page_title: Chabot Space and Science Center
section_title: Telescopes
hierarchical_section_title: Chabot Space and Science Center / Telescopes
caption_attribution_description: English: Chabot Space &amp; Science Center's 1883, 8-inch, Alvan Clark refracting telescope, Leah
context_page_description: Chabot Space and Science Center, located in Oakland, California, is a center for science learning featuring interactive exhibits, planetariums, a large screen theater, hands-on activities and three powerful telescopes.
  The Center is the continuation and expansion of a public observatory that has served San Francisco Bay Area schools and citizens with astronomy and science education programs since 1883. It is named after the father of hydraulic mining and benefactor of the original Oakland Observatory, Anthony Chabot. Since 2000, the Center has been located on the western border of Redwoods Regional Park.
context_section_description: Chabot Space and Science Center has three observatory telescopes, all of which are open to the public on weekends.
  "Leah" is an 8" refractor telescope built in 1883 by Alvan Clark & Sons and donated by Anthony Chabot. 
  "Rachel" is a 20" refractor telescope, commissioned in 1914 from Warner & Swasey, with optics by John Brashear. It is the largest refractor in the western United States regularly open to the public.
  "Nellie" is a 36" Cassegrain reflector telescope which opened in August 2003, housed in a rolling roof observatory. The primary mirror was donated by Lawrence Livermore National Laboratory and figured and polished by Rayleigh Optical Corporation. Control systems and mount drives were purchased from DFM Engineering.
caption: Chabot's 8-inch (200 mm) refractor telescope, Leah.
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