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  2. Horizontal coordinate system - Wikipedia

    en.wikipedia.org/wiki/Horizontal_coordinate_system

    [5] The following are two independent horizontal angular coordinates: Altitude (alt. or altitude angle [b]), sometimes referred to as elevation (el. or elevation angle [c]) or apparent height, is the angle between the object and the observer's local horizon. For visible objects, it is an angle between 0° and 90°.

  3. Altazimuth mount - Wikipedia

    en.wikipedia.org/wiki/Altazimuth_mount

    An altazimuth mount or alt-azimuth mount is a simple two-axis mount for supporting and rotating an instrument about two perpendicular axes – one vertical and the other horizontal. Rotation about the vertical axis varies the azimuth (compass bearing) of the pointing direction of the instrument.

  4. Telescope mount - Wikipedia

    en.wikipedia.org/wiki/Telescope_mount

    Alt-alt mounts, or altitude-altitude mounts, are designs similar to horizontal equatorial yoke mounts or Cardan suspension gimbals. This mount is an alternative to the altazimuth mount that has the advantage of not having a blind spot near the zenith, and for objects near the celestial equator the field rotation is minimized. [7]

  5. iPhone 5 - Wikipedia

    en.wikipedia.org/wiki/IPhone_5

    [5] [115] AT&T said that the iPhone 5 was the fastest-selling iPhone the company had ever offered, selling over five million units on launch weekend and exceeding the supply available. [6] [116] [117] The release and sale of the iPhone 5 has also slowed down the growth of Android according to market share reports released by Kantar Worldpanel ...

  6. Equatorial mount - Wikipedia

    en.wikipedia.org/wiki/Equatorial_mount

    A large German equatorial mount on the Forststernwarte Jena 50cm Cassegrain reflector telescope. An equatorial mount is a mount for instruments that compensates for Earth's rotation by having one rotational axis, called polar axis, parallel to the Earth's axis of rotation. [1] [2] This type of mount is used for astronomical telescopes and cameras.

  7. Celestron - Wikipedia

    en.wikipedia.org/wiki/Celestron

    Celestron, LLC is a company that manufactures telescopes and distributes telescopes, binoculars, spotting scopes, microscopes, and accessories manufactured by its parent company, the Synta Technology Corporation of Taiwan.

  8. AT&T Mobility - Wikipedia

    en.wikipedia.org/wiki/AT&T_Mobility

    According to Apple, over 1.7 million iPhone 4 units were sold in the first few days, which is the most out of any phone ever sold. These sales propelled AT&T to strong Q2 results. The iPhone 5 was released on September 12, 2012. Apple reported selling 5 million iPhone 5's in the first weekend. [74] AT&T activated 8.5 million iPhones in Q4 of ...

  9. Altitude-azimuth - Wikipedia

    en.wikipedia.org/wiki/Altitude-azimuth

    Altitude-azimuth, alt-azimuth, or alt-az may refer to: Horizontal coordinate system, or altitude-azimuth coordinates; Altazimuth mount, a two-axis telescope mount

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