Difference Between Asteroids and Comets
馃敯The main difference between asteroids and comets is their composition, as in, what they are made of.
馃敯Asteroids are made up of metals and rocky material, while comets are made up of ice, dust and rocky material.
馃敯Both asteroids and comets were formed early in the history of the solar system about 4.5 billion years ago.