Hubble Finds Dark Matter Ring in Galaxy Cluster Space Wallpaper

Hubble Finds Dark Matter Ring in Galaxy Cluster
This Hubble Space Telescope composite image shows a ghostly "ring" of dark matter in the galaxy cluster Cl 0024+17.
(Image: © NASA, ESA, M.J. Jee and H. Ford (Johns Hopkins University) )

This Hubble Space Telescope composite image shows a ghostly "ring" of dark matter in the galaxy cluster Cl 0024+17 in this stunning space wallpaper. The ring-like structure is evident in the blue map of the cluster's dark matter distribution. The map is superimposed on a Hubble image of the cluster. The ring is one of the strongest pieces of evidence to date for the existence of dark matter, an unknown substance that pervades the universe.

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