Reproduction Of William Herschel's Metallic Mirror Telescope

Computer Science – Learning

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Scientific paper

Following the reproduction of Cassini's open-air telescope, which took us almost three years to complete, our club decided to reproduce the metallic mirror telescope invented by William Herschel, which is a telescope of the subsequent generation. We based our design on the 7-foot telescope by which he used to discover Uranus in 1781. The metallic mirror was casted and blended copper and tin in the ratio of seven to three, exactly like the mirrors in those days. The surface of the casted mirror had many imperfections such as hollow portions and bubbles. These were removed by using the rock grinder at our school and the mirror was later polished at the Hidaka Optical Institute. The tube of the mirror was also made up of eight polygons just like the original. When we observed the stars with the metallic mirror telescope, they were a little bit dark, but it was possible to observe them well and to observe the gap between Saturn and Cassini. We also succeeded in observing Uranus with this telescope last September. Reproduction of the telescope mount is being made in a nearly the same design as the original one. We have learned through the reproduction that the unique design of the mount allows us to make observations with precise tracking accuracy in a comfortable observing position.

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