File:Abell 370 (Chandra) dark a370.jpg

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DescriptionAbell 370 (Chandra) dark a370.jpg	English: These galaxy clusters are part of a large study using Chandra and Hubble that sets new limits on how dark matter - the mysterious substance that makes up most of the matter in the Universe - interacts with itself. The hot gas that envelopes the clusters glows brightly in X-rays detected by Chandra (pink). When combined with Hubble's visible light data, astronomers can map where the stars and hot gas are after the collision, as well as the inferred distribution of dark matter (blue) through the effect of gravitational lensing.
Date	9 March 2015, 16:22:42
Source	http://chandra.harvard.edu/photo/2015/dark/dark_a370.jpg
Author	X-ray: NASA/CXC/Ecole Polytechnique Federale de Lausanne, Switzerland/D.Harvey & NASA/CXC/Durham Univ/R.Massey; Optical & Lensing Map: NASA, ESA, D. Harvey (Ecole Polytechnique Federale de Lausanne, Switzerland) and R. Massey (Durham University, UK

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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."

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Image title	These galaxy clusters are part of a large study using Chandra and Hubble that sets new limits on how dark matter - the mysterious substance that makes up most of the matter in the Universe - interacts with itself. The hot gas that envelopes the clusters glows brightly in X-rays detected by Chandra (pink). When combined with Hubble's visible light data, astronomers can map where the stars and hot gas are after the collision, as well as the inferred distribution of dark matter (blue) through the effect of gravitational lensing.
Source	Chandra X-ray Observatory
Headline	Six galaxy clusters that are part of a study of 72 colliding clusters.
Credit/Provider	X-ray: NASA/CXC/Ecole Polytechnique Federale de Lausanne, Switzerland/D.Harvey & NASA/CXC/Durham Univ/R.Massey; Optical & Lensing Map: NASA, ESA, D. Harvey (Ecole Polytechnique Federale de Lausanne, Switzerland) and R. Massey (Durham University, UK)
Author	Chandra X-ray Observatory Center
Short title	Dark Matter is Darker Than Once Thought
Usage terms	http://chandra.harvard.edu/photo/image_use.html
Date and time of data generation	26 March 2015
Width	2,263 px
Height	2,207 px
Bits per component	1 0 6,514
Compression scheme	LZW
Pixel composition	RGB
Orientation	Normal
Number of components	3
Horizontal resolution	1.1224461331828 dpi
Vertical resolution	4.2284111111111 dpi
Data arrangement	chunky format
File change date and time	(Macintosh)
Exif version	2.21
Color space	sRGB
Software used	Adobe Photoshop CS6 (Macintosh)
Date and time of digitizing	16:22, 9 March 2015
Date metadata was last modified	07:20, 26 May 2015
Unique ID of original document	xmp.did:046ddb8b-9647-8948-9d81-376405a18a3c
Copyright status	Copyright status not set
Keywords	Abell 370
Contact information	cxcpub@cfa.harvard.edu http://chandra.harvard.edu 60 Garden St. Cambridge, MA, 02138 USA 617.496.7941
IIM version	4

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