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Sun_in_X-Ray.png‎ (339 kB, MIME-Typ: image/png)

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Description	This image shows the Sun as viewed by the Soft X-Ray Telescope (SXT) onboard the orbiting Yohkoh satellite. The bright, loop-like structures are hot (millions of degrees) plasma (electrically charged gas) confined by magnetic fields rooted in the solar interior. An image of the sun in visible light would show sunspots at the feet of many of these loops. The halo of gas extending well beyond the sun is called the corona. The darker regions at the North and South poles of the Sun are coronal holes, where the magnetic field lines are open to space and allow particles to escape.
Source	NASA Goddard Laboratory for Atmospheres http://rsd.gsfc.nasa.gov/rsd/images/yohkoh.html http://rsd.gsfc.nasa.gov/rsd/images/yohkoh_l.gif
Date	-
Author	NASA Goddard Laboratory for Atmospheres
Permission	Copyright information from http://rsd.gsfc.nasa.gov/rsd/About.html - Images produced by NASA are usually free of copyright [...]

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).

Warnings:

Use of NASA logos (which include the current "meatball" logo, the old "worm" logo, and the seal) is restricted.
Materials from the Hubble Space Telescope may be copyrighted if they do not explicitly come from the STScI. [1]
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]

[edit] Further source information

From: http://www.lmsal.com/SXT/html2/extended_corona_8_may_92_enhanced_red.html
Data policy: http://www.lmsal.com/SXT/index.html and follow link to http://solar.physics.montana.edu/sxt_obsrpt/new_data_policy.txt

Whether or not this is ok for WP I leave to you to judge. --Rivi 22:26, 13 October 2006 (UTC)

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Reason for deletion request:

I (as uploader) want to discuss the problem within a broader audience. It's a complicate case as the satellite is a colaboration of US, UK and Japan. When uploading that file I wasn't aware of the other pages mentioned by Rivi and did investigate thoroughly the NASA pages that indicated PD-US-Gov (no exception disclaimer visible on that pages linked above in the source field). So the problem discussion will evolve in some general thoughts on guidelines how to interpret NASA copyright notices and source info with regard to scientific collaborations of NASA. Arnomane 19:08, 17 November 2006 (UTC)

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Bild:Sun in X-Ray.png

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[edit] Further source information

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