Obs.....1..181.
Morley, T. A. (February 1989). "A catalogue of ground-based astrometric observations of the Martian satellites, 1877-1982". Astronomy and Astrophysics Supplement Series. 77 (2): 209–226. Bibcode:1989A&AS...77..209M.
Barnard, E. E. (12 October 1892). "Discovery and observations of a fifth satellite to Jupiter". The Astronomical Journal. 12 (11): 81–85. Bibcode:1892AJ.....12...81B. doi:10.1086/101715.

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brunelleschi.imss.fi.it

"Galileo's telescope - The instrument". Museo Galileo: Institute and Museum of the History of Science. 2008. Retrieved 27 September 2020.
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Ferguson, Kitty (20 March 2014). "The Glassmaker Who Sparked Astrophysics". Nautilus. Retrieved 26 October 2019.

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"The 26-inch "Great Equatorial" Refractor". United States Naval Observatory. Archived from the original on 22 March 2018. Retrieved 29 October 2018.

nih.gov (Global: 4^th place; English: 4^th place)

pubmed.ncbi.nlm.nih.gov

Tromp, R.M. (December 2015). "An adjustable electron achromat for cathode lens microscopy". Ultramicroscopy. 159: 497–502. doi:10.1016/j.ultramic.2015.03.001. PMID 25825026.

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Science, Lauren Cox 2017-12-21T03:30:00Z; Astronomy. "Who Invented the Telescope?". Space.com. Retrieved 26 October 2019.{{cite web}}: CS1 maint: numeric names: authors list (link)

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"Starizona's Guide to CCD Imaging". Starizona.com. Archived from the original on 17 October 2013. Retrieved 17 October 2013.

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"Telescope: Naval Observatory 26-inch Refractor". amazing-space.stsci.edu. Retrieved 29 October 2018.

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"Telescope Calculations". Northern Stars. Archived from the original on 19 November 2019. Retrieved 20 December 2013.
"Starizona's Guide to CCD Imaging". Starizona.com. Archived from the original on 17 October 2013. Retrieved 17 October 2013.
"Voyager". astronautix.com. Archived from the original on 11 September 2016.
"Lifting Titan's Veil" (PDF). Cambridge. p. 4. Archived from the original (PDF) on 22 February 2005.
"Titan". Astronomy Picture of the Day. NASA. Archived from the original on 27 March 2005.
"The 26-inch "Great Equatorial" Refractor". United States Naval Observatory. Archived from the original on 22 March 2018. Retrieved 29 October 2018.
"John Wall refractor | Hanwell Community Observatory". Archived from the original on 21 May 2014. Retrieved 10 July 2020.

Refracting telescope (English Wikipedia)

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rmg.co.uk (Global: 6,890^th place; English: 4,892^nd place)

si.edu (Global: 340^th place; English: 295^th place)

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