Researchers have simulated nearly 4 million cosmic images using Argonne National Laboratory’s supercomputers, previewing what NASA’s Roman Space Telescope and the Vera C. Rubin Observatory will see. Led by Michael Troxel from Duke University, the OpenUniverse project released 10 terabytes of data, with 390 terabytes to follow. The simulation, incorporating telescope instrument performance, helps prepare for future data analysis. This collaboration between DOE, Argonne, SLAC, and NASA aims to enhance understanding of dark matter and dark energy.