Scientists have suggested that an odd X-ray glow that emanates from some galaxies comes from decaying dark matter. But a search for this glow in the dark matter around the Milky Way came up empty. If that glow did exist, it might look like the colorful halo in this artist’s illustration.
Christopher Dessert, Nicholas Rodd, Benjamin Safdi, Zosia Rostomian, Fermi Large Area Telescope