Cosmological Perturbations

Cosmological perturbations are small fluctuations or irregularities in the density and temperature of the universe’s early matter and energy. These tiny variations, originating shortly after the Big Bang, serve as the initial seeds for the formation of large-scale structures like galaxies and clusters. Through gravitational attraction, these slight differences grew over billions of years, shaping the universe’s complex web of cosmic matter. Studying these perturbations helps scientists understand the universe's origins, evolution, and the fundamental physical processes at play during its earliest moments.