Fusion in the Sun’s core releases neutrinos and high-energy photons together: a neutrino can reach the surface in about two seconds, while the photons’ energy may take roughly 170,000 years to escape after countless scatterings, absorptions and re-emissions.

Solar neutrinos escape from the core in seconds, while radiant energy diffuses through dense plasma for roughly 170,000 years before it can leave as sunlight. The post Fusion in the Sun’s core releases neutrinos and high-energy photons together: a neutrino ca…