Far Beneath The In-Between

thenewenlightenmentage:

Missing Dark Matter Located: Intergalactic Space is Filled with Dark Matter

Researchers at the University of Tokyo’s Institute for the Physics and Mathematics of the Universe (IPMU) and Nagoya University used large-scale computer simulations and recent observational data of gravitational lensing to reveal how dark matter is distributed around galaxies.

The new research concludes that galaxies have no definite “edges.” Instead galaxies have long outskirts of dark matter that extend to nearby galaxies and the intergalactic space is not empty but filled with dark matter.

The surface mass density as a function of distance (in units of a hundred thousand light-years). The blue points are observational data, whereas the solid line is the result of a computer simulation. The contributions from the central galaxy (red line) and from nearby galaxies (dashed line) are also shown.

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(via likeaphysicist)