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Plans for Building a Sidewalk Telescope
This site provides plans for building a telescope using easily obtainable materials, such as plywood, cardboard tube, nails, sheet metal screws, and a phonograph record. Includes safety warnings on handling the mirrors needed for the telescope, sources for materials, and detailed step-by-step diagrams. Presented by John Dobson, amateur astronomer and founder of "Sidewalk Astronomers," a nonprofit organization dedicated to introducing the general public to stargazing.
http://www.cdcc.sc.usp.br/cda/telescopios/tie-jpl-nasa/
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