Near-Earth Asteroids (NEAs) are small rocky bodies that orbit the Sun and come close to Earth's orbit. They are classified based on their proximity to Earth and can vary in size from a few meters to several kilometers. NEAs are of interest to scientists because they can provide insights into the early solar system and the formation of planets. Some NEAs have the potential to impact Earth, which raises concerns about planetary defense. Organizations like NASA monitor these asteroids to assess their trajectories and potential risks. Understanding NEAs helps improve our ability to predict and mitigate any future threats from space.