Gabriel Pérez Díaz (SMM
Image of the cluster of galalxies Abell S1063, at a distance of 4,000 million light years from Earth. Superposed on the image can be seen the contours of the distribnution of dark matter (in violet) and the distribution of the weak intracluster light (in green9. The two sets of contours are distributed similarly. Credit: Gabriel Pérez Díaz (SMM, IAC).