File:Gravitational Lensing in Galaxy Cluster Abell 370 (27747572370).jpg

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Description	NASA's Hubble Space has peered nearly 5 billion light-years away to resolve intricate details in the galaxy cluster Abell 370. This object is one of the very first galaxy clusters where astronomers observed the phenomenon of gravitational lensing, where the warping of space by the cluster's gravitational field distorts the light from galaxies lying far behind it. This is manifested as arcs and streaks in the picture, which are the stretched images of background galaxies. Gravitational lensing proves a vital tool for astronomers when measuring the dark matter distribution in massive clusters, since the mass distribution can be reconstructed from its gravitational effects. Galaxy clusters are the most massive structures of the universe, located at the crossing of the filaments of the cosmic web of dark matter. The most massive clusters can contain up to 1,000 galaxies and intergalactic hot gas, all held together primarily by the gravity of dark matter. For more information, visit: <a href="http://hubblesite.org/image/2607/news_release/2009-25" rel="nofollow">hubblesite.org/image/2607/news_release/2009-25</a> Credit: NASA, ESA, the Hubble SM4 ERO Team, and ST-ECF
Date	1 July 2016, 18:30
Source	Gravitational Lensing in Galaxy Cluster Abell 370
Author	NASA Hubble Space Telescope

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This image was originally posted to Flickr by NASA Hubble at https://flickr.com/photos/144614754@N02/27747572370 (archive). It was reviewed on 13 July 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

13 July 2018

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Source	STScI
Author	Space Telescope Science Institute Office of Public Outreach
Image title	NASA's Hubble Space has peered nearly 5 billion light-years away to resolve intricate details in the galaxy cluster Abell 370. This object is one of the very first galaxy clusters where astronomers observed the phenomenon of gravitational lensing, where the warping of space by the cluster's gravitational field distorts the light from galaxies lying far behind it. This is manifested as arcs and streaks in the picture, which are the stretched images of background galaxies. Gravitational lensing proves a vital tool for astronomers when measuring the dark matter distribution in massive clusters, since the mass distribution can be reconstructed from its gravitational effects. Galaxy clusters are the most massive structures of the universe, located at the crossing of the filaments of the cosmic web of dark matter. The most massive clusters can contain up to 1,000 galaxies and intergalactic hot gas, all held together primarily by the gravity of dark matter.
Publisher	STScI
Copyright holder	http://hubblesite.org/copyright/
Short title	Gravitational Lensing in Galaxy Cluster Abell 370
Credit/Provider	NASA, ESA, the Hubble SM4 ERO Team, and ST-ECF
Headline	NASA's Hubble Space Telescope has imaged gravitational lensing in the galaxy cluster Abell 370, which is located 4.9 billion light-years away.
Usage terms	http://hubblesite.org/copyright/
Online copyright statement	http://hubblesite.org/copyright/
Date and time of data generation	9 September 2009
IIM version	4
Contact information	outreach@stsci.edu http://hubblesite.org 3700 San Martin Drive Baltimore, MD, 21218 USA 410-338-4444
Keywords	Abell 370
Type of media	Observation
Date and time of digitizing	10:21, 21 August 2009
Software used	Adobe Photoshop CS3 Macintosh
Date metadata was last modified	6 April 2015
File change date and time	13:01, 24 March 2014
Unique ID of original document	uuid:5DC8ED7D668EDE119834E4B02242781B

File:Gravitational Lensing in Galaxy Cluster Abell 370 (27747572370).jpg

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