The document discusses the classification and characteristics of small solar system bodies including asteroids, comets, meteoroids, and dwarf planets. Asteroids are rocky bodies located between Mars and Jupiter, with over 2 million in the solar system. Comets are remnants of the solar system formation that orbit the sun within hundreds or thousands of years, forming tails when close to the sun due to solar radiation pressure. Meteoroids are debris from asteroids and comets that glow brightly when entering the atmosphere. Dwarf planets orbit the sun and have enough gravity to be spherical but cannot clear their orbital path.