standard model of cosmology

The standard model of cosmology explains the universe's origin, evolution, and structure. It posits that about 13.8 billion years ago, the universe began with the Big Bang, a rapid expansion from an extremely hot, dense state. Over time, matter and energy spread out to form galaxies, stars, and planets. Dark matter and dark energy, which make up most of the universe's content, influence its growth and accelerated expansion. The model is supported by observations like cosmic microwave background radiation and galaxy distribution, providing a comprehensive framework for understanding the universe's history and large-scale structure.