Abell 520 galaxy cluster, composite image

Abell 520 galaxy cluster, composite image

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This image is part of the feature B B C
This image is part of the feature Hubble Space Telescope 25th Anniversary

Credit: NASA, ESA, CFHT, CXO, M.J. Jee (University of California, Davis), and A. Mahdavi (San Francisco State University) /SCIENCE PHOTO LIBRARY

Caption: Abell 520 galaxy cluster. Composite image showing the distribution of dark matter, galaxies and hot gas in the core of the merging galaxy cluster Abell 520, which lies around 2.4 billion light years from Earth. Optical data from the Hubble Space Telescope (HST) and the Canada-France-Hawaii Telescope (CFHT) is shown in red, green, and blue. Starlight from galaxies within the clusters, derived from CFHT observations and smoothed to show the location of most of the galaxies, is coloured orange. This reveals that a clump of dark matter resides near most of the hot gas, where very few galaxies are found. Imaged between October 2000 and January 2008.

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Keywords: 2000, 2008, 21st century, abell 520, astronomical, astronomy, astrophysical, astrophysics, canada-france-hawaii telescope, cfht, cloud, clouds, clump, clumped, composite, dark matter, galaxy cluster, gas, hot, hst, hubble space telescope, no-one, nobody, optical image, space, space telescope, space telescope image, star, starry, stars, universe

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