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The Galileoscope is a high-quality telescope kit created by astronomers, optical engineers, and science educators. Because it is produced and distributed by volunteers, it is available at low cost to support science education worldwide. With some 225,000 kits already in use by teachers and students in more than 100 countries, the Galileoscope has been designated an International Year of Light cornerstone project, with the goal of distributing an additional 100,000 telescopes during 2015.

While assembling the kit, which requires no tools or adhesives, students learn basic optical concepts, including how lenses form images. With their completed 2-inch-diameter, 25- to 50-power telescope, they enjoy sharp views of lunar craters and mountains, Jupiter and its moons, and Saturn’s rings. The kit is augmented with free, standards-based optics-education and observing activities, available in multiple languages. These can be used to teach science and the process of science at all grade levels.

Each Galileoscope kit assembles in minutes and includes the following:

  • 50-mm f/10 achromatic objective lens, glass
  • 25x achromatic eyepiece lens pair, plastic
  • 17x achromatic Galilean eyepiece/2x Barlow lens, plastic
  • Telescope, focuser, eyepiece, Barlow, and base parts, plastic with rubber O-rings
  • ¼-20 mounting nut, metal
  • Assembly instructions
  • Sun-warning sticker
  • Size: 19½ by 6¼ by 4¼ inches (49.5 by 15.9 by 11.1 cm).
  • Weight: 2.6 lb (1.2 kg).

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