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The 24-inch (610 mm) Dobsonian telescope brought by the Sidewalk Astronomers was unconventional, because most telescopes at such meetings tended to be smaller, on equatorial mounts, and designed for astrophotography rather than optical viewing. Surprisingly (and controversially at the time) Dobson's telescope tied in first prize for best optics.
A Dobsonian telescope on display at Stellafane in the early 1980s. A Dobsonian telescope is an altazimuth-mounted Newtonian telescope design popularized by John Dobson in 1965 and credited with vastly increasing the size of telescopes available to amateur astronomers. Dobson's telescopes featured a simplified mechanical design that was easy to ...
These are marketed as the ED80 (80 mm or 3-inch (76 mm) objective at f/7.5), ED100 (100mm or 4-inch (100 mm) at f/9) and ED120 (120mm or 4.7-inch (120 mm) at f/7.5). Orion also sold binoculars for astronomical and terrestrial observing, microscopes and monocular spotting scopes of the type used by birdwatchers and marksmen .
Topiary Park is a 9.2-acre (3.7 ha) public park and garden in Columbus, Ohio's Discovery District.The park's topiary garden, officially the Topiary Garden at Old Deaf School Park, is designed to depict figures from Georges Seurat's 1884 painting, A Sunday Afternoon on the Island of La Grande Jatte.
Columbus (/ k ə ˈ l ʌ m b ə s /, kə-LUM-bəs) is the capital and most populous city of the U.S. state of Ohio.With a 2020 census population of 905,748, [10] it is the 14th-most populous city in the U.S., the second-most populous city in the Midwest (after Chicago), and the third-most populous U.S. state capital (after Phoenix, Arizona and Austin, Texas).
Other significant earthquakes in Ohio include: [118] one of magnitude 4.8 near Lima on September 19, 1884; [119] one of magnitude 4.2 near Portsmouth on May 17, 1901; [120] and one of 5.0 in LeRoy Township in Lake County on January 31, 1986, which continued to trigger 13 aftershocks of magnitude 0.5 to 2.4 for two months.
The building's L-shaped land lot covers 25,153 square feet (2,336.8 m 2), extending 200 feet (61 m) northward to 56th Street, [5] with frontage of 150 feet (46 m) along 55th Street and 100 feet (30 m) on 56th Street. [6] [7] City Center abuts the CitySpire office building to the west and 125 West 55th Street to the east.
Francis Albert Sinatra (/ s ɪ ˈ n ɑː t r ə /; December 12, 1915 – May 14, 1998) was an American singer and actor.Nicknamed the "Chairman of the Board" and "Ol' Blue Eyes", he is regarded as one of the most popular entertainers of the 20th century. [2]
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