File:GOODS Chandra Deep Field-North.jpg

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DescriptionGOODS Chandra Deep Field-North.jpg	English: Chandra's Deep Field North image is the most sensitive or "deepest" X-ray exposure ever made. The faintest sources produced only one X-ray photon every 4 days. More than 500 X-ray sources are present in this high-energy core sample of the early universe. A few are stars in our galaxy, but most of the sources are supermassive black holes in the centers of distant galaxies. If the number of supermassive black holes seen in this patch of the sky is typical, the total number detectable over the whole sky at this level of sensitivity would be 300 million.
Date	between 13 November 1999 and 22 February 2002
Source	https://flic.kr/p/5tRw9T (see also http://chandra.harvard.edu/photo/2003/goods/)
Author	NASA/CXC/PSU/D.M.Alexander, F.E.Bauer, W.N.Brandt et al.

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	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."

This image was originally posted to Flickr by Smithsonian Institution at https://flickr.com/photos/25053835@N03/2940634387. It was reviewed on 2017-08-03 20:41:30 by FlickreviewR, who found it to be licensed under the terms of the No known copyright restrictions, which is compatible with the Commons. It is, however, not the same license as given above, and it is unknown whether that license ever was valid.

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Image title	Chandra's Deep Field North image is the most sensitive or "deepest" X-ray exposure ever made. The faintest sources produced only one X-ray photon every 4 days. More than 500 X-ray sources are present in this high-energy core sample of the early universe. A few are stars in our galaxy, but most of the sources are supermassive black holes in the centers of distant galaxies. If the number of supermassive black holes seen in this patch of the sky is typical, the total number detectable over the whole sky at this level of sensitivity would be 300 million.
Author	Chandra X-ray Observatory Center
Copyright holder	http://chandra.harvard.edu/photo/image_use.html
Label	Review
Credit/Provider	NASA/CXC/PSU/D.M.Alexander, F.E.Bauer, W.N.Brandt et al.
Source	Chandra X-ray Observatory
Headline	An X-ray image made by observing a region of the sky three-fifths the size of the full moon for 23 days.
Online copyright statement
Short title	GOODS Chandra Deep Field-North: The Secret Lives Of Galaxies Unveiled In Deep Survey
Usage terms	http://chandra.harvard.edu/photo/image_use.html
Date and time of data generation	19 June 2003
Width	2,400 px
Height	2,400 px
Bits per component	8 8 8
Compression scheme	LZW
Pixel composition	RGB
Orientation	Normal
Number of components	3
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Data arrangement	chunky format
Software used	Adobe Photoshop CS3 Macintosh
File change date and time	18:33, 8 October 2008
Color space	Uncalibrated
Image width	2,400 px
Image height	2,400 px
Exif version	2.21
Date and time of digitizing	14:33, 8 October 2008
Date metadata was last modified	14:39, 8 October 2008
Keywords	Chandra Deep Field-North
Contact information	cxcpub@cfa.harvard.edu Public Domain 60 Garden st. Cambridge, MA, 02138 USA 617.496.7941
IIM version	2

File:GOODS Chandra Deep Field-North.jpg

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