Comets are mostly made of ice, snow, and dust. They were created during the formation of our solar system. Typically found past Neptune, they tend to have stable orbits around the sun. As they approach the sun, the ice turns into gas which is then stretched out into a tail by solar radiation giving it a "tail".
Asteroids are the rocky remnants from the formation of planets. They are airless, so they do not have an atmosphere. asteroids range in size from 3 meters across to the size of dwarf planets, a quarter the size of the moon. Most of them are located between Mars and Jupiter in the “asteroid belt”.
Meteoroids, meteors, and meteorites are like asteroids but smaller. They can be no larger than 3 meters across (which would make them an asteroid). While they can be 3 meters across, they can also be as small as a grain of sand. While out in space, they are called meteoroids. When they enter a planet’s atmosphere they become meteors. Many call these “shooting stars”, even though they are not star and certainly not shooting. Most burn up in the atmosphere but if they do survive and hit the planet’s surface, they are called meteorites.
Still hungry for more on the subject? More detailed information from the source article linked to below the ad.
*AD GOES HERE*
Source article from livescience.com can be found here.