File:PSM V04 D410 Sunspot and protuberance frequency.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:43, 28 June 2010 | 1,641 × 1,385 (109 KB) | Ineuw | {{Information |Description = Sunspot and protuberance frequency |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_4.djvu/410 |Date = 1873-1874 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} {{GFDL-user-w|e |
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