Dark matter zoom 2 (IMAGE) Durham University Caption Projected dark matter density map, created using a simulation measuring 2.4 billion light years on each side. The inset square (bottom left) is the deepest zoom in the simulation: it is only 783 light years across, equivalent to 500 times the size of the solar system. In the inset square, the smallest clearly visible dark matter haloes have a mass comparable to that of the Earth (0.000003 the mass of the Sun). Credit Dr Sownak Bose, Center for Astrophysics, Harvard University. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.