Astrophysics is a field in astronomy that investigates the physical and chemical properties and structures of astronomical objects, interstellar and intergalactic medium, and spacetime. Computational astrophysics covers all the computational methods and tools developed for astrophysical studies. It provides theoretical astronomy with unique opportunities for experiments by simulations, and it also provides observational astronomy with tools, predictions, and analysis methods. Consequently, the mission of theoretical astrophysics is to act as a bridge between basic theory and observations from KASI and worldwide telescopes.