Composite optical/X-ray image of two clusters of galaxies Abell 222 and Abell 223. The two clusters are connected by a filament of hot, low-density gas. The optical image was obtained by SuprimeCam at the Subaru telescope, and the X-ray image showing the distribution of the diffuse hot gas (red to yellow) was obtained by XMM-Newton.
This work by Jörg Dietrich, Norbert Werner, and Alexis
Finoguenov is licensed under a
Creative
Commons Attribution-ShareAlike 3.0 Unported License.