File:Explorer 23.png

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DescriptionExplorer 23.png	English: Scientific satellite Explorer 23 (XXIII). Extracted from NASA Technical Note PDF file. Polski: Satelita naukowy Explorer 23 (XXIII)
Source	NASA - http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19680018726_1968018726.pdf Penn State CiteSeer - summary, download
Author	NASA

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. 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 necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its 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] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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	Date/Time	Dimensions	User	Comment
current	14:05, 28 November 2010	1,735 × 2,481 (102 KB)	LobStoR (talk \| contribs)	extracted from PDF at native resolution and 1-bit monochrome palette
	08:56, 18 April 2010	611 × 861 (135 KB)	NH2501 (talk \| contribs)	Extracted from NASA Technical Note PDF file. Category:Explorer 23
	08:52, 18 April 2010	861 × 611 (113 KB)	NH2501 (talk \| contribs)	{{Information \|Description={{en\|1=Scientific satellite Explorer 23 (XXIII)}} {{pl\|1=Satelita naukowy Explorer 23 (XXIII)}} \|Source=http://www.google.pl/url?sa=t&source=web&ct=res&cd=1&ved=0CAsQFjAA&url=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownlo