Dwarf galaxies are misfits when it comes to dark matter ESO

The dark matter in small galaxies has been giving cosmologists a big headache. Now it turns out that blowing up a few stars may provide the solution.

Dark matter is thought to make up most of the matter in the universe and should be found mixed in with the regular matter of galaxies. The standard model of cosmology, called lambda-CDM, predicts that the density of this dark matter should increase as you move towards the centre of a galaxy, but we’ve seen certain dwarf galaxies that didn’t …