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  2. French cleat - Wikipedia

    en.wikipedia.org/wiki/French_cleat

    French cleat on a wall (left) and correspondingly on a shelf to be hung up (right) A French cleat is a way of securing a cabinet , mirror, tools, artwork or other objects to a wall. [ 1 ] It is a molding with a 45 degree slope used to hang cabinets or other objects.

  3. Corrective Optics Space Telescope Axial Replacement

    en.wikipedia.org/wiki/Corrective_Optics_Space...

    One potential option was to insert corrective optics, lenses or mirrors in the telescope tube between the primary mirror and the secondary reflector. However the tube was too narrow for even the smallest astronaut to slither down it, leading to a search for a means of inserting the required corrective components into the tube.

  4. Mirror mount - Wikipedia

    en.wikipedia.org/wiki/Mirror_mount

    The most common type of mirror mount is the kinematic mount. [3] This type of mount is designed according to the principles of kinematic determinacy. Typically, the movable frame that holds the mirror pivots on a ball bearing which is set into a hole in the fixed frame. Ideally, this hole should be trihedral (pyramid-shaped).

  5. Mirror support cell - Wikipedia

    en.wikipedia.org/wiki/Mirror_support_cell

    Astronomical observatories require a much heavier and more complex mirror support cell. One notable example of the structure needed for such telescopes is the dual cell for the M1 mirrors of the 8.4 meter Large Binocular Telescope at Mount Graham International Observatory.

  6. Ritchey–Chrétien telescope - Wikipedia

    en.wikipedia.org/wiki/Ritchey–Chrétien_telescope

    When this element is a mirror, the result is a three-mirror anastigmat. Alternatively, a RCT may use one or several low-power lenses in front of the focal plane as a field-corrector to correct astigmatism and flatten the focal surface, as for example the SDSS telescope and the VISTA telescope ; this can allow a field-of-view up to around 3 ...

  7. Head of Ohio's teacher pension fund retires Sunday, saying ...

    www.aol.com/head-ohios-teacher-pension-fund...

    The outgoing head of Ohio's troubled teachers retirement system said that she is leaving the fund in strong fiscal condition, despite the turmoil at the top that her successor will inherit. In a ...

  8. "Queer Eye” stars Jeremiah Brent, Jonathan Van Ness, Tan France, Karamo Brown and Antoni Porowski talk to TODAY.com about the Netflix show after Bobby Berk's departure.

  9. Magellan Telescopes - Wikipedia

    en.wikipedia.org/wiki/Magellan_Telescopes

    MagAO was originally intended for the Large Binocular Telescope (LBT), but the secondary mirror was damaged before it could be installed. The project leader Laird Close and his team were able to repair and repurpose the broken mirror for use on Magellan II. As built for the LBT, the original MagAO mirror had a diameter of 36 inches (0.91 m).

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