Asteroids are also smaller celestial bodies. Meteorites are up to 10 meters. They cannot take other functions (eg comets, dwarf planets, etc.) Asteroids can range in size from a few centimeters to hundreds of kilometers. Asteroids are irregularly shaped, meaning they are not spherical and there are millions in the Milky Way. Asteroids can be seen with the naked eye by the hundreds of thousands, but the fact that you can't really describe them, that is, they are just stones, scientists and researchers have neglected them, is no longer the case. Asteroids have been known for over 200 years.