File:Comet Wilk 1930c.jpg

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Captions

Captions

Comet Wilk 1930c on 23 April 1930, plate exposed on 15 minutes with the 24-inch reflector

Summary

[edit]
Description
English: Comet Wilk 1930c on 23 April 1930, plate exposed on 15 minutes with the 24-inch reflector
Date 23-4-1930
Source Comet notes: Comet 1930 c (Wilk) (1930) Popular Astronomy, Vol. 38, p.310
Author George van Biesbroeck

Licensing

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This work is in the public domain in the United States because it was published in the United States between 1930 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
current12:10, 11 December 2024Thumbnail for version as of 12:10, 11 December 2024922 × 497 (184 KB)C messier (talk | contribs)Uploaded a work by George van Biesbroeck from [https://articles.adsabs.harvard.edu/pdf/1930PA.....38..310V Comet notes: Comet 1930 c (Wilk)] (1930) Popular Astronomy, Vol. 38, p.310 with UploadWizard

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