Hundreds of glittering x-ray stars are present in the above NASA’s Chandra X-ray Observatory image of the spiral Galaxy and its neighbor.
This computer animation (after the jump), created using new software called Arepo, simulates 9 billion years of our universe history. The new software can accurately follow the birth and evolution of thousands of galaxies over billions of years. Credit: CfA/UCSD/HITS/M. Vogelsberger (CfA) & V. Springel