This document discusses deep sky objects such as asteroids, meteorites, and comets. It provides information on what asteroids are made of and where they are located in the asteroid belt between Mars and Jupiter. Meteorites are pieces of asteroids or comets that have fallen to Earth. Comets are described as "dirty snowballs" made of dust, ice, and rock that originate from the Oort cloud or Kuiper belt and have tails pointing away from the Sun. Examples of famous comets like Halley and comets that have impacted planets like Jupiter are mentioned. The differences between asteroids, meteorites, and comets are summarized.