File:Comet Paraskevopoulos 1941c.jpg

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Description
English: Comet 1941c (Paraskevopoulos) on 16 February 1941. 13 minutes exposure with the 24-inch reflector telescope of Yerkes Observatory.
Date
Source Comet Notes: Comet 1941 a (Friend); Comet 1941 b (Periodic Encke); Comet 1941 c (Paraskevopoulos); Comet 1930 VI (Schwassmann-Wachmann), Popular Astronomy, Vol. 49, p.217
Author George Van Biesbroeck

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This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.

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Date/TimeThumbnailDimensionsUserComment
current14:57, 31 January 2023Thumbnail for version as of 14:57, 31 January 20231,000 × 901 (139 KB)C messier (talk | contribs)better version from http://photoarchive.lib.uchicago.edu/db.xqy?show=browse7.xml%7C1969
14:56, 31 January 2023Thumbnail for version as of 14:56, 31 January 2023556 × 436 (19 KB)C messier (talk | contribs)Uploaded a work by George Van Biesbroeck from [https://articles.adsabs.harvard.edu/full/seri/PA.../0049//0000219.000.html Comet Notes: Comet 1941 a (Friend); Comet 1941 b (Periodic Encke); Comet 1941 c (Paraskevopoulos); Comet 1930 VI (Schwassmann-Wachmann)], Popular Astronomy, Vol. 49, p.217 with UploadWizard

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