Metallic asteroids are a type of asteroid primarily composed of metals, such as iron and nickel. They are found mainly in the Asteroid Belt, which lies between the orbits of Mars and Jupiter. These asteroids are believed to be remnants from the early solar system, representing the metallic cores of protoplanets that never fully formed. Unlike rocky asteroids, metallic asteroids are denser and can contain valuable resources. Some scientists and companies are exploring the possibility of mining these asteroids for metals, which could be used in space exploration and technology. Their unique composition makes them an interesting subject of study in planetary science.