Image:Zurich sunspot number since 1750.png

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Image:Zurich sunspot number since 1750.png

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Zurich_sunspot_number_since_1750.png‎ (800 × 600 pixels, file size: 14 KB, MIME type: image/png)

International sunspot number since 1750.

This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy)

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Use of NASA logos, insignia and emblems are restricted per US law 14 CFR 1221.
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not in the public domain.
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All materials created by the SOHO probe are copyrighted and require permission for commercial non-educational use. [2]
Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3]

http://science.nasa.gov/ssl/pad/solar/images/zurich.gif

File history

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	Date/Time	Dimensions	User	Comment
current	17:07, 6 June 2005	800×600 (14 KB)	SEWilco (Talk \| contribs)	(Sunspot number since 1750. {{PD-USGov-NASA}} http://science.nasa.gov/ssl/pad/solar/images/zurich.gif Category:Solar phenomena)