Traces of a Mysterious Particle Predicted Decades Ago May Have Been Detected Evidence of a long-sought hypothetical particle could have been hiding in plain (X-ray) sight all this time. The X-ray emission coming off a collection of neutron stars known as the Magnificent Seven is so excessive that it could be coming from axions, a long-predicted kind of particle, forged in the dense cores of these dead objects, scientists have demonstrated.
If their findings are confirmed, this discovery could help unravel some of the mysteries of the physical Universe – including the nature of the mysterious dark matter that holds it all together.