In May of 2010, Astronomers using NASA’s Chandra X-ray Observatory and ESA’s XMM-Newton detected a vast reservoir of gas lying along a wall-shaped structure of galaxies about 400 million light years from Earth. In the image above the spiral and elliptical galaxies are shown in the Sculptor Wall along with the newly detected intergalactic gas, part of the so-called Warm Hot Intergalactic Medium (WHIM), shown in blue. This discovery is the strongest evidence yet that the “missing matter” in the nearby Universe is located in an enormous web of hot, diffuse gas.
The Sculptor Wall, a type of galaxy filament, the largest known structures in the universe, is a wall-shaped structure of galaxies about 400 million light years from Earth. The wall is faint beyond 500 million light years because the data is incomplete beyond that distance. The nearest part of the wall (the Phoenix supercluster) lies next to a large rectangular void, the Sculptor Void -one of the largest voids in the nearby universe.