File:Britannica Spectroheliograph photo.jpg

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Captions

Captions

Spectroheliograph of the sun showing right and left handed sunspot vortices.
Description
English: Spectroheliograph of the sun showing right and left handed sunspot vortices.
Date
Source Encyclopædia Britannica, 11th ed., 1911, v. 25, between pp. 618 and 619
Author George Ellery Hale
Permission
(Reusing this file)
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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Date/TimeThumbnailDimensionsUserComment
current20:02, 9 December 2010Thumbnail for version as of 20:02, 9 December 20102,117 × 2,669 (787 KB)Bob Burkhardt (talk | contribs){{Information |Description={{en|1=Spectroheliograph of the sun showing right and left handed sunspot vortices.}} |Source=''Encyclopædia Britannica'', 11th ed., 1911, v. 25, between pp. 618 and 619 |Author=George Ellery Hale |Date=October 7, 1908 |Permiss

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