Final answer:
The composition of comets, which includes frozen light gases and dust, provides insight into the conditions of the early solar system, suggesting that these elements were abundant in the colder outer regions.
Step-by-step explanation:
The compositions of comets are crucial for understanding the formation of the solar system because they are thought to be some of the most primitive objects within it. These icy bodies are composed of frozen gases such as water, carbon dioxide, and carbon monoxide, and they tend to originate from the colder, outer regions of the solar system. This implies that in the early solar system, light gases and ices were more abundant in these distant areas. Because comets have remained largely unchanged since the solar system's formation, they are like cosmic time capsules, holding clues about the conditions and materials that were present at that time.