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  2. Mount Wilson Observatory - Wikipedia

    en.wikipedia.org/wiki/Mount_Wilson_Observatory

    The 100-inch Hooker telescope at Mt Wilson fundamentally changed the scientific view of the Universe Hooker Telescope enclosure The 100-inch (2.5 m) Hooker telescope located at Mount Wilson Observatory , California, was completed in 1917, and was the world's largest telescope until 1949.

  3. Mount Wilson (California) - Wikipedia

    en.wikipedia.org/wiki/Mount_Wilson_(California)

    It is the location of the Mount Wilson Observatory, which is an important astronomical facility in Southern California with historic 60-inch (1,524 mm) and 100-inch (2,540 mm) aperture telescopes, and 60-foot (18.3 m) and 150-foot (45.7 m) tall solar towers.

  4. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    A ruler, depicting two customary units of length, the centimeter and the inch. A unit of length refers to any arbitrarily chosen and accepted reference standard for measurement of length. The most common units in modern use are the metric units, used in every country globally. In the United States the U.S. customary units are also in use.

  5. Hale Telescope - Wikipedia

    en.wikipedia.org/wiki/Hale_Telescope

    The Hale Telescope is a 200-inch (5.1 m), f / 3.3 reflecting telescope at the Palomar Observatory in San Diego County, California, US, named after astronomer George Ellery Hale. With funding from the Rockefeller Foundation in 1928, he orchestrated the planning, design, and construction of the observatory, but with the project ending up taking ...

  6. Mount Rushmore - Wikipedia

    en.wikipedia.org/wiki/Mount_Rushmore

    This is an accepted version of this page This is the latest accepted revision, reviewed on 9 December 2024. Mountain in the United States featuring a sculpture of four presidents For the band, see Mount Rushmore (band). Mount Rushmore National Memorial Shrine of Democracy Tȟuŋkášila Šákpe Mount Rushmore features Gutzon Borglum's sculpted heads of George Washington, Thomas Jefferson ...

  7. George Willis Ritchey - Wikipedia

    en.wikipedia.org/wiki/George_Willis_Ritchey

    He played a major role in designing the mountings and making the mirrors of the Mt. Wilson 60-inch (1.5 m) and 100-inch (2.5 m) telescopes. Hale and Ritchey had a falling-out in 1919, and Ritchey eventually went to Paris where he promoted the construction of very large telescopes.

  8. Palomar Observatory - Wikipedia

    en.wikipedia.org/wiki/Palomar_Observatory

    Astronomer George Ellery Hale, whose vision created Palomar Observatory, built the world's largest telescope four times in succession. [8] He published a 1928 article proposing what was to become the 200-inch Palomar reflector; it was an invitation to the American public to learn about how large telescopes could help answer questions relating to the fundamental nature of the universe.

  9. Lick Observatory - Wikipedia

    en.wikipedia.org/wiki/Lick_Observatory

    Lick Observatory is the world's first permanently occupied mountain-top observatory. [1] The observatory, in a Classical Revival style structure, was constructed between 1876 and 1887, from a bequest from James Lick of $700,000, equivalent to $23,737,778 in 2023.