Yerkes Observatory, Williams Bay, WI (May 2024) (Alexandr Zaytsev)

Yerkes Observatory, Williams Bay, WI (May 2024)

Revision title: Main dome of the observatory (27m in diameter), housing the 40" refractor

Half a day visit to the magnificent Yerkes Observatory [1, 2], Williams Bay, WI on May 11, 2024 - the home of the largest refractor in the world still remaining in operational condition (D=40" f/19): the D=102cm doublet lens based 1897 built Clark Refractor, also often referred to simply as the Great Refractor [3-5].

The images taken in the main dome of the observatory on the same visit are also available under [7].

[1] https://yerkesobservatory.org/

[2] https://www.instagram.com/yerkesobservatory/

[3] https://yerkesobservatory.org/science/telescopes.html

[4] http://www.scopeviews.co.uk/YerkesVisit.htm

[5] https://www.grainger.com/know-how/inspiration/kh-video-yerkes-observatory

[6] https://bollerandchivens.com/?page_id=558

[7] https://www.astrobin.com/38ots3/

B

Title: Main dome of the observatory (27m in diameter), housing the 40" refractor

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C

Title: Main entrance

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D

Title: Observatory building (constructed in 1895-1897)

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E

Title: Main observatory dome (in the back) with Molleigh Dome on the loan in the front (added in 2007)

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F

Title: Main observatory dome - view from below / ground level

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G

Title: Main observatory dome with slit opened in a daytime

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H

Title: Main dome as viewed from the observatory grounds

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I

Title: View from the other end of the main observatory building - opposite to the main dome

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J

Title: View to the main observatory building from the vicinity of North East dome

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K

Title: North East dome housing 24" f/3.5 Boller and Chivens Cassegrain telescope (installed in 1964)

Description: Good reference to various models of Boller and Chivens Cassegrain telescopes and their location is given in [6]:

[6] https://bollerandchivens.com/?page_id=558

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L

Title: South East dome housing 40" Ritchey-Chretien telescope (constructed and installed in 1967-1968)

Description: (Often referred to as "41-inch" of Yerkes observatory, to avoid confusion with 40" refractor.)

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