File:Voyage in Space page201.png
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Original file (1,552 × 1,055 pixels, file size: 494 KB, MIME type: image/png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:19, 22 December 2015 | 1,552 × 1,055 (494 KB) | Keith Edkins | {{Information |Description={{en|1=Waxing and waning of sunspots, 1770-1880. The low peaks in 1804, 1817 & 1830 represent the w:Dalton Minimum.}} |Source=A Voyage in Space[https://archive.org/details/voyageinspacecou00turnrich]. |Author=Herbert Hal... |
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