Astronomical debris refers to the material left over from various astronomical events such as supernovae, collisions between celestial bodies, and planetary formation. This debris can take many forms, including dust, rocks, asteroids, comets, and even larger planetary fragments. Studying astronomical debris can provide valuable insights into the history and composition of our solar system, as well as the processes by which planets and other celestial bodies form and evolve. Researchers use various techniques, such as telescopes, spacecraft, and computer simulations, to study astronomical debris and gain a better understanding of the dynamics of space environments.