1. Reflecting Telescope — 2021-08-14 20:51:21

   … telescope is still very popular and has changed very little in {{datediff from="1668" }} years. ::c:: == Leviathan of Parsonstown == {{Image url="RosseTelescope.jpg" class="right" title="Rosse Telescope" width="" }} The Newtonian principle was taken…
   … to extreme proportions in 1845 with the construction of the **Leviathan of Parsonstown** otherwise known as the **Rosse six-foot telescope**. This was a huge reflecting telescope of **72 inches.** Up to thi…
   …t reflectors were only 30 inches. It was built by **William Parsons, 3rd Earl of Rosse** on his estate, Birr Castle, at Parsonstown in County Offaly, Ireland. With a 72-inch metal mirror weighing 4 tons and a tube 54 feet long, it remained the larges…

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