File:Galaxy cluster Abell 1689 and distant galaxies (11938899703).jpg

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Description	Astronomers used the sharp eye of the NASA/ESA Hubble Space Telescope and the magnification power of the giant cluster of galaxies Abell 1689 to find 58 remote galaxies, which produced the bulk of new stars during the Universe's early years. They are the smallest, faintest, and most numerous galaxies ever seen in the remote Universe. More information: <a href="http://www.spacetelescope.org/images/opo1407a/" rel="nofollow">www.spacetelescope.org/images/opo1407a/</a> Credit: NASA, ESA, and B. Siana and A. Alavi (University of California, Riverside)
Date	8 January 2014, 13:49
Source	Galaxy cluster Abell 1689 and distant galaxies
Author	Hubble ESA

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This image was originally posted to Flickr by Hubble Space Telescope / ESA at https://flickr.com/photos/51268976@N08/11938899703. It was reviewed on 8 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

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Image title	Astronomers used the sharp eye of the NASA/ESA Hubble Space Telescope and the magnification power of the giant cluster of galaxies Abell 1689 to find 58 remote galaxies, which produced the bulk of new stars during the Universe's early years. They are the smallest, faintest, and most numerous galaxies ever seen in the remote Universe. The white circles sprinkled throughout the image of the galaxy cluster on the left pinpoint the location of the magnified images of most of the faraway galaxies. The image is a blend of exposures taken by Hubble's Advanced Camera for Surveys and Wide Field Camera 3. Seeing the tiny galaxies mixed in with the cluster galaxies is an illusion. They are actually far away from Abell 1689. Hubble photographed the distant galaxies as they appeared more than 10 billion years ago, during the heyday of star birth. The galaxies would normally be too faint for Hubble to see. To detect them, astronomers teamed Hubble with Abell 1689, which magnified the light from the galaxies behind it due to a phenomenon called gravitational lensing. Gravity warps space, acting like a giant funhouse mirror to stretch and brighten distant objects, allowing Hubble to resolve them. The postage stamp-sized images on the right show 36 of the distant galaxies. Their bright blue colour reveals that they are ablaze with star birth. Hubble's Wide Field Camera 3 captured these images of the galaxies in ultraviolet light, a reliable tracer of star birth. The Hubble analysis shows that they are irregularly-shaped and measure just a few thousand light-years across. These galaxies are about one-tenth of the mass of the typical progenitors of galaxies like our Milky Way. Abell 1689 is 2.5 billion light-years from Earth. Links: NASA Press release Galaxy cluster Abell 1689 Distant galaxies behind Abell 1689
Source	ESA/Hubble
Credit/Provider	NASA, ESA, and B. Siana and A. Alavi (University of California, Riverside)
Short title	Galaxy cluster Abell 1689 and distant galaxies
Usage terms	Creative Commons Attribution 3.0 Unported license
Date and time of data generation	13:49, 8 January 2014
Software used	Adobe Photoshop CS6 (Macintosh)
Unique ID of original document	xmp.did:2133A5891120681180838CD1AA153BC4
Keywords	Abell 1689
Contact information	http://www.spacetelescope.org/ Karl-Schwarzschild-Strasse 2 Garching bei M√ºnchen, , D-85748 Germany

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