Simulation of the formation of the dark matter structure surrounding the Milky Way, from the early universe to today. Gravity makes dark matter clump together and form dense structures, referred to as halos (bright areas). The number and distribution of halos depends on the properties of dark matter, such as its mass and its likelihood to interact with normal matter. Galaxies are thought to form inside these halos. In a new study, SLAC and Stanford researchers have used measurements of faint satellite galaxies orbiting the Milky Way to derive limits on how often dark matter particles can possibly collide with regular matter particles.
Ethan Nadler/Risa Wechsler/R. Kaehler/SLAC National Accelerator Laboratory/Stanford University
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SLAC National Accelerator Laboratory explores how the universe works at the biggest, smallest and fastest scales and invents powerful tools used by researchers around the globe. As world leaders in ultrafast science and bold explorers of the physics of the universe, we forge new ground in understanding our origins and building a healthier and more sustainable future. Our discovery and innovation help develop new materials and chemical processes and open unprecedented views of the cosmos and life’s most delicate machinery. Building on more than 60 years of visionary research, we help shape the future by advancing areas such as quantum technology, scientific computing and the development of next-generation accelerators.
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Illustration of how a single crystal sample of silicon deforms during shock compression on nanosecond timescales.
