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- Great_refractor abstract "Great refractor refers to a large telescope with a lens, usually the largest refractor at an observatory with an equatorial mount. The preeminence and success of this style in observational astronomy was an era in telescope use in the 19th and early 20th century. Great refractors were large refracting telescopes using achromatic lenses (as opposed to mirrors). They were often the largest in the world, or largest in a region. Despite typical designs having smaller apertures than reflectors, Great refractors offered a number of advantages and were favored for astronomy.It was not until the 20th century that they were gradually superseded by large reflecting telescopes for professional astronomy. A great refractor was often the centerpiece of a new 19th century observatory, but was typically used with an entourage of other astronomical instruments such as a Meridian Circle, a Heliometer, and Astrograph, and a smaller refractor such as a Comet Seeker or Equatorial. Great refractors were often used for observing double stars and equipped with a Filar micrometer. Numerous discoveries of minor planets, satellites, the planet Neptune, double stars, and pioneering work on astrophotgraphy was done great refractors.".
- Great_refractor thumbnail Refraktor_Wien_Kerschbaum_1.jpg?width=300.
- Great_refractor wikiPageExternalLink 1947MNSSA...6...13S.
- Great_refractor wikiPageExternalLink index.php.
- Great_refractor wikiPageExternalLink books?id=XksAAAAAYAAJ&pg=PA242&img=1&zoom=3&hl=en&sig=ACfU3U3pmkR_--h_9eGA5VawIroj7Uu_ew&ci=85%2C74%2C831%2C781&edge=0.
- Great_refractor wikiPageExternalLink v=onepage&q&f=false.
- Great_refractor wikiPageExternalLink building_large_telescopes_refractors.pdf.
- Great_refractor wikiPageExternalLink photostream.
- Great_refractor wikiPageExternalLink search?tbs=bks%3A1&tbo=1&q=Great+Refractor&btnG=Search+Books.
- Great_refractor wikiPageExternalLink fr.htm.
- Great_refractor wikiPageExternalLink 907054064474153t.
- Great_refractor wikiPageID "23982871".
- Great_refractor wikiPageRevisionID "601800904".
- Great_refractor hasPhotoCollection Great_refractor.
- Great_refractor subject Category:19th_century.
- Great_refractor subject Category:Telescope_types.
- Great_refractor comment "Great refractor refers to a large telescope with a lens, usually the largest refractor at an observatory with an equatorial mount. The preeminence and success of this style in observational astronomy was an era in telescope use in the 19th and early 20th century. Great refractors were large refracting telescopes using achromatic lenses (as opposed to mirrors). They were often the largest in the world, or largest in a region.".
- Great_refractor label "Great refractor".
- Great_refractor label "Großer Refraktor".
- Great_refractor sameAs Großer_Refraktor.
- Great_refractor sameAs m.076vttc.
- Great_refractor sameAs Q1548927.
- Great_refractor sameAs Q1548927.
- Great_refractor wasDerivedFrom Great_refractor?oldid=601800904.
- Great_refractor depiction Refraktor_Wien_Kerschbaum_1.jpg.
- Great_refractor isPrimaryTopicOf Great_refractor.
