How are comets often described colloquially regarding their physical composition?

Answer

"Dirty snowballs".

Scientifically, comets are understood to be remnants originating from the formation of the solar system, representing very early, unchanged material. They are frequently described using the colloquial term "dirty snowballs" because their composition primarily consists of a mixture of ice, dust, and rocky material orbiting the Sun. This composition confirms they are primitive bodies carrying the chemical makeup present during the very early stages of the solar nebula.

How are comets often described colloquially regarding their physical composition?
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