Matter Distribution Maps reveal Cosmic Scaffolding

The formation of the large-scale structure of the Universe is essentially determined by the Dark Matter, which constitutes the dominating part of the matter density of the Universe. The visible matter then follows these structures and gives only an indirect picture of the cosmic matter distribution. The COSMOS survey succeeded to provide most detailed picture of the Dark Matter in a sky region with a size of 1.6 square degrees. For the first time the scaffolding of the matter distribution with angular resolution on the sky as well as in depth is seen. It shows a loose network of filaments which intersect in massive structures identified with the locations of galaxy clusters. This overall structure is in good agreement with computer simulations of structure formation models.