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Composite image of colliding galaxy clusters (photo)

Composite image of colliding galaxy clusters (photo)
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Permission required for non-editorial use (inc book and magazine covers). Please contact us
Largest available format 3600 × 2315 px 2 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB]
Large 3600 × 2315 px 305 × 196 mm 1.6 MB
Medium 1024 × 659 px 87 × 56 mm 789 KB
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IMAGE number
SMT1217247
Image title
Composite image of colliding galaxy clusters (photo)
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Location
National Air and Space Museum, Smithsonian Institution, Washington DC, USA
Medium
photograph
Image description

This image shows the chaotic aftermath of the collision of at least two galaxy clusters, some of the most massive objects in the Universe. X-rays from Chandra (red) show the hot gas that envelopes the clusters. The individual galaxies appear in visible-light observations (yellow and orange). The presence of dark matter (blue) is revealed by the subtle distortions of the distant objects. Some unusual behavior of the dark matter with respect to the galaxies and hot gas in Abell 520 might be explained by changes to the current understanding of dark matter or how galaxy clusters interact when merging.

Photo credit
© Smithsonian Institution / Bridgeman Images
Image keywords
astronomy / dark matter / scientific / science / astronomical / national air and space museum / star / space / cluster / clusters / astrophysics / composite / collision / cosmos / galaxy / astronomy / colliding / smithsonian institution / stars / false colour / galaxies / chandra x-ray observatory / universe / galactic / cxo / abell 520 / Photograph / Photography / Mzphoto

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