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File:NGC 520.tif

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English: NGC 520 — also known as Arp 157 — looks like a galaxy in the midst of exploding. In reality, it’s the exact opposite. Two enormous spiral galaxies are crashing into each other, melding and forming a new conglomerate. This happens slowly, over millions of years — the whole process started some 300 million years ago. The object, about 100 000 light-years across, is now in the middle stage of the merging process, as the two nuclei haven’t merged yet, but the two discs have. The merger features a tail of stars and a prominent dust lane. NGC 520 is one of the brightest interacting galaxies in the sky and lies in the direction of Pisces (the Fish), approximately 100 million light-years from Earth. This image was taken by the ESO Faint Object Spectrograph and Camera attached to the 3.6-metre telescope at La Silla in Chile. It is based on data obtained through B, V, R and H-alpha filters.
Date
Source http://www.eso.org/public/images/potw1048a/
Author ESO
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This file is licensed under the Creative Commons Attribution 3.0 Unported license.
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29 November 2010

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Date/TimeThumbnailDimensionsUserComment
current14:44, 29 November 2010Thumbnail for version as of 14:44, 29 November 2010959 × 959 (1.87 MB)Jmencisom{{Information |Description={{en|1=NGC 520 — also known as Arp 157 — looks like a galaxy in the midst of exploding. In reality, it’s the exact opposite. Two enormous spiral galaxies are crashing into each other, melding and forming a new conglomerate

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