File:Supersonic Bullet Shadowgraph.jpg

Summary[edit]

Image of a supersonic bullet created using a Shadowgraph. The V-shaped shockwaves are clearly visible; propagating from the front-most tip of the bullet is the "bow shockwave," behind which are various other shockwaves caused by the bullets driving bands -- raised bands around the bullet that form a seal with the barrels riflings. Trailing the bullet is a region of strong turbulence, which forms as air rushes in to fill the partial vacuum behind it.

Image from NASA: http://www.nasa.gov/mission_pages/galex/20070815/f.html courtesy of Andrew Davidhazy/Rochester Institute of Technology

I cleaned up, resized and edited this photo.

Licensing:[edit]

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, insignia and emblems is 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. 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] PD Public domain false false

This file is a candidate to be copied to Wikimedia Commons. Any user may perform this transfer; refer to Wikipedia:Moving files to Commons for details. If this file has problems with attribution, copyright, or is otherwise ineligible for Commons, then remove this tag and DO NOT transfer it; repeat violators may be blocked from editing. Other Instructions Endorse this file for transfer by adding |human=<your username> to this Template. If this file is freely licensed, but otherwise unsuitable for Commons (e.g. out of Commons' scope, still copyrighted in the US), then replace this Template with {{Do not move to Commons|reason=<Why it can't be moved>}} If you think that a local copy of this file should be retained, then replace this Template with {{Keep local|reason=<Why a local copy is needed>}} Please ensure that the file has a properly descriptive and unambiguous name before transferring; see Wikipedia:File mover#What files should be renamed? for details.

This file was suggested for transfer by a bot (User:Svenbot). Please verify that this file is suitable for Commons before transferring it.

This photograph was not created by NASA - it was made by me, Prof. Andrew Davidhazy, and I retain copyright but allow usage for educational purposes. Commercial use strictly forbidden without permission. This is a cropped version of the full image which you can see here: http://www.davidhazy.org/andpph/photofile-b/shadowgraph-bullet-1.jpg

I don't know how to modify or deal with Commons License etc. so would appreciate assistance in this regard.

This media file is either in the public domain or published under a free license, and contains no inbound file links. If this media file is useful, then it should be transferred to the Wikimedia Commons. If this media is not useful, then please propose it for deletion or list it at files for discussion.