Final answer:
Analyzing the elements of planets and moons helps understand their origins and variations within the solar system.
Explanation:
Determining the elements that a planet or moon is made up of is useful because it provides insights into their origins. By analyzing the composition, such as the presence of specific elements like hydrogen, oxygen, and silicon, scientists can infer how these celestial bodies formed and evolved. This information helps in understanding the variations in planetary compositions within our solar system.
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