Flat dark matter sheet solves local galaxy motion puzzle

Berlin, Germany (SPX) Feb 03, 2026

Astronomers have used advanced computer simulations to show that the matter distribution just beyond the Local Group is organized in a vast, flattened structure of dark matter that extends tens of millions of light years. This large scale sheet surrounds the Milky Way and the Andromeda Galaxy and is bordered above and below by enormous voids where galaxies are absent.

For almost a century,