High-Energy 'Ghost Particle' Traced to Distant Galaxy in Astronomy Breakthrough
By Mike Wall
Astronomers have traced a high-energy neutrino to its cosmic source for the first time ever, solving a century-old mystery in the process.
Neutrinos are nearly massless subatomic particles that have no electric charge and therefore interact rarely with their surroundings. Indeed, trillions of these "ghost particles" stream through your body unnoticed and unhindered every second.