Lambda Cold Dark Matter

Lambda Cold Dark Matter (ΛCDM) is a cosmological model that explains the structure and evolution of the universe. Here, "Lambda" (Λ) represents dark energy, a mysterious force driving the universe's accelerated expansion, while "Cold Dark Matter" refers to a type of matter that does not emit light or energy, making it invisible. It interacts with regular matter through gravity, helping to form galaxies and clusters. This model is foundational in understanding the universe's composition, including its expansion, and fits well with observational data, such as the cosmic microwave background radiation and galaxy distributions.