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  2. The 20 best Walmart deals this week: Kitchen appliances, a ...

    www.aol.com/lifestyle/the-20-best-walmart-deals...

    A power bank can be a lifesaver for a busy person. Use it to charge phones, tablets, e-readers, headphones and much more. This one by Anker has over 20,000mAh power reserve and provides over four ...

  3. Liquid-mirror telescope - Wikipedia

    en.wikipedia.org/wiki/Liquid-mirror_telescope

    The greatest advantage of a liquid mirror is its small cost, about 1% of a conventional telescope mirror. This cuts down the cost of the entire telescope at least 95%. The University of British Columbia’s 6-meter Large Zenith Telescope cost about a fiftieth as much as a conventional telescope with a glass mirror. [11]

  4. Optical Mechanics, Inc. - Wikipedia

    en.wikipedia.org/wiki/Optical_Mechanics,_Inc.

    Optical Mechanics, Inc. or OMI is a high-end American telescope and optics instrument manufacturer. OMI was founded in 2002 and produces observatory telescopes, Lidar telescopes, optical tube assemblies, telescope mirrors and reflective coatings for mirrors. OMI mirrors are used by other telescope makers such as Obsession Telescopes. [1]

  5. This $35 mirror is 'like trying on clothes in a super fancy ...

    www.aol.com/lifestyle/gold-arch-mirror-walmart...

    This stunning floor-length mirror can be used in several ways: as a standing floor mirror, leaning against a wall or mounted onto the wall — the design options are endless. $35 at Walmart

  6. Walmart's secret sale room is the perfect place for last ...

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    Walmart's secret sale room is the perfect place for last-minute gift shopping — all arrive by Christmas Heather Quinlan and Rory Halperin Updated December 20, 2023 at 10:02 AM

  7. Reflecting telescope - Wikipedia

    en.wikipedia.org/wiki/Reflecting_telescope

    Stratospheric Observatory for Infrared Astronomy 24-inch convertible Newtonian/Cassegrain reflecting telescope on display at the Franklin Institute. A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image.

  8. Catadioptric system - Wikipedia

    en.wikipedia.org/wiki/Catadioptric_system

    The Schmidt camera is a wide-field photographic telescope, with the corrector plate at the center of curvature of the primary mirror, producing an image at a focus inside the tube assembly at the prime focus where a curved film plate or detector is mounted. The relatively thin and lightweight corrector allows Schmidt cameras to be constructed ...

  9. Three-mirror anastigmat - Wikipedia

    en.wikipedia.org/wiki/Three-mirror_anastigmat

    The James Webb Space Telescope is a three-mirror anastigmat featuring an ellipsoidal primary, hyperboloidal secondary, and ellipsoidal tertiary. [8] The Euclid mission uses a Korsch telescope. The "Cambridge University Three-Mirror Telescope". project includes a 100 mm working model built in 1985 and a 500 mm prototype built in 1986.

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