File:Herschel1789scope2.jpeg
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Summary
| Description |
English: An illustration from the 1797 edition Encyclopaedia Britannica Volume 18 of William Herschel's 120 cm (48-inch) reflecting telescope with a 12 m (40 foot) long focal length, also called his "40-foot telescope". The telescope was constructed between 1785 and 1789 at Observatory House in Slough, England and was the largest in the world for 50 years. It was dismantled in 1840. |
| Date | |
| Source | 1797 edition Encyclopaedia Britannica Volume 18 "telescope" |
| Author | Britannica |
Licensing
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:08, 4 March 2012 | | 2,113 × 2,477 (2.22 MB) | DigbyDalton |
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