What are objects composed primarily of ice mixed with dust and rock formally known as?

Answer

Comets

Comets are defined by their composition of significant amounts of volatile ices (frozen water, carbon dioxide, methane, and ammonia) mixed with rocky grains and dust particles.

What are objects composed primarily of ice mixed with dust and rock formally known as?

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What is a Comet? | Learn about the Composition and ... - YouTube

celestial bodydustice