File:Britannica Spectroheliograph photo.jpg
Jump to navigation
Jump to search
Size of this preview: 475 × 599 pixels. Other resolutions: 190 × 240 pixels | 381 × 480 pixels | 609 × 768 pixels | 812 × 1,024 pixels | 2,117 × 2,669 pixels.
Original file (2,117 × 2,669 pixels, file size: 787 KB, MIME type: image/jpeg)
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 20:02, 9 December 2010 | 2,117 × 2,669 (787 KB) | Bob Burkhardt | {{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 |
File usage
The following 2 pages use this file: