The Carnegie telescope (i.e. Carnegie double astrograph) is a twin 20-inch (510 mm) refractor telescope located at Lick Observatory in California, United States. The double telescope's construction began in the 1930s with a grant from the Carnegie institution, although it was not completed until the 1960s when a second lens was added. The telescope is not designed for visual observation, rather it has two lenses used for taking photographs for a specific wavelength recorded on a film emulsion. It was used for photographic sky surveys in the late 20th century, which were successfully completed.
The double telescope is on a precision equatorial mount.[1]
It was designed for astrophotographic surveys, and two noted results were the Shane-Wirtanen galaxy counts and the Lick Northern Proper Motion project.[4]
The Carnegie 20-inch (510 mm) twin refractor is located in a mid-sized dome at the observatory. Because the Carnegie is actually two 20-inch (510 mm) telescopes, side by side on a single mount, it looks more like a large set of very long binoculars rather than a telescope. One side is designed to photograph blue light and the other yellow light.
The Carnegie was built expressly to measure the motions of as many stars as possible in our local area of the Milky Way. Called the Lick Proper Motion Survey, the Carnegie's mission was to photograph the entire night sky twice; once in the 1950s and again 20 years later. By comparing both sets of photographs, much was learned about the motion of stars and the structure of our galaxy. The Carnegie is not used today except when photographs of a wide area of the sky are needed.
The telescope was built by Warner & Swasey according to a design by Doctor F.E. Ross.[5]
The second lens was not installed until 1962, and was corrected for yellow light.[6] The second lens was manufactured by Perkin-Elmer.[6] This lens has four elements, including two crown elements and two flint elements.[7] The clear aperture of the first element surface is 21.5 inches and the entire lens weighs 820 pounds including all four elements.[8] (The clear aperture of the entrance pupil is 20 inches)[9]
^ abShane, C. D. (1947). "1947PASP...59..182S Page 182". Publications of the Astronomical Society of the Pacific. 59 (349): 182. Bibcode:1947PASP...59..182S. doi:10.1086/125941.
^Vasilevskis, S. (1964). "The New 20-Inch Ross-Perkin-Elmer Lens of Lick Observatory". Publications of the Astronomical Society of the Pacific. 76 (448): 14. Bibcode:1964PASP...76...14V. doi:10.1086/128038.
^"Mt. Hamilton Telescopes: Carnegie Double Astrograph". www.ucolick.org. Retrieved 2019-10-22.
^Shane, C. D. (1947). "1947PASP...59..182S Page 182". Publications of the Astronomical Society of the Pacific. 59 (349): 182. Bibcode:1947PASP...59..182S. doi:10.1086/125941.
^ abObservatory, Lick (1965). Contributions from the Lick Observatory. Lick Observatory.
^Vasilevskis, S. (1964). "The New 20-Inch Ross-Perkin-Elmer Lens of Lick Observatory". Publications of the Astronomical Society of the Pacific. 76 (448): 14. Bibcode:1964PASP...76...14V. doi:10.1086/128038.
^Vasilevskis, S. (1964). "The New 20-Inch Ross-Perkin-Elmer Lens of Lick Observatory". Publications of the Astronomical Society of the Pacific. 76 (448): 14. Bibcode:1964PASP...76...14V. doi:10.1086/128038.
^Vasilevskis, S. (1964). "The New 20-Inch Ross-Perkin-Elmer Lens of Lick Observatory". Publications of the Astronomical Society of the Pacific. 76 (448): 14. Bibcode:1964PASP...76...14V. doi:10.1086/128038.
