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Galileoscope, LLC

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P.O. Box 2009
Kenosha, Wisconsin - 53141 United States
Phone: +1 603-401-8249
Galileoscope, LLC

Galileoscope, LLC, is the creator and global provider of the Galileoscope, a high-quality, low-cost telescope kit developed by a team of astronomers, optical engineers, and science educators for the International Year of Astronomy (IYA) 2009 and now a cornerstone project of the International Year of Light (IYL) 2015.

The Galileoscope is a 50-mm (2-inch) diameter, 25- to 50-power achromatic refractor whose assembly takes only minutes and requires no tools, tape, glue, or other nonsense. In contrast to other inexpensive telescope kits, the Galileoscope can be used effectively both in the classroom to investigate how lenses make images and outside under the stars as a tool for cosmic exploration. Even from brightly lit cities, with the Galileoscope anyone can see the celestial wonders that Galileo first glimpsed 400 years ago and that still delight stargazers today: lunar craters and mountains, four moons circling Jupiter, the phases of Venus, Saturn’s rings, the Pleiades star cluster, sunspots (with a safe solar filter covering the aperture, of course), and more.

Teaching materials developed for use with the Galileoscope, including an educator’s guide on how lenses and refracting telescopes work and an observer’s guide on suitable astronomical targets for the Galileoscope, are freely available online and have been translated into many languages. Numerous science-education efforts around the world incorporate the Galileoscope into their curriculum, including the U.S. National Optical Astronomy Observatory’s Teaching with Telescopes program and the international Galileo Teacher Training Program (GTTP).

Of the approximately 225,000 Galileoscopes distributed so far, about one-third have been sold via ~30,000 small orders from individuals, and about two-thirds have been sold via ~600 large orders from institutions. More than 20,000 kits were donated to schools, some in the U.S. and some in less developed countries, chiefly in Africa and the Middle East.

Galileoscope, LLC, has entered into a partnership with the Astrosphere New Media Association, a U.S. 501(c)(3) nonprofit organization dedicated to improving science literacy and education ( Astrosphere has created Telescopes4Teachers (, a program through which supporters in the U.S. can make tax-deductible donations of Galileoscopes to teachers and schools of their choosing and supporters anywhere can make donations to support the distribution of Galileoscopes worldwide. This is in response to requests from teachers for donated telescopes, and to requests from customers for a way to donate telescopes to schools.

Galileoscopes & Solar Filters Available for August 2017 Solar Eclipse

Galileoscopes & Solar Filters Available for August 2017 Solar Eclipse

Galileoscope is now offering Galileoscope telescope and optics kits bundled with ISO-certified safe solar filters from Rainbow Symphony. This combination is perfect for the August 21, 2017, solar eclipse — for individuals, schools, clubs, libraries, museums, planetariums, science centers, and…


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