Source: NASA Chandra
Composite image of the El Gordo galaxy cluster.
Image credits: X-ray: NASA/CXC/Rutgers/J. Hughes et al;
Optical: ESO/VLT & SOAR/Rutgers/F. Menanteau;
IR: NASA/JPL/Rutgers/F. Menanteau )
An exceptional galaxy cluster, the largest seen in the distant universe, has been found using Chandra X-ray Observatory and the National Science Foundation-funded Atacama Cosmology Telescope (ACT) in Chile.
Officially known as ACT-CL J0102-4915, the galaxy cluster has been nicknamed "El Gordo" ("the big one" or "the fat one" in Spanish) by the researchers who discovered it. The name, in a nod to the Chilean connection, describes just one of the remarkable qualities of the cluster, which is located more than 7 billion light years from Earth. This large distance means it is being observed at a young age. (read more)