As humanity faces the existential threat of potential asteroid impacts, scientists are developing innovative planetary defense strategies to detect and deflect these celestial bodies. Through missions like DART and OSIRIS-REx, researchers are gaining critical insights into the physical properties and orbital dynamics of asteroids, transforming our understanding of these ancient remnants from the solar system's formation. By mapping and tracking near-Earth objects, we are building a robust defense system to safeguard our planet from catastrophic collisions, turning the once-mythical fear of cosmic impact into a manageable scientific challenge.