File:Hale telescope mirror during grinding 1945.jpg
Summary
The mirror of the 200-inch <a href="https://en.wikipedia.org/wiki/Hale_telescope" class="extiw" title="w:Hale telescope">Hale telescope</a> at Mt. Palomar Observatory, California in the Caltech Optical Shop in Pasadena when grinding work was resumed following the end of World War 2. It is the largest single piece telescope mirror in the world. The mirror was cast of <a href="https://en.wikipedia.org/wiki/pyrex" class="extiw" title="w:pyrex">pyrex</a> glass in 1923 at Corning Glass Works, New York. Grinding work was halted in 1942 due to pressing war work. The mirror was transported to Palomar Observatory in 1947 and the telescope was completed and saw first light in 1949. The honeycomb support structure on the back of the mirror can be seen through the surface.
Licensing
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:09, 8 January 2017 | | 970 × 615 (121 KB) | 127.0.0.1 (talk) | The mirror of the 200-inch <a href="https://en.wikipedia.org/wiki/Hale_telescope" class="extiw" title="w:Hale telescope">Hale telescope</a> at Mt. Palomar Observatory, California in the Caltech Optical Shop in Pasadena when grinding work was resumed following the end of World War 2. It is the largest single piece telescope mirror in the world. The mirror was cast of <a href="https://en.wikipedia.org/wiki/pyrex" class="extiw" title="w:pyrex">pyrex</a> glass in 1923 at Corning Glass Works, New York. Grinding work was halted in 1942 due to pressing war work. The mirror was transported to Palomar Observatory in 1947 and the telescope was completed and saw first light in 1949. The honeycomb support structure on the back of the mirror can be seen through the surface. |
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