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File:1911 Britannica - Aurora Polaris - Auroral rays (a).png

1911_Britannica_-_Aurora_Polaris_-_Auroral_rays_(a).png ‎(464 × 290 pixels, file size: 185 KB, MIME type: image/png)

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Description
English: Two types of auroral rays.
Illustration from 1911 Encyclopædia Britannica, article Aurora Polaris.
Date
Source Encyclopædia Britannica Eleventh Edition, Vol. 2, Plate I.
Author Encyclopædia Britannica, 1911
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Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

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current02:03, 10 August 2018Thumbnail for version as of 02:03, 10 August 2018464 × 290 (185 KB)User-duck (talk | contribs)Cropped using CropTool with precise mode.

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