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  2. Yerkes Observatory - Wikipedia

    en.wikipedia.org/wiki/Yerkes_Observatory

    Yerkes Observatory (/ ˈ j ɜːr k iː z / ⓘ YUR-keez) is an astronomical observatory located in Williams Bay, Wisconsin, United States. The observatory was operated by the University of Chicago Department of Astronomy and Astrophysics [ 2 ] [ 3 ] from its founding in 1897 until 2018.

  3. Ferries of San Francisco Bay - Wikipedia

    en.wikipedia.org/wiki/Ferries_of_San_Francisco_Bay

    Central Pacific ferry El Capitan was the largest ferry on San Francisco Bay when built in 1868. [5] Ferry Berkeley (served 1898–1958) at the San Diego Maritime Museum. The first railroad ferries on San Francisco Bay were established by the San Francisco and Oakland Railroad and the San Francisco and Alameda Railroad (SF&A), which were taken over by the Central Pacific Railroad (CPRR) in 1870 ...

  4. 1909 in science - Wikipedia

    en.wikipedia.org/wiki/1909_in_science

    August 20 – Dwarf planet Pluto is photographed for the first time, at the Yerkes Observatory in Williams Bay, Wisconsin, U.S., 21 years before being identified. [1] Comet Halley first becomes visible on a photographic plate.

  5. George Ellery Hale - Wikipedia

    en.wikipedia.org/wiki/George_Ellery_Hale

    George Ellery Hale (June 29, 1868 – February 21, 1938) was an American astrophysicist, best known for his discovery of magnetic fields in sunspots, and as the leader or key figure in the planning or construction of several world-leading telescopes; namely, the 40-inch refracting telescope at Yerkes Observatory, 60-inch Hale reflecting telescope at Mount Wilson Observatory, 100-inch Hooker ...

  6. Tests of general relativity - Wikipedia

    en.wikipedia.org/wiki/Tests_of_general_relativity

    Tests of general relativity serve to establish observational evidence for the theory of general relativity.The first three tests, proposed by Albert Einstein in 1915, concerned the "anomalous" precession of the perihelion of Mercury, the bending of light in gravitational fields, and the gravitational redshift.

  7. World's first hydrogen-powered commercial ferry set to ... - AOL

    www.aol.com/news/worlds-first-hydrogen-powered...

    The world’s first hydrogen-powered commercial passenger ferry will start operating on San Francisco Bay as part of plans to phase out diesel-powered vessels and reduce planet-warming carbon ...

  8. Key System Mole - Wikipedia

    en.wikipedia.org/wiki/Key_System_Mole

    The Key System Mole was an interurban train and ferry pier on the San Francisco Bay. It served as an interchange point in the East Bay for Key System passengers traveling to and from San Francisco. It opened to passenger service in 1903 and was upgraded several times until 1933 when it was partially destroyed by a fire.

  9. Hydrogen-powered ferry prepares to launch in San Francisco Bay

    www.aol.com/news/hydrogen-powered-ferry-prepares...

    Aptly named Sea Change, the 70-foot, 75-passenger ferry will service multiple stops along San Francisco's waterfront. Hydrogen-powered ferry prepares to launch in San Francisco Bay Skip to main ...