carnegie, telescope, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, februa. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Carnegie telescope news newspapers books scholar JSTOR February 2009 Learn how and when to remove this template message The Carnegie telescope i e Carnegie double astrograph is a twin 20 inch 510 mm refractor telescope located at Lick Observatory in California United States The double telescope s construction began in the 1930s with a grant from the Carnegie institution although it was not completed until the 1960s when a second lens was added The telescope is not designed for visual observation rather it has two lenses used for taking photographs for a specific wavelength recorded on a film emulsion It was used for photographic sky surveys in the late 20th century which were successfully completed Carnegie telescopeCarnegie telescope domeAlternative namesCarnegie Double AstrographPart ofLick Observatory Location s Santa Clara County CaliforniaCoordinates37 20 33 N 121 38 17 W 37 34261585 N 121 63803349 W 37 34261585 121 63803349Telescope stylereflecting telescopedouble telescope Number of telescopes2 Diameter20 in 0 51 m Websitewww wbr ucolick wbr org wbr public wbr telescopes wbr astrograph wbr html 20https wbr www wbr ucolick wbr org wbr main wbr science wbr telescopes wbr carnegie wbr htmlLocation of Carnegie telescope Related media on Commons edit on Wikidata The overall goal of the telescope was to study the problem of galactic rotation and proper motion 1 Contents 1 History 2 Description 3 See also 4 References 5 External linksHistory EditThe first survey was conducted between 1947 and 1954 using the blue light corrected lens which was installed in 1946 2 Lenses 3 Ross Fecker lens added in 1946 Corrected for blue light Perkin Elmer lens added in 1962 Corrected for yellow light four elementsDescription EditThe double telescope is on a precision equatorial mount 1 It was designed for astrophotographic surveys and two noted results were the Shane Wirtanen galaxy counts and the Lick Northern Proper Motion project 4 The Carnegie 20 inch 510 mm twin refractor is located in a mid sized dome at the observatory Because the Carnegie is actually two 20 inch 510 mm telescopes side by side on a single mount it looks more like a large set of very long binoculars rather than a telescope One side is designed to photograph blue light and the other yellow light The Carnegie was built expressly to measure the motions of as many stars as possible in our local area of the Milky Way Called the Lick Proper Motion Survey the Carnegie s mission was to photograph the entire night sky twice once in the 1950s and again 20 years later By comparing both sets of photographs much was learned about the motion of stars and the structure of our galaxy The Carnegie is not used today except when photographs of a wide area of the sky are needed The telescope was built by Warner amp Swasey according to a design by Doctor F E Ross 5 The second lens was not installed until 1962 and was corrected for yellow light 6 The second lens was manufactured by Perkin Elmer 6 This lens has four elements including two crown elements and two flint elements 7 The clear aperture of the first element surface is 21 5 inches and the entire lens weighs 820 pounds including all four elements 8 The clear aperture of the entrance pupil is 20 inches 9 See also EditList of observatoriesReferences Edit a b Shane C D 1947 1947PASP 59 182S Page 182 Publications of the Astronomical Society of the Pacific 59 349 182 Bibcode 1947PASP 59 182S doi 10 1086 125941 Vasilevsk 1963 THENEW20 INCHROSS PERKIN ELMERLENSOFLICKOBSERVATORY Vasilevskis S 1964 The New 20 Inch Ross Perkin Elmer Lens of Lick Observatory Publications of the Astronomical Society of the Pacific 76 448 14 Bibcode 1964PASP 76 14V doi 10 1086 128038 Mt Hamilton Telescopes Carnegie Double Astrograph www ucolick org Retrieved 2019 10 22 Shane C D 1947 1947PASP 59 182S Page 182 Publications of the Astronomical Society of the Pacific 59 349 182 Bibcode 1947PASP 59 182S doi 10 1086 125941 a b Observatory Lick 1965 Contributions from the Lick Observatory Lick Observatory Vasilevskis S 1964 The New 20 Inch Ross Perkin Elmer Lens of Lick Observatory Publications of the Astronomical Society of the Pacific 76 448 14 Bibcode 1964PASP 76 14V doi 10 1086 128038 Vasilevskis S 1964 The New 20 Inch Ross Perkin Elmer Lens of Lick Observatory Publications of the Astronomical Society of the Pacific 76 448 14 Bibcode 1964PASP 76 14V doi 10 1086 128038 Vasilevskis S 1964 The New 20 Inch Ross Perkin Elmer Lens of Lick Observatory Publications of the Astronomical Society of the Pacific 76 448 14 Bibcode 1964PASP 76 14V doi 10 1086 128038 External links EditThe Lick Observatory Carnegie Double AstrographPortals California Astronomy Stars Spaceflight Outer space Solar System Education Science Retrieved from https en wikipedia org w index php title Carnegie telescope amp oldid 1170446675, wikipedia, wiki, book, books, library,
