New Chandra X-ray Observatory ‘X-arithmetic’ technique ‘paints’ galaxy clusters December 17, 2025 Mary Space Science Using data from the Chandra X-ray Observatory, an ‘X-arithmetic’ technique ‘sorts features in galaxy clusters and groups into three types and then applies a color to each,’ according to NASA. Credit: NASA/CXC/A. Hobart Credit to : VideoFromSpace Please support our Sponsors here :