File:RX J1347.5-1145.jpg

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DescriptionRX J1347.5-1145.jpg	English: These four galaxy clusters were part of a large survey of over 300 clusters used to investigate dark energy, the mysterious energy that is currently driving the accelerating expansion of the Universe. In these composite images, X-rays from Chandra (purple) have been combined with optical light from Hubble and Sloan Digital Sky Survey (red, green, and blue). Researchers used a novel technique that takes advantage of the observation that the outer reaches of galaxy clusters, the largest structures in the universe held together by gravity, show similarity in their X-ray emission profiles and sizes.
Date	18 March 2016, 13:52:07
Source	http://chandra.si.edu/photo/2016/clusters/clusters_rxj1347.jpg
Author	NASA/CXC/Univ. of Alabama/A. Morandi et al

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Image title	These four galaxy clusters were part of a large survey of over 300 clusters used to investigate dark energy, the mysterious energy that is currently driving the accelerating expansion of the Universe. In these composite images, X-rays from Chandra (purple) have been combined with optical light from Hubble and Sloan Digital Sky Survey (red, green, and blue). Researchers used a novel technique that takes advantage of the observation that the outer reaches of galaxy clusters, the largest structures in the universe held together by gravity, show similarity in their X-ray emission profiles and sizes.
Source	Chandra X-ray Observatory
Headline	From a sample of over 300 galaxy clusters used to study dark energy.
Credit/Provider	X-ray: NASA/CXC/Univ. of Alabama/A. Morandi et al; Optical: SDSS, NASA/STScI
Author	Chandra X-ray Observatory Center
Short title	"Russian Doll" Galaxy Clusters Reveal Information About Dark Energy
Usage terms	http://chandra.harvard.edu/photo/image_use.html
Date and time of data generation	28 April 2016
Orientation	Normal
Horizontal resolution	0.005952380952381 dpi
Vertical resolution	0.00031111111111111 dpi
File change date and time	(Macintosh)
Exif version	2.21
Color space	sRGB
Software used	Adobe Photoshop CS6 (Macintosh)
Date metadata was last modified	09:52, 28 April 2016
Date and time of digitizing	13:52, 18 March 2016
Unique ID of original document	CEFA8F7D451234051396E0DC122A32D2
Keywords	RXJ 1347.5-1145
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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