What is the Relationship between Particle Physics and Cosmology?

Physical cosmology is a branch of astrophysics. It is a discipline that studies basic issues such as the large-scale structure of the universe and the formation and evolution of the universe. The research object of cosmology is the motion of celestial bodies and its first cause. It has been a part of metaphysics for a long time in human history. As science, cosmology originated from the Copernican principles and Newtonian mechanics, and they pointed out that celestial bodies and objects on earth follow the same physical principles and explain the motion of celestial bodies. This branch is now called celestial mechanics. It is generally believed that physical cosmology originated from the 20th century Einstein's general theory of relativity and astronomical observations of extremely distant celestial bodies.