Final answer:
Comets and asteroids are celestial bodies with distinct characteristics and orbits.
Explanation:
Comets are small, icy objects with highly elliptical orbits that emit gas and dust when near the Sun, forming a tail. They play a role in meteor showers. On the other hand, asteroids are rocky bodies found in the asteroid belt and range from boulders to tiny grains, occasionally causing impact events on Earth. The term 'dirty snowballs' colloquially refers to comets due to their icy composition mixed with debris.
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