List of largest optical telescopes in the 19th century
id:
list-of-largest-optical-telescopes-in-the-19th-century-280-1264646
title:
List of largest optical telescopes in the 19th century
text:
This list of largest optical telescopes in the 19th century includes what were large optical telescopes for their time. See List of largest optical telescopes in the 20th century for later telescopes. The list includes various refractors and reflectors that were active at some time between about 1799 to 1901. The main material used early on for reflecting telescope mirrors was speculum metal, which reflected only about two-thirds of the incident light, and which tarnished, requiring maintenance.
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/List_of_largest_optical_telescopes_in_the_19th_century
date created:
date modified:
2024-04-11T21:26:53Z
main entity:
{"identifier":"Q6625022","url":"https://www.wikidata.org/entity/Q6625022"}
image:
fields total:
13
integrity:
13