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  2. Celestron - Wikipedia

    en.wikipedia.org/wiki/Celestron

    Celestron was the first large scale commercial manufacturer of the Schmidt-Cassegrain telescope, introducing its "C8" 8" diameter 2032 mm focal length, ƒ10 telescope in 1970. [7] The primary innovation Celestron/Tom Johnson devised was a method to produce Schmidt corrector plates using a vacuum to pull the glass blanks into a pre-shaped curve ...

  3. Owl Nebula - Wikipedia

    en.wikipedia.org/wiki/Owl_Nebula

    The 14th magnitude central star has passed the turning point in its evolution and is condensing to form a white dwarf. [ 7 ] [ 8 ] It has 55–60% of solar mass, is 41 to 148 times solar luminosity ( L ☉ ), [ 5 ] and has an effective temperature of 123,000 K. [ 9 ] The star has been successfully resolved by the Spitzer Space Telescope as a ...

  4. Schmidt–Cassegrain telescope - Wikipedia

    en.wikipedia.org/wiki/Schmidt–Cassegrain_telescope

    The first large telescope to use the design was the James Gregory Telescope of 1962 at the University of St Andrews. As of 2021, the James Gregory Telescope is also recognized as the largest Schmidt-Cassegrain. [4] The telescope is noted for its large field of view, up 60 times a full moon. [4]

  5. Orion Telescopes & Binoculars - Wikipedia

    en.wikipedia.org/wiki/Orion_Telescopes_&_Binoculars

    Orion ED120 apo refractor on Orion's Sirius EQ-G "GoTo" and GPS equipped German equatorial mount with portable 12 volt power supply. Orion sold a range of telescopes that they characterize as "beginner", "intermediate" or "advanced", including Newtonians, Maksutovs, Schmidt-Cassegrains, Ritchey-Chrétiens and refractors with or without (sold as optical tube assemblies or "OTA") a variety of ...

  6. Sloan Digital Sky Survey - Wikipedia

    en.wikipedia.org/wiki/Sloan_Digital_Sky_Survey

    SDSS uses a dedicated 2.5 m wide-angle optical telescope; from 1998 to 2009 it observed in both imaging and spectroscopic modes. The imaging camera was retired in late 2009, since then the telescope has observed entirely in spectroscopic mode. Images were taken using a photometric system of five filters (named u, g, r, i and z).

  7. Refracting telescope - Wikipedia

    en.wikipedia.org/wiki/Refracting_telescope

    A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope). The refracting telescope design was originally used in spyglasses and astronomical telescopes but is also used for long-focus camera lenses .

  8. Atacama Large Millimeter Array - Wikipedia

    en.wikipedia.org/wiki/Atacama_Large_Millimeter_Array

    By the summer of 2011, sufficient telescopes were operational during the extensive program of testing prior to the Early Science phase for the first images to be captured. [26] These early images gave a first glimpse of the potential of the new array that will produce much better quality images in the future as the scale of the array continues ...

  9. Mercury (planet) - Wikipedia

    en.wikipedia.org/wiki/Mercury_(planet)

    An alternate method for viewing Mercury involves observing the planet with a telescope during daylight hours when conditions are clear, ideally when it is at its greatest elongation. This allows the planet to be found easily, even when using telescopes with 8 cm (3.1 in) apertures.

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