Asteroid formation is the study of the origins and evolution of asteroids, which are small, rocky bodies that orbit the sun. These objects are believed to have formed early in the history of the solar system, along with the planets and other celestial bodies. Researchers in this field study the processes and conditions that led to the formation of asteroids, including the roles of gravity, collisions, and other factors. Understanding asteroid formation can provide insights into the early history of the solar system and the formation of terrestrial planets.