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Alvan Clark (July 10, 1832 — June 9, 1897), American Astronomer, scientist, telescope maker | World Biographical Encyclopedia
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Keystone College Observatory founder Professor Tom Cupillari retires after 50 years at college | Times Leader
![Sold at auction Alvan Clark & Sons 4-inch Refractor Telescope Auction Number 3295M Lot Number 403 | Skinner Auctioneers Sold at auction Alvan Clark & Sons 4-inch Refractor Telescope Auction Number 3295M Lot Number 403 | Skinner Auctioneers](https://images.skinnerinc.com/full/758/1239758.jpg)
Sold at auction Alvan Clark & Sons 4-inch Refractor Telescope Auction Number 3295M Lot Number 403 | Skinner Auctioneers
![400-years-of-the-telescope.pdf - 400 Years of the Telescope Transcript Date: Thursday, 26 November 2009 - 12:00AM Location: Museum of London 400 Years | Course Hero 400-years-of-the-telescope.pdf - 400 Years of the Telescope Transcript Date: Thursday, 26 November 2009 - 12:00AM Location: Museum of London 400 Years | Course Hero](https://www.coursehero.com/thumb/d6/82/d682f57778c66bccc1f6ea278fe008423e63bda8_180.jpg)
400-years-of-the-telescope.pdf - 400 Years of the Telescope Transcript Date: Thursday, 26 November 2009 - 12:00AM Location: Museum of London 400 Years | Course Hero
![12 3/8 inch Alvan Clark refractor. It was built in 1926 for Rutherfurd Observatory. It now lives in Columbia, SC. : r/Astronomy 12 3/8 inch Alvan Clark refractor. It was built in 1926 for Rutherfurd Observatory. It now lives in Columbia, SC. : r/Astronomy](https://preview.redd.it/erzkkent1ap21.jpg?auto=webp&s=819a8adc8d7c6818a78154ac242ff532bd11ab3f)