European scientists have detected a mysterious photon emission in X-ray spectra of the Andromeda galaxy, the Draco dwarf galaxy and some other galaxies and galactic clusters that could be the first evidence of the long-sought dark matter particles. This Hubble composite image shows a ring of dark matter in the galaxy cluster ZwCl0024+1652; the ring-like structure is evident in the blue map of the cluster’s dark matter distribution; the map is...
