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Brashear telescope

WebAug 6, 2007 · Brass was so abundant in the early 1900's that it was considered a junk metal. Many items like transits and scientific items got painted to make them look more expensive. Unitron nickel plated all the … WebApr 3, 2012 · The basement Brashear brass tube was originally painted black which was removed during restoration. The rest of the telescope looks original. We've been trying to discover more information or pictures …

Chabot Space and Science Center - Wikipedia

The original observatory building was replaced by the current structure, shown in the photograph above. It was designed in the Classic Revival style by Thorsten E. Billquist. The cornerstone was laid in 1900, and the new structure was completed in 1912. It is located four miles north of downtown Pittsburgh, Pennsylvania, at Riverview Park. The building is a tan brick and white terra cotta hilltop temple whose Classical forms and decoration symbolize the unity of art and science… Brashear was born in Brownsville, Pennsylvania, a town 35 miles (56 km) south of Pittsburgh along the Monongahela River. His father, Basil Brown Brashear, was a saddler, and his mother, Julia Smith Brashear, was a school teacher. He was the oldest of seven children. As a boy, John Brashear was heavily influenced … See more John Alfred Brashear (November 24, 1840 – April 8, 1920) was an American astronomer and instrument builder. See more • In 1902, he was elected as a member of the American Philosophical Society. • He was awarded the Elliott Cresson Medal of The Franklin Institute in 1910. • The Brashear Association was founded in 1916 in his memory. See more • "The Unexpected Hero of Light," Initial Condition podcast, Episode 9 • Works by or about John Brashear at Internet Archive • "John A. Brashear" History Cover Page • "Uncle John" Brashear See more • List of astronomical instrument makers • Chabot Space & Science Center, Oakland, California See more • Brashear, John A., Edited by W. Lucian Scaife (1925). John A. Brashear, Autobiography of A Man Who Loved the Stars. … See more ohio department of the american legion https://techmatepro.com

Brashear, John Alfred Encyclopedia.com

WebBrashear himself designed and constructed the thirty-inch Thaw Memorial Refractor, which was installed in 1914. Used for photographic astrometry, which precisely measures the … WebMaker - Warner & Swasey / John Brashear, 1914 Aperture – 20 inches Focal Length – 28 feet (8.5 m) Mount – German equatorial Cost – $20,000 Usage Intent – popular and educational use, formerly used for … WebThis telescope has a 4-inch aperture achromatic objective, a 54-inch brass tube, a nickel-plated finder scope, a wooden tripod, and a cast-iron equatorial mount of the so-called … ohio department of transportation flickr

John A Brashear Telescope / the Tous Brashear - Cloudy Nights

Category:Historic Brashear telescope saved for restoration in NZ Dark Sky ...

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Brashear telescope

Sale Pending … Brashear 3.5” with rare Helioscope Option

WebMay 12, 2011 · The Novack Telescope - This is a 6" Brashear in remarkably good shape. The objective lens is outstanding; no fungus, no scratches of any kind. The lens cell is also in perfect shape and all collimation screws turn easily. Focal length is about 90" or f/15. The original postage-stamp lens spacers (used by Brashear) are still in place. WebAmong Brashear’s astronomical contributions were an improved and soon widely used process for silvering glass mirrors; the concave metal mirrors on which Henry A. Rowland ruled diffraction gratings; spectroscopes for use with the large refractors at the Allegheny, Lick, Princeton, and Yerkes observatories; George Ellery Hale ’s first …

Brashear telescope

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WebThe John A. Brashear House and Factory in the Perry South neighborhood of Pittsburgh, Pennsylvania, was built in 1886. ... Made from brass and roughly the size of a dictionary, the box was later opened by a member of the Antique Telescope Society, noting that the contents included plans and blueprints of Brashear's factory, a photograph of ... WebJan 28, 2013 · Brashear made a number of objectives of the flint forward type that Hasting designed. You have to be careful that sometime in the past the elements weren't flipped around so the crown is now facing the sky which as you know is …

WebMay 14, 2015 · Lowell redoubled his mathematical efforts by incorporating the latest technology, including a Millionaire calculating machine that is still on display at Lowell Observatory. He also borrowed a... WebTelescope Description John A. Brashear first came to public attention with an 1879 advertisement for silvered-glass specula and an 1882 catalog, Silvered Glass Reflecting …

WebMay 5, 2024 · The lens is a Brashear (now L3) SR 150 lens. Focal length 150" - 3810 mm Aperture 15.4" - 391 mm. This is a Cassegrain-type lens. The lenses are installed on an … WebJun 9, 2004 · The sheer diversity of Brashear's offerings is what is most amazing, not just the giant refractors that the Clarks were known for (Brashear's largest was 30", and still in use today), but giant reflectors, the world's finest diffraction gratings, rock salt prisms, and a lifetime of community service and volunteer work.

WebA cratera satélite Brashear P fica a sul-sudoeste. Esta formação é uma cratera muito desgastada com características que foram quase completamente desgastadas pelos impactos subsequentes. Conectada à borda sul desta cratera, há uma série de vales e crateras de impacto que levam algumas centenas de quilômetros para o leste. Crateras ...

WebGTC · Keck · Subaru. HET · LBT · VLT. SALT · Gemini (N) · Gemini (S) This list of the largest optical reflecting telescopes with objective diameters of 3.0 metres (120 in) or greater is sorted by aperture, which is a measure of the light-gathering power and resolution of a reflecting telescope. The mirrors themselves can be larger than ... ohio department of taxesWebAug 15, 2024 · This telescope, located at the Chabot Space & Science Center in Oakland, California, is the largest refractor in the western U.S. regularly open to the public. Mike … my healthy plate in malayWebAstronomer, Educator, and Maker of Telescopes and Precise Scientific Instruments Dr. John A. Brashear (1840 to 1920) From the position of a millwright in a steel mill on Pittsburgh's South Side, with little formal education, John A. Brashear became one of the most successful producers of telescopes and precision scientific ohio department of transportation leadershipWebBrashear was a self-taught optician whose service to astronomy began in 1876 when he began to make astronomical telescopes. Over the years of his active career Brashear not only made both of the larger telescopes used at the Allegheny Observatory, but came to be recognized as one of the best telescope makers of his day. ohio department of transportation ashlandWebBrashear telescope and test range tracking mounts and systems integrate precision optical tracking with accurate positioning systems. Brashear range integration capabilities … ohio department of taxation unclaimed fundsWebThe John Brashear Company was established in 1881 and the Goerz Optical Company in 1905. The descendant companies of these two pioneers were purchased in 1974 by a Swiss corporation, Contraves A.G., and united to form Contraves Goerz Corporation. Its name later changed to Contraves Inc. ohio department of tax refund statusWebApr 27, 2008 · Despite its age and lack of recent restoration, the telescope is a spectacular piece of machinery, with mechanical parts that exude class and quality. There is a mechanical clock drive that has an electronic … ohio department of tax phone number