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  2. Niels Diffrient - Wikipedia

    en.wikipedia.org/wiki/Niels_Diffrient

    The Freedom chair has patented synchronous arms, which adjust simultaneously. [12] [13] The headrest tilts forward as the sitter reclines, keeping the head in an upright position. [14] Liberty Chair, 2004: Humanscale’s other notable task chair is its Liberty chair, also designed by Niels Diffrient, which was introduced in 2004.

  3. Swivel chair - Wikipedia

    en.wikipedia.org/wiki/Swivel_chair

    Office swivel chairs, like computer chairs, usually incorporate a gas lift to adjust the height of the seat, but not usually large (e.g. recliner) swiveling armchairs. A draughtsman's chair is a swivel chair without wheels that is usually taller than an 'office chair' for use in front of a drawing board. They also have a foot-ring to support ...

  4. Space elevator - Wikipedia

    en.wikipedia.org/wiki/Space_elevator

    The concept of a Tsiolkovsky tower combined with a classic space elevator cable (reaching above the level of GEO) has been suggested. [6] Other ideas use very tall compressive towers to reduce the demands on launch vehicles. [97] The vehicle is "elevated" up the tower, which may extend as high as above the atmosphere, and is launched from the ...

  5. List of tallest structures in the United States by height

    en.wikipedia.org/wiki/List_of_tallest_structures...

    WWRR Renda Tower Kingsland, Georgia: Guyed Mast 496 m QueenB Television Tower La Crosse, Wisconsin: Guyed Mast 496 m KDEB Tower: Fordland, Missouri: Guyed Mast 495 m WGME TV Tower: Raymond, Maine: Guyed Mast 495.9 m WPSD-TV Tower: Kevil, Kentucky: Guyed Mast 495.6 m NVG-Amarillo Tower Amarillo, Texas: Guyed Mast 493.5 m Sinclair Television ...

  6. Astronomy Tower of the Sorbonne - Wikipedia

    en.wikipedia.org/wiki/Astronomy_Tower_of_the...

    The Astronomy Tower of the Sorbonne is a tower at the Sorbonne University's Paris campus built to house an astronomical observatory for its students. The structure was erected during the reconstruction of the Sorbonne, between 1885 and 1901. [1] The tower is 39 meters high, has an upper and lower dome, and includes several rooms.

  7. Institute of Astronomy, Cambridge - Wikipedia

    en.wikipedia.org/wiki/Institute_of_Astronomy...

    Institute of Astronomy Observatory Building, housing the library. The Institute of Astronomy (IoA) is the largest of the three astronomy departments in the University of Cambridge, and one of the largest astronomy sites in the United Kingdom. Around 180 academics, postdocs, visitors and assistant staff work at the department.

  8. Messier 29 - Wikipedia

    en.wikipedia.org/wiki/Messier_29

    Messier 29 or M29, also known as NGC 6913 or the Cooling Tower Cluster, is a quite small, bright open cluster of stars just south of the central bright star Gamma Cygni of a northerly zone of the sky, Cygnus. It was discovered by Charles Messier in 1764, and can be seen from Earth by using binoculars.

  9. Rundetaarn - Wikipedia

    en.wikipedia.org/wiki/Rundetaarn

    The Round Tower (Danish: Rundetårn) is a 17th-century tower in Copenhagen, Denmark, one of the many architectural projects of Christian IV. Built as an astronomical observatory , it is noted for its equestrian staircase , a 7.5-turn helical corridor leading to the platform at the top (34.8 meters above ground), and its views over Copenhagen.

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