| 词条 | Nicholas U. Mayall Telescope | |||||||||||||||||||||||||||||||
| 释义 |
The Nicholas U. Mayall Telescope, also known as the Mayall 4-meter Telescope, is a four-meter reflector telescope located at the Kitt Peak National Observatory in Arizona and named after Nicholas U. Mayall. It saw first light on February 27, 1973, and was the second-largest telescope in the world at that time.[1] Initial observers included: David Crawford, Nicholas Mayall, and Arthur Hoag.[1] It was dedicated on June 20, 1973 after Mayall's retirement as director.[1] The mirror has an f/2.7 hyperboloidal shape. It is made from a two-foot ({{convert|61|cm|in|sing=on|abbr=on}}) thick fused quartz disk that is supported in an advanced-design mirror cell. The prime focus has a field of view six times larger than that of the Hale reflector. An identical reflector was later built at Cerro Tololo Inter-American Observatory, in Chile.[2] It is host to the Dark Energy Spectroscopic Instrument. Contemporaries on commissioningThe Mayall (4 m) debuted neatly between the Hale (5 m) and Shane (3 m) in the early 1970s. Largest telescopes 1973:
GallerySee also
References1. ^1 2 {{citation | url = http://www.noao.edu/kp50/files/Timeline.pdf | title = Celebrating 50 years; Kitt Peak National Observatory; Milestones at Kitt Peak | last1 = Lindsley | first1 = Dave | last2 = Edmondson | first2 = Frank | last3 = Kiani | first3 = Shiva | date = 2008}} 2. ^{{cite web | url = http://www.accessscience.com/content.aspx?searchStr=Mayall&id=681600 | publisher = AccessScience@McGraw-Hill | author = Robert D. Chapman | author2 = William M. Sinton | title = Telescope | doi = 10.1036/1097-8542.681600}} External links
2 : Astronomical observatories in Arizona|Buildings and structures in Pinal County, Arizona |
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