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Image of the Day: The Huge Dark Matter Ring of a Distant Galaxy Cluster

  DarkMatterRingInGalaxyCluster

This image of gravitationally magnified faint galaxies far in the distance behind a massive cluster of galaxies from the Hubble Space Telescope indicates that a huge ring of dark matter likely exists surrounding the center of galaxy cluster CL0024+17 that has no normal matter counterpart.

What is visible in the above image are spectacular galaxies that are part of CL0024+17 itself, typically appearing tan in color. Next, a close inspection of the cluster center shows several unusual and repeated galaxy shapes, typically more blue.

These multiple images of a few distant galaxies show that the cluster is a strong gravitational lens. It is the relatively weak distortions of the many distant faint blue galaxies all over the image, however, that indicates the existence of the dark matter ring.

The computationally modeled dark matter ring spans about five million light years and been digitally superimposed to the image in diffuse blue. A hypothesis for the formation of the huge dark matter ring holds that it is a transient feature formed when galaxy cluster CL0024+17 collided with another cluster of galaxies about one billion years ago, "leaving a ring similar to when a rock is thrown in a pond" according to NASA experts.

Image credit: NASA, ESA, M.J. Jee and H. Ford (Johns Hopkins University)

Comments

So, is the Dark Matter the dark ring, or the light "clouds"?

"The computationally modeled dark matter ring spans about five million light years and been digitally superimposed to the image in diffuse blue." The image has been Photoshopped. The relatively weak distortions assigned to 'dark matter' would otherwise indistinguishable from what appears to be visually empty space. (Sigh.)

"Image of the Day: The Huge Empty Space Ring of a Distant Galxay Cluster" won't attract readers, advertisers, or government funding.

Thank you for your analysis and sharing, from your article I learned more.

Thank you for your analysis and sharing

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