An interesting conversation about the challenges Newton had making his first reflector telescope using a metal mirror. "This video presents a discussion between Robert J Dalby and mirror-maker Terry Kubecki-Pearce. The subject under discussion is a replica of Isaac Newton's telescope that was presented to leading members of the Royal Society in 1671. Terry and Robert both collaborated on the manufacturing of the replicas in 2009, and one of the aims of the project was to explore the technologies and methods Newton would have used to make his world-changing instrument. As mirror-maker for the project, the discussion with Terry centers on the difficulties he had forming an accurate optical surface on the small metal blanks and the light this throws on Newton's efforts to produce the world's first reflecting telescope three hundred and fifty years ago." The World's First Reflecting Telescope - Astronomy and Nature TV https://youtu.be/zlioUjguQk8 Jamie B "What doesn't kill you makes you stronger. Except for bears, bears will kill you." _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com <mailto:Utah-Astronomy@mailman.xmission.com> The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".