Friedmann Equations

The Friedmann Equations are key formulas in cosmology that describe how the universe expands over time. They derive from Einstein's theory of General Relativity and incorporate the universe's matter, energy, and curvature. Essentially, they show how the density of matter and energy influences the rate of expansion. The equations help scientists understand different scenarios for the universe's fate, whether it will keep expanding, slow down, or eventually collapse. They are foundational for models of the universe, including the Big Bang theory, and inform our understanding of cosmic phenomena like dark energy and galaxy formation.