Evolution History of Late-Stage Wandering Black Holes Based on the Light-Origin Theory

Based on the core physical logic of the Light-Origin Theory, this paper systematically sorts out the complete evolution history and internal laws of late-stage wandering black holes. A late-stage wandering black hole is the terminal structure formed after all matter of its host galaxy has been exhausted, with no external matter supply and no input of rotational force. The spin speed of such black holes decreases slowly over time, and bipolar jets no longer emerge. A stable three-layer spherically symmetric structure is formed: an inner core of high-energy gamma-ray photons, an intermediate layer with dynamic interchange between photons and material particles, and an outer nebula layer generated by cooled photons. As an aggregate system of high-density photons, the black hole possesses high structural stability and releases energy gradually. During long-term cosmic evolution, high-energy photons in the inner core continuously escape outward, lose energy and materialize to form interstellar nebulae, while the energy and volume of the inner core gradually shrink. Late-stage wandering black holes have two evolutionary paths: most drift in interstellar space and eventually transform entirely into diffuse interstellar nebulae; a small fraction may drift into another galaxy and become its central black hole again, starting a new round of evolutionary cycle.