Big Bang
Big Bang is a cosmological model describing the early expansion of the universe from a hot, dense initial state. It is used to account for large-scale cosmic structure, background radiation, and observed expansion.
The Big Bang is discussed in cosmology, theoretical physics, and observational astronomy.
Status
The model is supported by multiple lines of observational evidence, including cosmic expansion measurements and the cosmic microwave background. Details of the earliest phases and underlying physical mechanisms remain under investigation.