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File:She Shan Observatory - Blink comparator.jpg

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English: Blink comparator at She Shan Observatory (Shanghai, China).
Caption reads: "Blink comparator. By swiftly comparing a series of photographs taken at different times, it is possible to detect the motion of some celestial bodies such as planets. Clyde Tombaugh discovered Pluto in 1930 with a similar instrument."
Français : Comparateur à éclipses à l'observatoire de She Shan (Shanghai, Chine).
Comparateur à éclipses. En comparant rapidement une série de photos prises à des instants différents, il est possible de déceler le mouvement de certains astres tels que des planètes. C'est avec un appareil de ce type que Clyde Tombaugh a découvert Pluton en 1930.
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This illustration was made by Peter Potrowl.

Please credit this with : © Peter Potrowl in the immediate vicinity of the image. A link to my website sitemai.eu would be much appreciated but isn't mandatory.

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Do not copy this image illegally by ignoring the terms of the license below, as it is not in the public domain. If you would like special permission to use, license, or purchase the image please contact me Peter Potrowl to negotiate terms.

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30 May 2010

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current14:48, 31 May 2010Thumbnail for version as of 14:48, 31 May 20101,824 × 1,368 (266 KB)Peter17{{Information |Description={{en|1=Blink comparator at She Shan Observatory (Shanghai, China).<br /> Caption reads: "Blink comparator. By swiftly comparing a series of photographs taken at different times, it is possible to detect the motion of some celest

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