Research Professor and Homewood Professor of Physics and Astronomy Joe Silk is the co-author of a new publication in the journal Physical Review Letters about the cause of the glow at the center of the Milky Way. “We’re in the situation where we have two theories, one posturing dark matter and claiming that it could explain the data we see, another one old stars,” said Silk.
“There’s a 50% chance that it might be dark matter at this point, as opposed to the slightly more mundane explanation of old stars, in my opinion.”