👉 Postmillennian is a concept in theoretical physics that refers to a time period during which particles, such as electrons or photons, are not accelerated but instead move at relativistic speeds. This phenomenon has been studied extensively by physicists and astrophysicists for its implications on the structure of space-time and the nature of matter. In the context of particle physics, postmillennian refers to a time period during which particles (such as electrons) have yet to reach the speed of light in
