Abell 222/223
  with dark matter filament

Composite optical image of two clusters of galaxies Abell 222 and Abell 223 with a dark matter map overlayed in blue shading and yellow contours. The two clusters are connected by a filament of dark matter. The optical image was obtained by SuprimeCam at the Subaru telescope. The mass map is based on the gravitational lensing signal of more than 40,000 background galaxies.

Creative Commons License
This work by Jörg Dietrich, University of Michigan/University Obervatory Munich is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.